کنترل تحمل‏ پذیر عیب مود لغزشی مبتنی ‏بر مشاهده‏گر یادگیری تکرار شونده یک سیستم صلب-انعطاف‌پذیر در حضور اغتشاشات خارجی

نوع مقاله : مقاله مستقل

نویسندگان

1 استادیار، پژوهشگاه هوافضا (وزارت علوم، تحقیقات و فناوری)، تهران، ایران

2 کارشناسی ارشد، پژوهشگاه هوافضا (وزارت علوم، تحقیقات و فناوری)، تهران، ایران

چکیده

در این مقاله به طراحی الگوریتم‌ کنترل تحمل‏ پذیر عیب مبتنی ‏بر مشاهده‏ گر و کنترل فعال ارتعاشات به صورت همزمان جهت پایداری وضعیت فضاپیمای انعطاف ‏پذیر ناقص عملگر در قالب یک سیستم صلب-انعطاف‌پذیر که در معرض اغتشاشات خارجی قرار گرفته، پرداخته شده است. جهت تخمین خطای گشتاور ناشی از عیب عملگر، یک مشاهده‏ گر یادگیری تکرار شونده توسعه یافته است. یکی از ویژگی‌های اصلی این مشاهده‌گر خطا، لحاظ اغتشاشات خارجی در ساختار آن است. سپس، یک قانون کنترل تحمل ‏پذیر خطای مود لغزشی توسعه یافته مبتنی‏ بر ساختار تناسبی-انتگرالی-مشتقی با بهره سوئیچینگ متغیر با زمان برای تولید سیگنال‏ های کنترلی با عملکرد مطلوب طراحی شده است. در نهایت، جهت کاهش ارتعاشات باقی‏مانده حین و پس از مانور، الگوریتم کنترلی فیدبک نرخ کرنش به طور همزمان با الگوریتم کنترل تحمل‏ پذیر عیب فعال‏سازی می‏شود. تضمین پایداری کلی سیستم حلقه بسته با استفاده از تئوری لیاپانوف صورت پذیرفته است. شبیه ‏سازی‏های عددی در قالب یک مطالعه مقایسه‌ای حاکی از آن است که سیستم توسعه یافته عملکرد مطلوبی نسبت به الگوریتم‌های رایجی مانند‌ مود لغزشی انتگرالی در برابر خطای عملگر، اغتشاشات خارجی و تحریک مودهای انعطاف‌پذیر سیستم‌های با دینامیک صلب-انعطاف‌پذیر دارد.

کلیدواژه‌ها

موضوعات


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