{"id":98,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/degrees-of-freedom\/"},"modified":"2026-05-23T22:17:55","modified_gmt":"2026-05-23T22:17:55","slug":"degrees-of-freedom","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/vi\/glossary\/degrees-of-freedom\/","title":{"rendered":"B\u1eadc t\u1ef1 do (DOF) l\u00e0 g\u00ec? \u2013 C\u01a1 s\u1edf rung \u0111\u1ed9ng"},"content":{"rendered":"<h1>Hi\u1ec3u v\u1ec1 c\u00e1c b\u1eadc t\u1ef1 do (DOF)<\/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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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\/98?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>Trong c\u01a1 h\u1ecdc v\u00e0 <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/vibration-analysis\/\">Ph\u00e2n t\u00edch rung \u0111\u1ed9ng<\/a>, <strong>B\u1eadc t\u1ef1 do (DOF)<\/strong> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn s\u1ed1 t\u1ecda \u0111\u1ed9 \u0111\u1ed9c l\u1eadp c\u1ea7n thi\u1ebft \u0111\u1ec3 m\u00f4 t\u1ea3 ho\u00e0n to\u00e0n v\u1ecb tr\u00ed v\u00e0 h\u01b0\u1edbng c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 ho\u1eb7c h\u1ec7 th\u1ed1ng trong kh\u00f4ng gian \u2014 n\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, s\u1ed1 c\u00e1ch ri\u00eang bi\u1ec7t m\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed9ng. Kh\u00e1i ni\u1ec7m n\u00e0y l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 hi\u1ec3u b\u1ea5t c\u1ee9 th\u1ee9 g\u00ec rung \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o, b\u1edfi v\u00ec s\u1ed1 b\u1eadc t\u1ef1 do tr\u1ef1c ti\u1ebfp ch\u1ec9 ra c\u00f3 bao nhi\u00eau <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/natural-frequency\/\">t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean<\/a> and <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/mode-shape\/\">h\u00ecnh d\u1ea1ng ch\u1ebf \u0111\u1ed9<\/a> m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 s\u1edf h\u1eefu.<\/p>\n<h2>1. \u0110\u1ecbnh ngh\u0129a: B\u1eadc T\u1ef1 do l\u00e0 g\u00ec?<\/h2>\n<p>B\u1eadc t\u1ef1 do l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp m\u00e0 m\u1ed9t kh\u1ed1i l\u01b0\u1ee3ng c\u00f3 th\u1ec3 t\u00edch tr\u1eef v\u00e0 trao \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111\u1ed9ng h\u1ecdc v\u00e0 th\u1ebf n\u0103ng khi n\u00f3 rung \u0111\u1ed9ng. M\u1ed7i t\u1ecda \u0111\u1ed9 \u0111\u1ed9c l\u1eadp th\u00eam m\u1ed9t h\u00e0nh vi c\u1ed9ng h\u01b0\u1edfng c\u00f3 th\u1ec3, v\u00ec v\u1eady vi\u1ec7c \u0111\u1ebfm DOF l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong vi\u1ec7c d\u1ef1 \u0111o\u00e1n c\u00e1ch m\u1ed9t c\u1ea5u tr\u00fac s\u1ebd \u0111\u00e1p \u1ee9ng v\u1edbi k\u00edch th\u00edch. Quy t\u1eafc n\u00e0y nh\u1ea5t qu\u00e1n tr\u00ean to\u00e0n b\u1ed9 l\u00fd thuy\u1ebft rung \u0111\u1ed9ng: m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f3 <em>N<\/em> b\u1eadc t\u1ef1 do c\u00f3 ch\u00ednh x\u00e1c <em>N<\/em> t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean, m\u1ed7i t\u1ea7n s\u1ed1 c\u00f3 h\u00ecnh d\u1ea1ng ch\u1ebf \u0111\u1ed9 ri\u00eang m\u00f4 t\u1ea3 chuy\u1ec3n \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a m\u1ed7i ph\u1ea7n t\u1ea1i t\u1ea7n s\u1ed1 \u0111\u00f3.<\/p>\n<h2>2. V\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n v\u1ec1 DOF<\/h2>\n<ul>\n<li><strong>H\u1ec7 th\u1ed1ng M\u1ed9t B\u1eadc T\u1ef1 do (SDOF):<\/strong> h\u1ec7 th\u1ed1ng dao \u0111\u1ed9ng \u0111\u01a1n gi\u1ea3n nh\u1ea5t, th\u01b0\u1eddng \u0111\u01b0\u1ee3c v\u1ebd d\u01b0\u1edbi d\u1ea1ng m\u1ed9t kh\u1ed1i l\u01b0\u1ee3ng tr\u00ean l\u00f2 xo v\u1edbi m\u1ed9t b\u1ed9 gi\u1ea3m ch\u1ea5n. Kh\u1ed1i l\u01b0\u1ee3ng ch\u1ec9 c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed9ng theo m\u1ed9t h\u01b0\u1edbng \u2014 ch\u1eb3ng h\u1ea1n nh\u01b0 l\u00ean xu\u1ed1ng \u2014 v\u00ec v\u1eady n\u00f3 c\u00f3 m\u1ed9t b\u1eadc t\u1ef1 do v\u00e0 ch\u00ednh x\u00e1c m\u1ed9t t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean. M\u00f4 h\u00ecnh SDOF l\u00e0 c\u00f4ng c\u1ee5 ch\u00ednh y\u1ebfu c\u1ee7a l\u00fd thuy\u1ebft dao \u0111\u1ed9ng v\u00ec n\u00f3 n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c s\u1ef1 t\u01b0\u01a1ng t\u00e1c thi\u1ebft y\u1ebfu c\u1ee7a kh\u1ed1i l\u01b0\u1ee3ng, <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/stiffness\/\">\u0111\u1ed9 c\u1ee9ng<\/a> and <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/damping\/\">gi\u1ea3m ch\u1ea5n<\/a> trong m\u1ed9t ph\u01b0\u01a1ng tr\u00ecnh g\u1ecdn g\u00e0ng duy nh\u1ea5t.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng hai b\u1eadc t\u1ef1 do:<\/strong> h\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng hai kh\u1ed1i l\u01b0\u1ee3ng n\u1ed1i v\u1edbi nhau v\u00e0 v\u1edbi c\u00e1c \u0111i\u1ec3m c\u1ed1 \u0111\u1ecbnh b\u1eb1ng l\u00f2 xo. M\u1ed7i kh\u1ed1i l\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp, v\u00ec v\u1eady b\u1ea1n c\u1ea7n hai t\u1ecda \u0111\u1ed9 \u2014 v\u1ecb tr\u00ed c\u1ee7a m\u1ed7i kh\u1ed1i l\u01b0\u1ee3ng \u2014 \u0111\u1ec3 m\u00f4 t\u1ea3 h\u1ec7 th\u1ed1ng. Do \u0111\u00f3, n\u00f3 c\u00f3 hai b\u1eadc t\u1ef1 do v\u00e0 hai t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean ri\u00ean bi\u1ec7t, m\u1ed7i c\u00e1i t\u1ea1o ra h\u00ecnh d\u1ea1ng ch\u1ebf \u0111\u1ed9 ri\u00eang c\u1ee7a n\u00f3 (c\u00e1c kh\u1ed1i l\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed9ng c\u00f9ng b\u01b0\u1edbc, sau \u0111\u00f3 chuy\u1ec3n \u0111\u1ed9ng ng\u01b0\u1ee3c chi\u1ec1u).<\/li>\n<\/ul>\n<h2>3. DOF trong c\u00e1c c\u1ea5u tr\u00fac th\u1ebf gi\u1edbi th\u1ef1c<\/h2>\n<p>M\u1ed9t v\u1eadt r\u1eafn nh\u1ecf n\u1ed5i t\u1ef1 do trong kh\u00f4ng gian c\u00f3 <strong>s\u00e1u b\u1eadc t\u1ef1 do<\/strong> \u2014 ba chuy\u1ec3n \u0111\u1ed9ng t\u1ecbnh ti\u1ebfn v\u00e0 ba chuy\u1ec3n \u0111\u1ed9ng quay:<\/p>\n<ol>\n<li><strong>B\u1ea3n d\u1ecbch<\/strong> d\u1ecdc theo tr\u1ee5c X (ti\u1ebfn\/l\u00f9i)<\/li>\n<li><strong>B\u1ea3n d\u1ecbch<\/strong> d\u1ecdc theo tr\u1ee5c Y (tr\u00e1i\/ph\u1ea3i)<\/li>\n<li><strong>B\u1ea3n d\u1ecbch<\/strong> d\u1ecdc theo tr\u1ee5c Z (l\u00ean\/xu\u1ed1ng)<\/li>\n<li><strong>S\u1ef1 quay<\/strong> quanh tr\u1ee5c X (l\u0103n)<\/li>\n<li><strong>S\u1ef1 quay<\/strong> quanh tr\u1ee5c Y (pitch)<\/li>\n<li><strong>S\u1ef1 quay<\/strong> quanh tr\u1ee5c Z (yaw)<\/li>\n<\/ol>\n<p>H\u00ecnh \u1ea3nh s\u00e1u b\u1eadc t\u1ef1 do n\u00e0y l\u00e0 l\u00fd do t\u1ea1i sao dao \u0111\u1ed9ng c\u1ee7a m\u00e1y \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 theo nhi\u1ec1u h\u01b0\u1edbng c\u00f9ng m\u1ed9t l\u00fac \u2014 theo h\u01b0\u1edbng xuy\u00ean t\u00e2m ngang, xuy\u00ean t\u00e2m d\u1ecdc v\u00e0 <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/axial-vibration\/\">tr\u1ee5c<\/a> \u2014 v\u00e0 v\u00ec sao m\u1ed9t c\u1ea3m bi\u1ebfn \u0111\u01b0\u1ee3c \u0111\u1eb7t ch\u1ec9 theo m\u1ed9t h\u01b0\u1edbng c\u00f3 th\u1ec3 b\u1ecf l\u1ee1 chuy\u1ec3n \u0111\u1ed9ng x\u1ea3y ra theo m\u1ed9t h\u01b0\u1edbng kh\u00e1c. Tuy nhi\u00ean, c\u00e1c m\u00e1y th\u1ef1c t\u1ebf v\u00e0 c\u1ea5u tr\u00fac kh\u00f4ng ph\u1ea3i l\u00e0 nh\u1eefng v\u1eadt r\u1eafn \u0111\u01a1n gi\u1ea3n; ch\u00fang l\u00e0 nh\u1eefng h\u1ec7 th\u1ed1ng li\u00ean t\u1ee5c \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1eeb v\u00f4 s\u1ed1 h\u1ea1t li\u00ean k\u1ebft v\u1edbi nhau. V\u1ec1 nguy\u00ean t\u1eafc, m\u1ed9t th\u00e0nh ph\u1ea7n li\u00ean t\u1ee5c nh\u01b0 m\u1ed9t thanh th\u00e9p, m\u1ed9t rotor ho\u1eb7c v\u1ecf m\u00e1y c\u00f3 m\u1ed9t <strong>s\u1ed1 l\u01b0\u1ee3ng v\u00f4 h\u1ea1n c\u00e1c b\u1eadc t\u1ef1 do<\/strong>, v\u00e0 do \u0111\u00f3 m\u1ed9t ph\u1ed5 v\u00f4 h\u1ea1n c\u00e1c t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean v\u00e0 h\u00ecnh d\u1ea1ng ch\u1ebf \u0111\u1ed9.<\/p>\n<h2>4. \u00dd ngh\u0129a th\u1ef1c ti\u1ec5n \u0111\u1ed1i v\u1edbi ph\u00e2n t\u00edch rung \u0111\u1ed9ng<\/h2>\n<p>Th\u1ef1c t\u1ebf l\u00e0 c\u00e1c m\u00e1y th\u1ef1c t\u1ebf c\u00f3 m\u1ed9t s\u1ed1 b\u1eadc t\u1ef1 do c\u00f3 hi\u1ec7u l\u1ef1c v\u00f4 h\u1ea1n mang theo m\u1ed9t h\u1ec7 qu\u1ea3 quan tr\u1ecdng: <strong>ch\u00fang c\u00f3 s\u1ed1 l\u01b0\u1ee3ng r\u1ea5t l\u1edbn c\u00e1c t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean v\u00e0 c\u00e1c d\u1ea1ng ch\u1ebf \u0111\u1ed9 t\u01b0\u01a1ng \u1ee9ng.<\/strong><\/p>\n<ul>\n<li><strong>Nhi\u1ec1u c\u1ed9ng h\u01b0\u1edfng:<\/strong> m\u1ed9t m\u00e1y kh\u00f4ng c\u00f3 m\u1ed9t t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean duy nh\u1ea5t m\u00e0 c\u00f3 nhi\u1ec1u t\u1ea7n s\u1ed1. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao m\u1ed9t m\u00e1y c\u00f3 th\u1ec3 ch\u1ea1y tr\u01a1n tru \u1edf m\u1ed9t t\u1ed1c \u0111\u1ed9 nh\u01b0ng l\u1ea1i g\u1eb7p ph\u1ea3i m\u1ed9t <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/resonance\/\">s\u1ef1 c\u1ed9ng h\u01b0\u1edfng<\/a> khi t\u1ed1c \u0111\u1ed9 t\u0103ng l\u00ean v\u00e0 k\u00edch th\u00edch m\u1ed9t t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean b\u1eadc cao h\u01a1n \u2014 v\u00e0 v\u00ec sao \u0111i qua m\u1ed9t <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/critical-speed\/\">t\u1ed1c \u0111\u1ed9 t\u1edbi h\u1ea1n<\/a> trong qu\u00e1 tr\u00ecnh ch\u1ea1y kh\u1edfi \u0111\u1ed9ng t\u1ea1o ra m\u1ed9t \u0111\u1ec9nh dao \u0111\u1ed9ng.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/vi\/glossary\/modal-analysis\/\">Ph\u00e2n t\u00edch m\u00f4 h\u00ecnh<\/a> and <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/ods-analysis\/\">Ph\u00e2n t\u00edch ODS<\/a>:<\/strong> nh\u1eefng k\u1ef9 thu\u1eadt n\u00e2ng cao n\u00e0y x\u00e1c \u0111\u1ecbnh v\u00e0 tr\u1ef1c quan h\u00f3a c\u00e1c h\u00ecnh d\u1ea1ng ch\u1ebf \u0111\u1ed9 g\u1eafn li\u1ec1n v\u1edbi c\u00e1c t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean kh\u00e1c nhau c\u1ee7a m\u1ed9t c\u1ea5u tr\u00fac. Ch\u1ebf \u0111\u1ed9 \u0111\u1ea7u ti\u00ean c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t ch\u1ebf \u0111\u1ed9 u\u1ed1n \u0111\u01a1n gi\u1ea3n, ch\u1ebf \u0111\u1ed9 th\u1ee9 hai l\u00e0 m\u1ed9t ch\u1ebf \u0111\u1ed9 xo\u1eafn, v\u00e0 ti\u1ebfp t\u1ee5c nh\u01b0 v\u1eady \u0111\u1ebfn c\u00e1c ch\u1ebf \u0111\u1ed9 b\u1eadc cao h\u01a1n.<\/li>\n<li><strong>Ph\u00e2n t\u00edch ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n (FEA):<\/strong> trong thi\u1ebft k\u1ebf, c\u00e1c k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng c\u00e1c m\u00f4 h\u00ecnh m\u00e1y t\u00ednh \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean v\u00e0 d\u1ea1ng ch\u1ebf \u0111\u1ed9. FEA chia m\u1ed9t c\u1ea5u tr\u00fac li\u00ean t\u1ee5c th\u00e0nh m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng h\u1eefu h\u1ea1n c\u00e1c ph\u1ea7n t\u1eed nh\u1ecf (m\u1ed9t l\u01b0\u1edbi), r\u1eddi r\u1ea1c h\u00f3a h\u1ec7 th\u1ed1ng \u2014 gi\u1ea3m n\u00f3 t\u1eeb DOF v\u00f4 h\u1ea1n xu\u1ed1ng m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng r\u1ea5t l\u1edbn nh\u01b0ng h\u1eefu h\u1ea1n m\u00e0 m\u1ed9t m\u00e1y t\u00ednh c\u00f3 th\u1ec3 th\u1ef1c s\u1ef1 gi\u1ea3i \u0111\u01b0\u1ee3c.<\/li>\n<\/ul>\n<p>M\u1ed9t nh\u00e0 ph\u00e2n t\u00edch l\u0129nh v\u1ef1c hi\u1ebfm khi \u0111\u1ebfm c\u00e1c b\u1eadc t\u1ef1 do m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng, nh\u01b0ng kh\u00e1i ni\u1ec7m n\u00e0y l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a c\u00f4ng vi\u1ec7c h\u00e0ng ng\u00e0y. N\u00f3 gi\u1ea3i th\u00edch t\u1ea1i sao c\u00e1c m\u00e1y m\u00f3c g\u1eb7p ph\u1ea3i nhi\u1ec1u v\u1ea5n \u0111\u1ec1 c\u1ed9ng h\u01b0\u1edfng thay v\u00ec m\u1ed9t v\u1ea5n \u0111\u1ec1, t\u1ea1i sao <a href=\"https:\/\/vibromera.eu\/vi\/glossary\/rotor-dynamics\/\">\u0111\u1ed9ng l\u1ef1c h\u1ecdc r\u00f4to<\/a> h\u00e0nh vi tr\u1edf n\u00ean phong ph\u00fa h\u01a1n khi t\u1ed1c \u0111\u1ed9 t\u0103ng l\u00ean, v\u00e0 t\u1ea1i sao c\u00e1c c\u00f4ng c\u1ee5 n\u00e2ng cao nh\u01b0 ph\u00e2n t\u00edch ph\u01b0\u01a1ng th\u1ee9c \u0111\u00f4i khi c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u1ea3i quy\u1ebft m\u1ed9t v\u1ea5n \u0111\u1ec1 rung \u0111\u1ed9ng c\u1ee9ng \u0111\u1ea7u. Khi nghi ng\u1edd v\u1ec1 c\u1ed9ng h\u01b0\u1edfng, m\u1ed9t b\u01b0\u1edbc th\u1ef1c t\u1ebf \u0111\u1ea7u ti\u00ean l\u00e0 \u01b0\u1edbc t\u00ednh n\u01a1i m\u1ed9t t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean n\u1eb1m t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u1ea1y; c\u1ee7a ch\u00fang t\u00f4i <a href=\"https:\/\/vibromera.eu\/vi\/calculators\/natural-frequency\/\">M\u00e1y t\u00ednh t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean<\/a> cho m\u1ed9t h\u1ec7 th\u1ed1ng kh\u1ed1i l\u01b0\u1ee3ng-l\u00f2 xo cung c\u1ea5p m\u1ed9t x\u1ea5p x\u1ec9 SDOF nhanh, trong khi <a href=\"https:\/\/vibromera.eu\/vi\/calculators\/rotor-critical-speed\/\">M\u00e1y t\u00ednh t\u1ed1c \u0111\u1ed9 t\u1edbi h\u1ea1n c\u1ee7a r\u00f4to<\/a> nh\u1eafm tr\u1ef1c ti\u1ebfp v\u00e0o c\u00e1c tr\u1ee5c. V\u00e0 tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng ph\u00e2n t\u00edch ph\u01b0\u01a1ng th\u1ee9c, \u0111i\u1ec1u \u0111\u00e1ng gi\u00e1 l\u00e0 lo\u1ea1i tr\u1eeb th\u1ee7 ph\u1ea1m t\u1ea7n s\u1ed1 \u0111\u01a1n l\u1ebb ph\u1ed5 bi\u1ebfn nh\u1ea5t \u2014 m\u1ea5t c\u00e2n b\u1eb1ng d\u01b0 l\u01b0\u1ee3ng \u2014 b\u1eb1ng m\u1ed9t c\u00f4ng c\u1ee5 di \u0111\u1ed9ng nh\u01b0 <a href=\"https:\/\/vibromera.eu\/vi\/san-pham\/balanset-1\/\">Balanset-1A<\/a>, \u0111o ph\u1ea3n \u1ee9ng 1\u00d7 trong c\u00e1c v\u00f2ng bi c\u1ee7a ch\u00ednh m\u00e1y v\u00e0 x\u00e1c nh\u1eadn li\u1ec7u v\u1ea5n \u0111\u1ec1 l\u00e0 k\u00edch th\u00edch c\u01b0\u1ee1ng b\u1ee9c hay c\u1ed9ng h\u01b0\u1edfng th\u1ef1c s\u1ef1 c\u1ee7a c\u1ea5u tr\u00fac.<\/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>Gi\u1ea3i th\u00edch v\u1ec1 B\u1eadc t\u1ef1 do (DOF), m\u1ed9t kh\u00e1i ni\u1ec7m m\u00f4 t\u1ea3 s\u1ed1 c\u00e1ch \u0111\u1ed9c l\u1eadp m\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 h\u1ecdc c\u00f3 th\u1ec3 di chuy\u1ec3n ho\u1eb7c rung \u0111\u1ed9ng.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-98","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/glossary\/98","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":1,"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/glossary\/98\/revisions"}],"predecessor-version":[{"id":101229,"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/glossary\/98\/revisions\/101229"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/media?parent=98"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/categories?post=98"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/vi\/wp-json\/wp\/v2\/tags?post=98"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}