<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1815-5944</journal-id>
<journal-title><![CDATA[Ingeniería Mecánica]]></journal-title>
<abbrev-journal-title><![CDATA[Ingeniería Mecánica]]></abbrev-journal-title>
<issn>1815-5944</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería Mecánica. Instituto Superior Politécnico "José Antonio Echeverría"]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1815-59442019000100032</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Detección automática de defectos en pares engranados sin tacómetro]]></article-title>
<article-title xml:lang="en"><![CDATA[Tacho-less Automatic Gear Fault Detection]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz-Barrios]]></surname>
<given-names><![CDATA[Mario L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Montero]]></surname>
<given-names><![CDATA[Fidel E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palomino-Marín]]></surname>
<given-names><![CDATA[Evelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Mancilla]]></surname>
<given-names><![CDATA[Julio C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Hermanos Saíz Montes de Oca Facultad de Ciencias Técnicas ]]></institution>
<addr-line><![CDATA[ Pinar del Río]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Tecnológica de La Habana José Antonio Echeverría Facultad de Ingeniería en Telecomunicaciones y Electrónica ]]></institution>
<addr-line><![CDATA[ La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Tecnológica de La Habana José Antonio Echeverría Centro de Estudios en Ingeniería de Mantenimiento ]]></institution>
<addr-line><![CDATA[ La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Ingeniería Mecánica y Eléctrica ]]></institution>
<addr-line><![CDATA[ Ciudad México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<volume>22</volume>
<numero>1</numero>
<fpage>32</fpage>
<lpage>40</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1815-59442019000100032&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1815-59442019000100032&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1815-59442019000100032&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  En este trabajo se desarrolló y validó un método para detectar automáticamente defectos en pares engranados cuando la velocidad de rotación es desconocida y variable, sin usar tacómetro. En este método se usa la detección sincrónica de defectos basada en los amplificadores Lock-in (ALI) y un algoritmo para estimar automáticamente la velocidad de rotación. La estimación de la velocidad de rotación está basada en la descomposición de la señal de vibración en señales monocomponentes y el análisis del acoplamiento de fase no cuadrático. Con el método propuesto fue posible detectar un par engranadodefectuoso (con un diente roto) en una caja de engranajes de un aerogenerador de 3 MW. Este método puede ser aplicado con eficacia en condiciones de variación de la velocidad de rotación (&#8710;v) de hasta el 30 %, incluso cuando la relación señal-ruido (SNR) es baja.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this work, a method was developed and validated toautomatically detect gear fault when the rotational speed is unknown and variable, without using a tachometer. In this method are used the synchronous fault detection based on Lock-in amplifiers (LIA) and an algorithm for automatically estimating the rotation speed. The rotation speed estimation is based on the vibration signaldecomposition into monocomponent signals and the non-quadratic phase coupling analysis.With the proposed method was possible to detect a faulty gear (with broken tooth) in the gearbox of 3 MW wind turbine. This method can be effectively applied in conditions of rotation speed variation up to 30% even for low signal-to-noise ratio (SNR).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[diagnóstico de pares engranados]]></kwd>
<kwd lng="es"><![CDATA[amplificador lock-in]]></kwd>
<kwd lng="es"><![CDATA[modulación de amplitud]]></kwd>
<kwd lng="es"><![CDATA[Descomposición Singular del Espectro]]></kwd>
<kwd lng="en"><![CDATA[gear diagnostic]]></kwd>
<kwd lng="en"><![CDATA[lock-in amplifier]]></kwd>
<kwd lng="en"><![CDATA[amplitude modulation]]></kwd>
<kwd lng="en"><![CDATA[Singular Spectrum Decomposition]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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