طراحی یکپارچه تخمین‌گر عیب و کنترل‌کننده تحمل‌پذیر عیب برای سیستم‌های خطی پارامتر متغیر با عیب عملگری و حسگری
محورهای موضوعی : مهندسی برق و کامپیوتر
هوشنگ جعفری
1
( دانشگاه تربیت مدرس)
امین رمضانی
2
(دانشگاه تربیت مدرس)
مهدی فروزان فر
3
( دانشگاه آزاد اسلامی واحد اهواز)
کلید واژه: تخمین‌گر عیب, سیستم خطی پارامتر متغیر, کنترل‌کننده تحمل‌پذیر عیب, نامساوی ماتریس خطی,
چکیده مقاله :
وقوع عیب در سیستم‌های واقعی عملاً غیر قابل اجتناب بوده و می‌تواند باعث کاهش عملکرد و حتی واردشدن خسارت غیر قابل جبران مالی و جانی گردد. از این رو مداخله به‌موقع و سریع با اتخاذ تصمیم‌های مناسب به جهت جلوگیری از صدمات ناشی از عیب بسیار حیاتی است. همین امر استفاده از روش‌های کنترل تحمل‌پذیر عیب را برای جبران اثرات مخرب عیب در سیستم و افزایش قابلیتاطمینان و امنیت آن بسیار ضروری می‌نماید. در این مقاله روشی برای تخمین و کنترل وقوع عیب عملگری و حسگری به‌صورت هم‌زمان با استفاده از طراحییک تخمین‌گر عیب و کنترل‌کننده تحمل‌پذیر عیب به‌صورت یکپارچه برای سیستم‌های خطی متغیر با زمان ارائه گردیده است. در این روش از یک تخمین‌گر مبتنی بر رؤیتگر ورودی ناشناخته با کنترل‌کننده حالت و مد لغزشی به جهت اطمینان از پایداری مقاوم سیستم از طریق حل نامساوی ماتریس خطی استفاده شده است. روش ارائه‌شده، روییک سیستم خطی با پارامتر متغیر اعمال گردیده و نتایج شبیه‌سازی، مؤثربودن این روش برای تخمین عیوب و پایداری سیستم را نشان می‌دهد.
Fault occurrence in real operating systems usually is inevitable and it may lead to performance degradation or failure and requires to be meddled quickly by making appropriate decisions, otherwise, it could cause major catastrophe. This gives rise to strong demands for enhanced fault tolerant control to compensate the destructive effects and increase system reliability and safety in the presence of faults. In this paper, an approach for estimation and control of simultaneous actuator and sensor faults is presented by using integrated design of a fault estimation and fault tolerant control for time-varying linear systems. In this method, an unknown input observer-based fault estimation approach with both state feedback control and sliding mode control was developed to assure the closed-loop system's robust stability via solving a linear matrix inequality formulation. The presented method has been applied to a linear parameter varying system and the simulation results show the effectiveness of this method for fault estimation and system stability.
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