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Bibliographic Details
Main Author:	RICARDO A. VELÁSQUEZ V
Format:	Artículo científico
Language:	es
Published:	Universidad Nacional de Colombia 2007
Subjects:	Ingeniería Diagnóstico Redes neuronales Motor de inducción Fallas en estator Procesamiento digital de señales (DSP)
Online Access:	https://www.redalyc.org/articulo.oa?id=49615317
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Diseño y construcción de un prototipo digital para diagnósticar fallas en motores de inducción RICARDO A. VELÁSQUEZ V DIEGO R. CADAVID C FERNANDO VILLADA DUQUE Ingeniería Diagnóstico Redes neuronales Motor de inducción Fallas en estator Procesamiento digital de señales (DSP) En este trabajo se presenta el desarrollo de un prototipo digital utilizando un procesador de señalesdigitales DSP, al cual se le han incorporado dos algoritmos para diagnosticar fallas en el estator de motores deinducción. El primer algoritmo utiliza las redes neuronales artificiales para estimar la corriente de secuencianegativa, la cual es utilizada como indicador de falla. El segundo algoritmo utiliza la impedancia de secuenciainversa como indicador de falla. Se presenta la estructura general del prototipo y su implementación. Se incluyenlos resultados obtenidos experimentalmente en un motor de 3 HP utilizando medida en línea a través delprototipo digital 2007 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49615317 es http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.153 Vol.74

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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