{"id":311,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/windowing\/"},"modified":"2026-05-23T22:40:35","modified_gmt":"2026-05-23T22:40:35","slug":"windowing","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/windowing\/","title":{"rendered":"Ce este fenestrarea \u00een analiza FFT?"},"content":{"rendered":"<h1>\u00cen\u021belegerea ferestrelor \u00een analiza FFT<\/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\/ro\/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\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii 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=\"Balanset-1A kit complet \u2014 echilibrator portabil \u0219i analizor de vibra\u021bii\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii Balanset-1A\">Echilibrator portabil \u0219i analizor de vibra\u021bii 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Portable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201ePortable balancer &amp; Vibration analyzer Balanset-1A\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">\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=\"Prim-plan senzor de vibra\u021bii 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">Senzor de vibra\u021bii<\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Vibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201eVibration sensor\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu 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=\"Senzor optic (tahometru cu 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\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/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\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu laser)\">Senzor optic (tahometru cu 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Optical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201eOptical Sensor (Laser Tachometer)\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/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=\"Kit de echilibrare a rotorului Vibromera: geant\u0103 de transport, condi\u021bioner de semnal multicanal, analizor portabil, baz\u0103 magnetic\u0103, senzori de vibra\u021bii \u0219i cabluri spiralate.\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Balanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201eBalanset-4\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic 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=\"Baza magnetic\u0103.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, 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class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic Insize-60-kgf\">Stand magnetic 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" class=\"fas fa-cart-plus\" 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shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/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\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">\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=\"Band\u0103 reflectorizant\u0103\" 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, 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cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Reflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201eReflective tape\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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\/ro\/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\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &quot;Balanset-1A&quot; 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=\"Con\u021binutul kitului Balanset-1A cu unitate de interfa\u021b\u0103, senzori, tahometru \u0219i accesorii\" 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\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/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\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &quot;Balanset-1A&quot; OEM\">Echilibrator dinamic \"Balanset-1A\" 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> + TVA (dac\u0103 este cazul)<\/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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" 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=\"\/ro\/wp-json\/wp\/v2\/glossary\/311?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=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Dynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201eDynamic balancer \u201cBalanset-1A\u201d OEM\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/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><strong>Fereastrare<\/strong> este o etap\u0103 de procesare a semnalului \u00een care o func\u021bie matematic\u0103 de ponderare \u2014 o \u201efereastr\u0103\u201d \u2014 este aplicat\u0103 unui bloc de <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/time-waveform\/\">form\u0103 de und\u0103 de timp<\/a> datele \u00eenainte ca acestea s\u0103 fie transmise transformatei Fourier rapide. Forma ferestrei reduce treptat amplitudinea semnalului captat p\u00e2n\u0103 la zero la \u00eenceputul \u0219i la sf\u00e2r\u0219itul intervalului de timp, astfel \u00eenc\u00e2t datele se \u00eembin\u0103 f\u0103r\u0103 salturi bru\u0219te. Aceast\u0103 singur\u0103 opera\u021bie este cea care elimin\u0103 o eroare frecvent\u0103 numit\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/spectral-leakage\/\">scurgere spectral\u0103<\/a> \u0219i, prin urmare, este esen\u021bial pentru ob\u021binerea unui rezultat precis <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/spectrum\/\">spectrul de vibra\u021bii<\/a>. \u00cen practic\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration-analysis\/\">analiza vibra\u021biilor<\/a>, alegerea \u0219i aplicarea corect\u0103 a unei ferestre reprezint\u0103 diferen\u021ba dintre un spectru clar \u0219i de \u00eencredere \u0219i unul neclar \u0219i \u00een\u0219el\u0103tor.<\/p>\n<h2>1. Defini\u021bie: Ce este o func\u021bie de ferestre?<\/h2>\n<p>O func\u021bie de ferestre este un profil \u2014 un set de factori de multiplicare, c\u00e2te unul pentru fiecare e\u0219antion \u2014 care se aplic\u0103 peste blocul de timp brut. \u00cen punctele \u00een care valoarea ferestrei este 1,0, e\u0219antionul trece nemodificat; \u00een punctele \u00een care aceasta se apropie de 0,0, e\u0219antionul este atenuat. Deoarece aproape toate ferestrele ating valoarea maxim\u0103 \u00een mijloc \u0219i se reduc treptat la ambele capete, \u00eenmul\u021birea \u00eenregistr\u0103rii temporale cu func\u021bia de ferestre determin\u0103 ca fragmentul capturat s\u0103 \u00eenceap\u0103 \u0219i s\u0103 se termine la amplitudine zero. Matematica <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/fft\/\">FFT<\/a> r\u0103m\u00e2n neschimbate; aplicarea ferestrei doar precondi\u021bioneaz\u0103 datele, astfel \u00eenc\u00e2t ipotezele implicite ale transform\u0103rii s\u0103 fie \u00eendeplinite. \u00cen absen\u021ba acesteia, spectrul ob\u021binut de analizor poate fi eronat din punct de vedere cantitativ, chiar \u0219i atunci c\u00e2nd senzorul \u0219i restul lan\u021bului de m\u0103surare func\u021bioneaz\u0103 perfect.<\/p>\n<h2>2. Problema: scurgerea spectral\u0103<\/h2>\n<p>FFT porne\u0219te de la o ipotez\u0103 implicit\u0103: trateaz\u0103 blocul finit de date temporale pe care \u00eel analizeaz\u0103 ca <em>un ciclu complet al unui semnal perfect periodic care se repet\u0103 la nesf\u00e2r\u0219it<\/em>. Semnalele provenite de la echipamente reale nu respect\u0103 aproape niciodat\u0103 aceast\u0103 regul\u0103. Atunci c\u00e2nd \u00eenregistrarea \u00eencepe \u0219i se opre\u0219te \u00een momente aleatorii, sf\u00e2r\u0219itul blocului capturat nu se aliniaz\u0103 cu \u00eenceputul acestuia, astfel \u00eenc\u00e2t, atunci c\u00e2nd transformata FFT \u201e\u00eenf\u0103\u0219oar\u0103\u201d mental blocul pe sine, observ\u0103 discontinuit\u0103\u021bi bru\u0219te \u0219i artificiale la margini.<\/p>\n<p>Transformarea interpreteaz\u0103 aceste salturi bru\u0219te ca fiind un con\u021binut real de \u00eenalt\u0103 frecven\u021b\u0103 care nu exist\u0103 \u00een aparat. Energie care apar\u021bine cu adev\u0103rat unui singur element discret <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/frequency\/\">frecven\u0163\u0103<\/a> v\u00e2rful se extinde \u2014 se \u201escurge\u201d \u2014 \u00een intervalele de frecven\u021b\u0103 \u00eenvecinate de pe ambele p\u0103r\u021bi. Consecin\u021bele sunt de trei feluri:<\/p>\n<ul>\n<li><strong>Precizie redus\u0103 a amplitudinii:<\/strong> \u00een\u0103l\u021bimea m\u0103surat\u0103 a v\u00e2rfului este mai mic\u0103 dec\u00e2t valoarea sa real\u0103, deoarece energia acestuia s-a distribuit pe mai multe intervale, \u00een loc s\u0103 se concentreze \u00eentr-unul singur.<\/li>\n<li><strong>V\u00e2rfuri extinse:<\/strong> linia pare mai lat\u0103 \u0219i mai pu\u021bin bine conturat\u0103 dec\u00e2t ar justifica legile fizicii, ceea ce duce la o estimare imprecis\u0103 a frecven\u021bei.<\/li>\n<li><strong>Pierderea rezolu\u021biei:<\/strong> energia dispersat\u0103 ridic\u0103 nivelul de zgomot de fond \u00een jurul unui v\u00e2rf mare, ascunz\u00e2nd v\u00e2rfurile adiacente mai mici \u2014 exact cele mici <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/harmonics\/\">armonice<\/a> \u0219i benzile laterale care con\u021bin adesea informa\u021biile esen\u021biale pentru diagnostic.<\/li>\n<\/ul>\n<h2>3. Solu\u021bia: aplicarea unei ferestre<\/h2>\n<p>Func\u021bia de fereastr\u0103 remediaz\u0103 scurgerea spectral\u0103 oblig\u00e2nd lin semnalul s\u0103 devin\u0103 <em>look<\/em> periodic \u00een cadrul blocului. \u00cenmul\u021birea formei de und\u0103 brute cu fereastra reduce amplitudinile de la \u00eenceputul \u0219i sf\u00e2r\u0219itul extrem la zero, ceea ce elimin\u0103 discontinuit\u0103\u021bile de margine \u0219i, practic, induce \u00een eroare FFT-ul, f\u0103c\u00e2ndu-l s\u0103 perceap\u0103 un semnal continuu, f\u0103r\u0103 lacune. Rezultatul este un spectru vizibil mai curat:<\/p>\n<ul>\n<li>Precizia amplitudinii a fost \u00eembun\u0103t\u0103\u021bit\u0103 semnificativ, astfel \u00eenc\u00e2t \u00een\u0103l\u021bimile de v\u00e2rf pot fi considerate fiabile <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration-severity\/\">intensitatea vibra\u021biilor<\/a> limits.<\/li>\n<li>V\u00e2rfuri de frecven\u021b\u0103 mai clare \u0219i mai bine definite, care permit identificarea unei defec\u021biuni la un anumit ordin sau o anumit\u0103 component\u0103.<\/li>\n<li>Un nivel de zgomot de fond mai redus, care permite semnalelor slabe s\u0103 se disting\u0103 \u00een prezen\u021ba celor puternice.<\/li>\n<\/ul>\n<p>Exist\u0103, inevitabil, un compromis. Reducerea treptat\u0103 a capetelor duce la pierderea unei p\u0103r\u021bi din energia semnalului \u0219i la l\u0103rgirea u\u0219oar\u0103 a lobului spectral principal, astfel \u00eenc\u00e2t aplicarea ferestrelor implic\u0103 sacrificarea unei p\u0103r\u021bi din rezolu\u021bia \u00een frecven\u021b\u0103 \u00een schimbul unei reduceri semnificative a scurgerilor. Fiecare fereastr\u0103 reprezint\u0103 un punct diferit \u00een cadrul acestui compromis, motiv pentru care exist\u0103 mai multe forme de ferestre.<\/p>\n<h2>4. Tipuri comune de ferestre<\/h2>\n<p>Au fost concepute zeci de func\u021bii de ferestre, fiecare dintre ele ponder\u00e2nd intervalul de timp \u00eentr-un mod u\u0219or diferit. \u00cen cazul lucr\u0103rilor mecanice de uz general, una dintre ele predomin\u0103.<\/p>\n<h3>Fereastra Hanning<\/h3>\n<p>The <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/hanning-window\/\">Fereastra Hanning<\/a> (o curba de atenuare de tip \u201eraised-cosine\u201d) ofer\u0103 un compromis excelent \u00eentre rezolu\u021bia \u00een frecven\u021b\u0103 \u0219i precizia amplitudinii \u0219i reprezint\u0103 setarea implicit\u0103 recomandat\u0103 pentru aproape toate m\u0103sur\u0103torile standard ale vibra\u021biilor ma\u0219inilor rotative. Cu excep\u021bia cazului \u00een care exist\u0103 un motiv specific pentru a proceda altfel, ar trebui s\u0103 se opteze \u00eentotdeauna pentru fereastra Hanning. Aceasta este alegerea potrivit\u0103 pentru semnalele continue, cu periodicitate larg\u0103, care predomin\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/condition-monitoring\/\">monitorizarea st\u0103rii<\/a>.<\/p>\n<h3>Alte ferestre<\/h3>\n<ul>\n<li><strong>Fereastr\u0103 dreptunghiular\u0103 (denumit\u0103 \u0219i \u201eUniform\u201d sau \u201eNiciuna\u201d):<\/strong> echivalent cu lipsa complet\u0103 a unei ferestre. Aceasta ofer\u0103 cea mai bun\u0103 rezolu\u021bie \u00een frecven\u021b\u0103, dar prezint\u0103 cea mai mare scurgere spectral\u0103 \u0219i este adecvat\u0103 doar atunci c\u00e2nd se \u0219tie c\u0103 semnalul este perfect periodic \u00een interiorul blocului \u2014 sau atunci c\u00e2nd se \u00eenregistreaz\u0103 evenimente tranzitorii foarte bine definite \u0219i complet izolate, cum ar fi un impact.<\/li>\n<li><strong>Fereastr\u0103 Flattop:<\/strong> ofer\u0103 cea mai precis\u0103 m\u0103surare a amplitudinii dintre toate ferestrele obi\u0219nuite, \u00een schimbul unei rezolu\u021bii de frecven\u021b\u0103 foarte slabe (v\u00e2rfuri foarte largi). Este fereastra preferat\u0103 pentru lucr\u0103rile de calibrare \u0219i pentru orice sarcin\u0103 \u00een care este necesar\u0103 precizia exact\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/amplitude\/\">amplitudine<\/a> valoarea de v\u00e2rf a unui semnal conteaz\u0103 mai mult dec\u00e2t frecven\u021ba sa exact\u0103 \u2014 de exemplu, verificarea unui senzor \u00een raport cu un <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/calibration-certificate\/\">certificat de calibrare<\/a> pe o mas\u0103 vibrant\u0103 de referin\u021b\u0103 cunoscut\u0103.<\/li>\n<li><strong>Fereastra Hamming:<\/strong> str\u00e2ns legat\u0103 de fereastra Hanning, cu mici diferen\u021be \u00een ceea ce prive\u0219te comportamentul lobilor laterali; rar necesar\u0103 \u00een diagnosticarea de rutin\u0103 a utilajelor.<\/li>\n<\/ul>\n<h2>5. C\u00e2nd s\u0103 folose\u0219ti o fereastr\u0103 \u2014 \u0219i cum interac\u021bioneaz\u0103 aceasta cu rezolu\u021bia<\/h2>\n<p>\u00cen ceea ce prive\u0219te monitorizarea st\u0103rii utilajelor, regula este simpl\u0103: <strong>utiliza\u021bi \u00eentotdeauna o fereastr\u0103 Hanning<\/strong> pentru analiza spectral\u0103 general\u0103. Dezactivarea ferestrei \u2014 selectarea op\u021biunii \u201eRectangular\u201d pentru un semnal obi\u0219nuit \u00een curs de rulare \u2014 genereaz\u0103 date inexacte \u0219i poten\u021bial \u00een\u0219el\u0103toare, deoarece scurgerile vor distorsiona at\u00e2t \u00een\u0103l\u021bimile v\u00e2rfurilor, c\u00e2t \u0219i pragul aparent de zgomot. Instrumentele moderne aplic\u0103 implicit fereastra Hanning tocmai pentru c\u0103 aceasta este esen\u021bial\u0103 pentru ob\u021binerea unui spectru fiabil \u0219i precis.<\/p>\n<p>Func\u021bia de ferestre nu ac\u021bioneaz\u0103 singur\u0103. Deoarece efectul de conicitate l\u0103rge\u0219te fiecare linie spectral\u0103, rezolu\u021bia practic\u0103 \u00een frecven\u021b\u0103 pe care o ob\u021bine\u021bi este rezultatul combinat al alegerii ferestrei \u0219i al parametrilor de analiz\u0103 \u2014 lungimea blocului (num\u0103rul de e\u0219antioane), rata de e\u0219antionare \u0219i intervalul. Atunci c\u00e2nd v\u00e2rfurile sunt foarte apropiate \u00eentre ele, prelungirea intervalului de \u00eenregistrare le accentueaz\u0103 mai rapid dec\u00e2t schimbarea ferestrei; pute\u021bi vizualiza \u00een avans acest compromis cu ajutorul unui <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/fft-resolution-calculator\/\">Calculator pentru rezolu\u021bia FFT<\/a> \u00eenainte de a stabili configura\u021bia de m\u0103surare. De asemenea, aplicarea ferestrei este distinct\u0103 de \u0219i complementar\u0103 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/signal-filtering\/\">filtrarea semnalului<\/a>: un filtru elimin\u0103 benzile de frecven\u021b\u0103 nedorite din semnal, \u00een timp ce o fereastr\u0103 prelucreaz\u0103 banda r\u0103mas\u0103 astfel \u00eenc\u00e2t transformata Fourier rapid\u0103 (FFT) s\u0103 o poat\u0103 reprezenta fidel.<\/p>\n<h2>6. Aplicarea ferestrei pe teren<\/h2>\n<p>\u00cen cadrul diagnostic\u0103rii practice, fereastra este un element la care analistul rareori se g\u00e2nde\u0219te \u00een mod con\u0219tient \u2014 \u0219i asta este inten\u021bionat. Atunci c\u00e2nd un inginer \u00eenregistreaz\u0103 un spectru sau efectueaz\u0103 o opera\u021biune de echilibrare cu un instrument portabil cu dou\u0103 canale, cum ar fi <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a>, programul aplic\u0103 automat o fereastr\u0103 Hanning \u00eenainte de a calcula FFT, astfel \u00eenc\u00e2t 1\u00d7 <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/running-speed\/\">viteza de func\u021bionare<\/a> v\u00e2rful \u0219i armonicele sale apar la amplitudinea real\u0103 \u0219i la frecven\u021ba corect\u0103, f\u0103r\u0103 pa\u0219i suplimentari. Acest spectru corect ajustat este ceea ce permite aceluia\u0219i instrument s\u0103 disting\u0103 un semnal autentic <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a> v\u00e2rful de zgomotul din apropiere \u0219i s\u0103 verifice rezultatul dup\u0103 corectare. \u00cen\u021belegerea modului de func\u021bionare al ferestrei ajut\u0103 analistul s\u0103 recunoasc\u0103 momentele \u00een care o alegere diferit\u0103 de cea implicit\u0103 \u2014 \u201eFlattop\u201d pentru o verificare a calibr\u0103rii, \u201eRectangular\u201d pentru un tranzient curat \u2014 este cu adev\u0103rat justificat\u0103.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/\">\u2190 \u00cenapoi la indexul principal<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Un ghid pentru func\u021biile de fenestrare (precum Hanning) \u00een analiza FFT. Afla\u021bi de ce fenestrarea este esen\u021bial\u0103 pentru minimizarea scurgerilor spectrale \u0219i asigurarea m\u0103sur\u0103torilor precise ale vibra\u021biilor.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[114,109],"tags":[],"class_list":["post-311","glossary","type-glossary","status-publish","hentry","category-analysis","category-glossary"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/311\/revisions"}],"predecessor-version":[{"id":101322,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/311\/revisions\/101322"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}