{"id":20644,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/hanning-window\/"},"modified":"2026-07-03T10:03:57","modified_gmt":"2026-07-03T10:03:57","slug":"hanning-window","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/vi\/glossary\/hanning-window\/","title":{"rendered":"C\u1eeda s\u1ed5 Hanning l\u00e0 g\u00ec?"},"content":{"rendered":"<h1>Hi\u1ec3u v\u1ec1 c\u1eeda s\u1ed5 Hanning<\/h1>\n\t\t<section class=\"woocommerce hestia-shop products is-shortcode\" id=\"products\" data-sorder=\"hestia_shop\" >\n\t\t\t\t\t\t<div class=\"\">\n\t\t\t\t\t\t<div class=\"hestia-shop-content\">\n\t\t\t<div class=\"row\" data-aos=\"fade-up\" >\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/balanset-1\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/balanset-1\/\" title=\"M\u00e1y c\u00e2n b\u1eb1ng di \u0111\u1ed9ng &amp; M\u00e1y ph\u00e2n t\u00edch rung \u0111\u1ed9ng Balanset-1A\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"B\u1ed9 \u0111\u1ea7y \u0111\u1ee7 m\u00e1y c\u00e2n b\u1eb1ng v\u00e0 ph\u00e2n t\u00edch rung \u0111\u1ed9ng c\u1ea7m tay Balanset-1A\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/vi\/product-category\/devices\/\" rel=\"tag\">Thi\u1ebft b\u1ecb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/vi\/product\/balanset-1\/\" title=\"M\u00e1y c\u00e2n b\u1eb1ng di \u0111\u1ed9ng &amp; M\u00e1y ph\u00e2n t\u00edch rung \u0111\u1ed9ng Balanset-1A\">M\u00e1y c\u00e2n b\u1eb1ng di \u0111\u1ed9ng &amp; M\u00e1y ph\u00e2n t\u00edch rung \u0111\u1ed9ng Balanset-1A<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,975.00<\/span> + Thu\u1ebf GTGT (n\u1ebfu c\u00f3)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=986\" data-quantity=\"1\" data-product_id=\"986\" data-product_sku=\"BS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=986\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_986\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"986\" data-product_sku=\"BS-1\" aria-label=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o gi\u1ecf h\u00e0ng c\u1ee7a b\u1ea1n\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_986\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/vibration-sensor\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/vibration-sensor\/\" title=\"C\u1ea3m bi\u1ebfn rung\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"C\u1eadn c\u1ea3nh c\u1ea3m bi\u1ebfn rung Balanset-1A\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/vi\/product-category\/parts\/\" rel=\"tag\">Ph\u1ee5 t\u00f9ng<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/vi\/product\/vibration-sensor\/\" title=\"C\u1ea3m bi\u1ebfn rung\">C\u1ea3m bi\u1ebfn rung<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>90.00<\/span> + Thu\u1ebf GTGT (n\u1ebfu c\u00f3)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=1820\" data-quantity=\"1\" data-product_id=\"1820\" data-product_sku=\"VS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=1820\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1820\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1820\" data-product_sku=\"VS-1\" aria-label=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o gi\u1ecf h\u00e0ng c\u1ee7a b\u1ea1n\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1820\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/optical-sensor-for-balanset-and-arbalance\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"C\u1ea3m bi\u1ebfn quang h\u1ecdc (M\u00e1y \u0111o t\u1ed1c \u0111\u1ed9 laser)\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"C\u1ea3m bi\u1ebfn quang h\u1ecdc (M\u00e1y \u0111o t\u1ed1c \u0111\u1ed9 laser)\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1536x1023.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU.webp 1600w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/vi\/product-category\/parts\/\" rel=\"tag\">Ph\u1ee5 t\u00f9ng<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/vi\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"C\u1ea3m bi\u1ebfn quang h\u1ecdc (M\u00e1y \u0111o t\u1ed1c \u0111\u1ed9 laser)\">C\u1ea3m bi\u1ebfn quang h\u1ecdc (M\u00e1y \u0111o t\u1ed1c \u0111\u1ed9 laser)<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>124.00<\/span> + Thu\u1ebf GTGT (n\u1ebfu c\u00f3)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=1832\" data-quantity=\"1\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=1832\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1832\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" aria-label=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o gi\u1ecf h\u00e0ng c\u1ee7a b\u1ea1n\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1832\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/balanset-4\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/balanset-4\/\" title=\"Balanset-4\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"B\u1ed9 d\u1ee5ng c\u1ee5 c\u00e2n b\u1eb1ng r\u00f4to Vibromera: h\u1ed9p \u0111\u1ef1ng, b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh t\u00edn hi\u1ec7u \u0111a k\u00eanh, m\u00e1y ph\u00e2n t\u00edch c\u1ea7m tay, \u0111\u1ebf t\u1eeb, c\u1ea3m bi\u1ebfn rung v\u00e0 d\u00e2y c\u00e1p xo\u1eafn.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4.webp 640w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/vi\/product-category\/devices\/\" rel=\"tag\">Thi\u1ebft b\u1ecb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/vi\/product\/balanset-4\/\" title=\"Balanset-4\">Balanset-4<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>6,803.00<\/span> + Thu\u1ebf GTGT (n\u1ebfu c\u00f3)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=1833\" data-quantity=\"1\" data-product_id=\"1833\" data-product_sku=\"BS-4\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=1833\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1833\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1833\" data-product_sku=\"BS-4\" aria-label=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o gi\u1ecf h\u00e0ng c\u1ee7a b\u1ea1n\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1833\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div><!-- \/.row --><div class=\"row\">\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/magnet-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/magnet-stand\/\" title=\"\u0110\u1ebf t\u1eeb Insize-60-kgf\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\u0110\u1ebf nam ch\u00e2m.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/vi\/product-category\/parts\/\" rel=\"tag\">Ph\u1ee5 t\u00f9ng<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/vi\/product\/magnet-stand\/\" title=\"\u0110\u1ebf t\u1eeb Insize-60-kgf\">\u0110\u1ebf t\u1eeb Insize-60-kgf<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>46.00<\/span> + Thu\u1ebf GTGT (n\u1ebfu c\u00f3)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=1852\" data-quantity=\"1\" data-product_id=\"1852\" data-product_sku=\"MS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=1852\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1852\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1852\" data-product_sku=\"MS-1\" aria-label=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o gi\u1ecf h\u00e0ng c\u1ee7a b\u1ea1n\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1852\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/reflective-tape\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/reflective-tape\/\" title=\"B\u0103ng ph\u1ea3n quang\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"B\u0103ng ph\u1ea3n quang\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-16x12.webp 16w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/vi\/product-category\/parts\/\" rel=\"tag\">Ph\u1ee5 t\u00f9ng<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/vi\/product\/reflective-tape\/\" title=\"B\u0103ng ph\u1ea3n quang\">B\u0103ng ph\u1ea3n quang<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>10.00<\/span> + Thu\u1ebf GTGT (n\u1ebfu c\u00f3)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" data-product_sku=\"rt-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=2329\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2329\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"2329\" data-product_sku=\"rt-1\" aria-label=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o gi\u1ecf h\u00e0ng c\u1ee7a b\u1ea1n\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2329\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/dynamic-balancer-balanset-1a\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/vi\/product\/dynamic-balancer-balanset-1a\/\" title=\"M\u00e1y c\u00e2n b\u1eb1ng \u0111\u1ed9ng \u201cBalanset-1A\u201d OEM\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"N\u1ed9i dung b\u1ed9 s\u1ea3n ph\u1ea9m Balanset-1A bao g\u1ed3m thi\u1ebft b\u1ecb giao di\u1ec7n, c\u1ea3m bi\u1ebfn, m\u00e1y \u0111o t\u1ed1c \u0111\u1ed9 v\u00e0 c\u00e1c ph\u1ee5 ki\u1ec7n\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1024x683.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1536x1024.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-2048x1366.webp 2048w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-e1732998877834.webp 708w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/vi\/product-category\/devices\/\" rel=\"tag\">Thi\u1ebft b\u1ecb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/vi\/product\/dynamic-balancer-balanset-1a\/\" title=\"M\u00e1y c\u00e2n b\u1eb1ng \u0111\u1ed9ng \u201cBalanset-1A\u201d OEM\">M\u00e1y c\u00e2n b\u1eb1ng \u0111\u1ed9ng \u201cBalanset-1A\u201d OEM<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,735.00<\/span> + Thu\u1ebf GTGT (n\u1ebfu c\u00f3)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=4193\" data-quantity=\"1\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/vi\/wp-json\/wp\/v2\/glossary\/20644?add-to-cart=4193\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_4193\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" aria-label=\"Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o gi\u1ecf h\u00e0ng c\u1ee7a b\u1ea1n\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Th\u00eam v\u00e0o gi\u1ecf h\u00e0ng<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_4193\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\n<p>The <strong>C\u1eeda s\u1ed5 Hanning<\/strong> (hay c\u00f2n g\u1ecdi l\u00e0 h\u00e0m Hann, \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean theo Julius von Hann) l\u00e0 m\u1ed9t h\u00e0m tr\u1ecdng s\u1ed1 m\u1ecbn, c\u00f3 h\u00ecnh chu\u00f4ng, \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho m\u1ed9t kh\u1ed1i <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/time-waveform\/\">d\u1ea1ng s\u00f3ng theo th\u1eddi gian<\/a> d\u1eef li\u1ec7u tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u1ebfn m\u1ed9t <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/fft\/\">Bi\u1ebfn \u0111\u1ed5i Fourier nhanh (FFT)<\/a>. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t trong s\u1ed1 t\u1ea5t c\u1ea3 c\u00e1c <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/windowing\/\">c\u1eeda s\u1ed5<\/a> c\u00e1c ch\u1ee9c n\u0103ng trong <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/vibration-analysis\/\">Ph\u00e2n t\u00edch rung \u0111\u1ed9ng<\/a>, v\u00e0 m\u1ee5c \u0111\u00edch duy nh\u1ea5t c\u1ee7a n\u00f3 l\u00e0 lo\u1ea1i b\u1ecf m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng sai l\u1ec7ch trong \u0111o l\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/spectral-leakage\/\">r\u00f2 r\u1ec9 ph\u1ed5<\/a>. Khi h\u00e0m c\u1eeda s\u1ed5 \u0111\u01b0\u1ee3c nh\u00e2n v\u1edbi t\u00edn hi\u1ec7u \u0111\u00e3 thu \u0111\u01b0\u1ee3c, n\u00f3 s\u1ebd l\u00e0m cho bi\u00ean \u0111\u1ed9 gi\u1ea3m d\u1ea7n v\u1ec1 0 \u1edf \u0111\u1ea7u v\u00e0 cu\u1ed1i kho\u1ea3ng th\u1eddi gian, trong khi ph\u1ea7n gi\u1eefa c\u1ee7a t\u00edn hi\u1ec7u v\u1ec1 c\u01a1 b\u1ea3n v\u1eabn kh\u00f4ng thay \u0111\u1ed5i.<\/p>\n<h2>1. \u0110\u1ecbnh ngh\u0129a: C\u1eeda s\u1ed5 Hanning l\u00e0 g\u00ec?<\/h2>\n<p>V\u1ec1 m\u1eb7t to\u00e1n h\u1ecdc, c\u1eeda s\u1ed5 Hanning l\u00e0 m\u1ed9t n\u1eeda cosin n\u00e2ng: m\u1ed7i m\u1eabu th\u1eddi gian \u0111\u01b0\u1ee3c nh\u00e2n v\u1edbi m\u1ed9t h\u1ec7 s\u1ed1 t\u0103ng t\u1eeb 0 \u1edf m\u1eabu \u0111\u1ea7u ti\u00ean, \u0111\u1ea1t 1 \u1edf gi\u1eefa kh\u1ed1i, r\u1ed3i gi\u1ea3m v\u1ec1 0 \u1edf m\u1eabu cu\u1ed1i c\u00f9ng. \u0110\u01b0\u1eddng cong tu\u00e2n theo d\u1ea1ng \u0111\u1ed1i x\u1ee9ng <em>w(n) = 0.5 \u2212 0.5\u00b7cos(2\u03c0n\/(N\u22121))<\/em>, n\u01a1i <em>N<\/em> l\u00e0 ch\u1ec9 s\u1ed1 m\u1eabu ch\u1ea1y t\u1eeb 0 \u0111\u1ebfn <em>N\u22121<\/em> and <em>N<\/em> l\u00e0 chi\u1ec1u d\u00e0i kh\u1ed1i. (Nhi\u1ec1u m\u00e1y ph\u00e2n t\u00edch FFT tri\u1ec3n khai bi\u1ebfn th\u1ec3 tu\u1ea7n ho\u00e0n r\u1ea5t g\u1ea7n, chia cho <em>N<\/em> thay v\u00e0o \u0111\u00f3 v\u00e0 \u0111\u1ec3 m\u1eabu cu\u1ed1i cao h\u01a1n 0 m\u1ed9t ch\u00fat; \u0111\u1ed1i v\u1edbi ph\u1ed5 m\u00e1y m\u00f3c th\u1ef1c t\u1ebf, kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 kh\u00f4ng \u0111\u00e1ng k\u1ec3.) H\u00ecnh d\u1ea1ng n\u00e0y quan tr\u1ecdng v\u00ec n\u00f3 l\u00e0m thu\u00f4n d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch nh\u1eb9 nh\u00e0ng thay v\u00ec c\u1eaft c\u1ee5t \u0111\u1ed9t ng\u1ed9t. B\u1eb1ng c\u00e1ch \u0111\u01b0a hai \u0111\u1ea7u m\u00fat v\u1ec1 0, kh\u1ed1i \u0111\u00e3 qua c\u1eeda s\u1ed5 c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i n\u1ed1i ti\u1ebfp m\u00e0 kh\u00f4ng c\u00f3 b\u01b0\u1edbc nh\u1ea3y \u0111\u1ed9t ng\u1ed9t \u2014 ch\u00ednh l\u00e0 \u0111i\u1ec1u ki\u1ec7n m\u00e0 FFT ng\u1ea7m gi\u1ea3 \u0111\u1ecbnh.<\/p>\n<h2>2. T\u1ea1i sao c\u1ea7n c\u00f3 c\u1eeda s\u1ed5: Hi\u1ec7n t\u01b0\u1ee3ng r\u00f2 r\u1ec9 ph\u1ed5<\/h2>\n<p>Ph\u01b0\u01a1ng ph\u00e1p FFT x\u1eed l\u00fd kh\u1ed1i m\u1eabu h\u1eefu h\u1ea1n m\u00e0 n\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c nh\u01b0 <em>m\u1ed9t chu k\u1ef3 ho\u00e0n h\u1ea3o, l\u1eb7p \u0111i l\u1eb7p l\u1ea1i v\u00f4 t\u1eadn<\/em> c\u1ee7a t\u00edn hi\u1ec7u. Gi\u1ea3 \u0111\u1ecbnh \u0111\u00f3 ch\u1ec9 \u0111\u00fang n\u1ebfu s\u1ed1 chu k\u1ef3 nguy\u00ean c\u1ee7a m\u1ed7i th\u00e0nh ph\u1ea7n t\u1ea7n s\u1ed1 v\u1eeba kh\u00edt v\u1edbi kh\u1ed1i. \u0110\u1ed1i v\u1edbi m\u1ed9t m\u00e1y m\u00f3c th\u1ef1c t\u1ebf \u2014 n\u01a1i t\u1ed1c \u0111\u1ed9 tr\u1ee5c dao \u0111\u1ed9ng nh\u1eb9 v\u00e0 nhi\u1ec1u t\u1ea7n s\u1ed1 kh\u00f4ng li\u00ean quan c\u00f9ng t\u1ed3n t\u1ea1i \u2014 \u0111i\u1ec1u n\u00e0y h\u1ea7u nh\u01b0 kh\u00f4ng bao gi\u1edd x\u1ea3y ra.<\/p>\n<p>Khi s\u1ed1 chu k\u1ef3 thu \u0111\u01b0\u1ee3c kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ed1 nguy\u00ean, ph\u1ea7n cu\u1ed1i c\u1ee7a kh\u1ed1i s\u1ebd kh\u00f4ng tr\u00f9ng kh\u1edbp v\u1edbi ph\u1ea7n \u0111\u1ea7u. FFT s\u1ebd hi\u1ec3u s\u1ef1 kh\u00f4ng kh\u1edbp n\u00e0y l\u00e0 m\u1ed9t b\u01b0\u1edbc nh\u1ea3y \u0111\u1ed9t ng\u1ed9t, hay s\u1ef1 gi\u00e1n \u0111o\u1ea1n, t\u1ea1i ranh gi\u1edbi kh\u1ed1i. B\u01b0\u1edbc nh\u1ea3y nh\u00e2n t\u1ea1o n\u00e0y mang theo n\u0103ng l\u01b0\u1ee3ng kh\u00f4ng thu\u1ed9c v\u1ec1 t\u00edn hi\u1ec7u th\u1ef1c, v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111\u00f3 \u201cr\u00f2 r\u1ec9\u201d sang c\u00e1c \u00f4 t\u1ea7n s\u1ed1 l\u00e2n c\u1eadn c\u1ee7a <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/spectrum\/\">ph\u1ed5<\/a>. H\u1eadu qu\u1ea3 l\u00e0:<\/p>\n<ul>\n<li><strong>L\u00e0m nh\u00f2e:<\/strong> M\u1ed9t \u0111\u1ec9nh t\u1ea7n s\u1ed1 s\u1eafc n\u00e9t duy nh\u1ea5t lan r\u1ed9ng th\u00e0nh m\u1ed9t d\u1ea3i t\u1ea7n s\u1ed1 r\u1ed9ng, c\u00f3 h\u00ecnh d\u00e1ng nh\u01b0 m\u1ed9t c\u00e1i g\u00f9, khi\u1ebfn vi\u1ec7c x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c t\u1ea7n s\u1ed1 \u0111\u00f3 tr\u1edf n\u00ean kh\u00f3 kh\u0103n.<\/li>\n<li><strong>Che ph\u1ee7:<\/strong> M\u1ee9c nhi\u1ec5u n\u1ec1n t\u0103ng cao xung quanh m\u1ed9t \u0111\u1ec9nh t\u00edn hi\u1ec7u m\u1ea1nh c\u00f3 th\u1ec3 che l\u1ea5p ho\u00e0n to\u00e0n m\u1ed9t \u0111\u1ec9nh t\u00edn hi\u1ec7u nh\u1ecf n\u1eb1m g\u1ea7n \u0111\u00f3 \u2014 v\u00ed d\u1ee5 nh\u01b0 m\u1ed9t t\u1ea7n s\u1ed1 mang t\u00edn hi\u1ec7u m\u1ee9c th\u1ea5p n\u1eb1m s\u00e1t m\u1ed9t \u0111\u1ec9nh t\u00edn hi\u1ec7u ch\u1ee7 \u0111\u1ea1o <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/running-speed\/\">t\u1ed1c \u0111\u1ed9 ch\u1ea1y (1\u00d7)<\/a> th\u00e0nh ph\u1ea7n.<\/li>\n<\/ul>\n<h2>3. C\u00e1ch c\u1eeda s\u1ed5 Hanning gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1<\/h2>\n<p>Do c\u1eeda s\u1ed5 bu\u1ed9c t\u00edn hi\u1ec7u v\u1ec1 0 t\u1ea1i c\u1ea3 hai ranh gi\u1edbi, n\u00ean s\u1ef1 gi\u00e1n \u0111o\u1ea1n nh\u00e2n t\u1ea1o bi\u1ebfn m\u1ea5t. FFT gi\u1edd \u0111\u00e2y nh\u1eadn th\u1ea5y m\u1ed9t kh\u1ed1i c\u00f3 s\u1ef1 chuy\u1ec3n ti\u1ebfp m\u01b0\u1ee3t m\u00e0 v\u00e0 th\u1ef1c s\u1ef1 tu\u1ea7n ho\u00e0n, t\u1eeb \u0111\u00f3 x\u1eed l\u00fd n\u00f3 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c h\u01a1n nhi\u1ec1u. Hi\u1ec7n t\u01b0\u1ee3ng r\u00f2 r\u1ec9 gi\u1ea3m \u0111\u00e1ng k\u1ec3, mang l\u1ea1i hai l\u1ee3i \u00edch th\u1ef1c ti\u1ec5n:<\/p>\n<ul>\n<li><strong>\u0110\u1ecbnh ngh\u0129a t\u1ea7n s\u1ed1 ch\u00ednh x\u00e1c h\u01a1n:<\/strong> hi\u1ec7n t\u01b0\u1ee3ng lan m\u00e0u \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, do \u0111\u00f3 c\u00e1c \u0111\u1ec9nh tr\u1edf n\u00ean h\u1eb9p v\u00e0 t\u00e1ch bi\u1ec7t r\u00f5 r\u00e0ng. C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m n\u1eb1m g\u1ea7n nhau \u2014 ch\u1eb3ng h\u1ea1n nh\u01b0 <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/harmonics\/\">h\u00e0i \u00e2m t\u1ed1c \u0111\u1ed9 ch\u1ea1y<\/a> ng\u1ed3i g\u1ea7n <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/bearing-fault-frequencies\/\">t\u1ea7n s\u1ed1 l\u1ed7i \u1ed5 tr\u1ee5c<\/a> \u2014 h\u00e3y gi\u1eef s\u1ef1 kh\u00e1c bi\u1ec7t.<\/li>\n<li><strong>\u0110\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 bi\u00ean \u0111\u1ed9 cao h\u01a1n:<\/strong> vi\u1ec7c thu\u00f4n d\u1eef li\u1ec7u qu\u1ea3 th\u1ef1c l\u00e0m gi\u1ea3m m\u1ee9c bi\u1ec3u ki\u1ebfn, v\u00ec v\u1eady m\u00e1y ph\u00e2n t\u00edch \u00e1p d\u1ee5ng h\u1ec7 s\u1ed1 hi\u1ec7u ch\u1ec9nh c\u1eeda s\u1ed5 \u2014 v\u00e0 h\u1ec7 s\u1ed1 \u0111\u00fang ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ea1i l\u01b0\u1ee3ng \u0111ang \u0111\u1ecdc. V\u1edbi bi\u00ean \u0111\u1ed9 c\u1ee7a m\u1ed9t t\u00f4ng r\u1eddi r\u1ea1c, h\u1ec7 s\u1ed1 coherent gain c\u1ee7a c\u1eeda s\u1ed5 Hanning l\u00e0 0.5, n\u00ean hi\u1ec7u ch\u1ec9nh bi\u00ean \u0111\u1ed9 l\u00e0 2.0 (+6.02 dB). V\u1edbi m\u1ee9c d\u1ea3i r\u1ed9ng ho\u1eb7c nhi\u1ec5u, \u00e1p d\u1ee5ng hi\u1ec7u ch\u1ec9nh n\u0103ng l\u01b0\u1ee3ng (RMS) 1.633 (\u221a(8\/3)) v\u00ec b\u0103ng th\u00f4ng nhi\u1ec5u t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a c\u1eeda s\u1ed5 l\u00e0 1.5 bin. D\u1ee5ng c\u1ee5 c\u1ee7a b\u1ea1n d\u00f9ng hi\u1ec7u ch\u1ec9nh n\u00e0o l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a quy \u01b0\u1edbc hi\u1ec3n th\u1ecb c\u1ee7a n\u00f3 \u2014 h\u1ea7u h\u1ebft m\u00e1y ph\u00e2n t\u00edch \u00e1p d\u1ee5ng t\u1ef1 \u0111\u1ed9ng. V\u00ec \u00edt n\u0103ng l\u01b0\u1ee3ng b\u1ecb r\u00f2 sang c\u00e1c bin l\u00e2n c\u1eadn h\u01a1n, bi\u00ean \u0111\u1ed9 b\u00e1o t\u1ea1i \u0111\u00fang bin \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/li>\n<\/ul>\n<p>Chi ph\u00ed duy nh\u1ea5t l\u00e0 \u0111\u1ed9 r\u1ed9ng c\u1ee7a d\u1ea3i t\u1ea7n ch\u00ednh s\u1ebd t\u0103ng l\u00ean m\u1ed9t ch\u00fat \u2014 m\u1ed9t t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c l\u1ecdc qua c\u1eeda s\u1ed5 Hanning c\u00f3 \u0111\u1ed9 r\u1ed9ng kho\u1ea3ng b\u1ed1n \u00f4. N\u1ebfu hai t\u1ea7n s\u1ed1 n\u1eb1m g\u1ea7n nhau h\u01a1n m\u1ee9c \u0111\u00f3, b\u1ea1n c\u1ea7n \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao h\u01a1n thay v\u00ec s\u1eed d\u1ee5ng m\u1ed9t lo\u1ea1i c\u1eeda s\u1ed5 kh\u00e1c; m\u1ed9t c\u00e1ch nhanh ch\u00f3ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c th\u00f4ng s\u1ed1 l\u00e0 <a href=\"https:\/\/vibromera.eu\/vi\/calculators\/fft-resolution-calculator\/\">M\u00e1y t\u00ednh \u0111\u1ed9 ph\u00e2n gi\u1ea3i FFT<\/a>, trong \u0111\u00f3 n\u00eau r\u00f5 m\u1ed1i quan h\u1ec7 gi\u1eefa \u0111\u1ed9 d\u00e0i kh\u1ed1i, t\u1ea7n s\u1ed1 l\u1ea5y m\u1eabu v\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c d\u00f2ng.<\/p>\n<h2>4. Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng c\u1eeda s\u1ed5 Hanning<\/h2>\n<p>C\u1eeda s\u1ed5 Hanning l\u00e0 <strong>m\u1eb7c \u0111\u1ecbnh, l\u1ef1a ch\u1ecdn \u0111a n\u0103ng<\/strong> \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111o rung \u0111\u1ed9ng m\u00e1y m\u00f3c \u1edf tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng tuy\u1ec7t v\u1eddi gi\u1eefa \u0111\u1ed9 ph\u00e2n gi\u1ea3i t\u1ea7n s\u1ed1 (ph\u00e2n bi\u1ec7t c\u00e1c \u0111\u1ec9nh t\u1ea7n s\u1ed1 g\u1ea7n nhau) v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c bi\u00ean \u0111\u1ed9 (\u0111\u1ecdc \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 ch\u00ednh x\u00e1c). \u0110\u1ed1i v\u1edbi vi\u1ec7c ph\u00e2n t\u00edch ph\u1ed5 FFT th\u01b0\u1eddng xuy\u00ean tr\u00ean \u0111\u1ed9ng c\u01a1, m\u00e1y b\u01a1m, qu\u1ea1t v\u00e0 m\u00e1y n\u00e9n, \u0111\u00e2y l\u00e0 c\u00e0i \u0111\u1eb7t ph\u00f9 h\u1ee3p trong ph\u1ea7n l\u1edbn c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u2014 v\u00e0 \u0111\u00e2y c\u0169ng ch\u00ednh l\u00e0 ch\u1ebf \u0111\u1ed9 c\u1eeda s\u1ed5 c\u1ee7a thi\u1ebft b\u1ecb \u0111o rung \u0111\u1ed9ng di \u0111\u1ed9ng hai k\u00eanh <a href=\"https:\/\/vibromera.eu\/vi\/san-pham\/balanset-1\/\">Balanset-1A<\/a> \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng khi t\u00ednh to\u00e1n ph\u1ed5 ch\u1ea9n \u0111o\u00e1n t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng, n\u01a1i t\u1ed1c \u0111\u1ed9 tr\u1ee5c kh\u00f4ng bao gi\u1edd ho\u00e0n to\u00e0n \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng r\u00f2 r\u1ec9 c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch k\u1ebft qu\u1ea3.<\/p>\n<h2>5. So s\u00e1nh Hanning v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c<\/h2>\n<p>C\u1eeda s\u1ed5 Hanning kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ef1a ch\u1ecdn duy nh\u1ea5t, v\u00e0 vi\u1ec7c ch\u1ecdn c\u1eeda s\u1ed5 ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o d\u1eef li\u1ec7u b\u1ea1n mu\u1ed1n tr\u00edch xu\u1ea5t:<\/p>\n<ul>\n<li><strong>Flattop:<\/strong> c\u1ed1 \u00fd hy sinh \u0111\u1ed9 ph\u00e2n gi\u1ea3i t\u1ea7n s\u1ed1 \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 bi\u00ean \u0111\u1ed9 r\u1ea5t cao. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c \u01b0u ti\u00ean l\u1ef1a ch\u1ecdn khi hi\u1ec7u chu\u1ea9n c\u1ea3m bi\u1ebfn ho\u1eb7c \u0111o m\u1ee9c \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a m\u1ed9t t\u1ea7n s\u1ed1 ch\u1ee7 \u0111\u1ea1o duy nh\u1ea5t.<\/li>\n<li><strong>\u0110\u1ed3ng ph\u1ee5c (h\u00ecnh ch\u1eef nh\u1eadt \/ \u201ckh\u00f4ng c\u00f3 c\u1eeda s\u1ed5\u201d):<\/strong> kh\u00f4ng \u00e1p d\u1ee5ng b\u1ea5t k\u1ef3 \u0111\u1ed9 d\u1ed1c n\u00e0o. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c s\u1ef1 ki\u1ec7n tho\u00e1ng qua v\u00e0 va ch\u1ea1m \u2014 ch\u1eb3ng h\u1ea1n nh\u01b0 <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/bump-test\/\">ki\u1ec3m tra va ch\u1ea1m<\/a> \u2014 v\u1ed1n \u0111\u00e3 b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac t\u1ea1i v\u1ecb tr\u00ed 0 trong kh\u1ed1i, n\u00ean kh\u00f4ng c\u1ea7n c\u1eeda s\u1ed5.<\/li>\n<li><strong>Hanning:<\/strong> m\u1ed9t gi\u1ea3i ph\u00e1p c\u00e2n b\u1eb1ng, v\u00e0 do \u0111\u00f3 tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n cho ch\u1ea9n \u0111o\u00e1n h\u00e0ng ng\u00e0y.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, h\u00e3y ch\u1ecdn Flattop khi c\u1ea7n \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 bi\u00ean \u0111\u1ed9, Uniform khi thu nh\u1eadn m\u1ed9t t\u00edn hi\u1ec7u tho\u00e1ng qua \u0111\u1ed9c l\u1eadp, v\u00e0 Hanning cho m\u1ecdi tr\u01b0\u1eddng h\u1ee3p c\u00f2n l\u1ea1i \u2014 t\u1ee9c l\u00e0 trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/vi\/glossary\/\">\u2190 Quay l\u1ea1i M\u1ee5c l\u1ee5c ch\u00ednh<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u v\u1ec1 c\u1eeda s\u1ed5 Hanning, m\u1ed9t h\u00e0m t\u1ea1o c\u1eeda s\u1ed5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong ph\u00e2n t\u00edch FFT gi\u00fap gi\u1ea3m r\u00f2 r\u1ec9 ph\u1ed5 b\u1eb1ng c\u00e1ch thu h\u1eb9p c\u00e1c \u0111\u1ea7u c\u1ee7a d\u1ea1ng s\u00f3ng th\u1eddi gian.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-20644","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/glossary\/20644","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/glossary\/20644\/revisions"}],"predecessor-version":[{"id":102172,"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/glossary\/20644\/revisions\/102172"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/media?parent=20644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/categories?post=20644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/tags?post=20644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}