علوم، فناوری و کاربردهای فضایی

علوم، فناوری و کاربردهای فضایی

کنترل تحمل‌پذیر خطای مود لغزشی انتگرالی تطبیقی فضاپیمای انعطاف‌پذیر مبتنی‌بر مشاهده‌گر اغتشاشات

نوع مقاله : مقاله پژوهشی

نویسندگان
پژوهشگاه هوافضا (وزارت علوم، تحقیقات و فناوری)
چکیده
در این مقاله به بهبود عملکرد کنترلی فضاپیمای انعطاف‌پذیر در مقابله با خطاهای عملگر، اغتشاشات داخلی و خارجی (شامل ارتعاشات پنل‌های انعطاف‌پذیر) و ورودی اشباع در طول مانورهای وضعیت پرداخته شده است. ابتدا، مشاهده‌گر اغتشاشات پیشنهادی جهت تخمین سرعت زاویه‌ای و اغتشاشات کلی سیستم (اغتشاشات ناشی از پنل‌های انعطاف‌پذیر و اغتشاشات خارجی) طراحی و توسعه داده شده است. سپس کنترل تحمل‌پذیر خطای مبتنی‌بر الگوریتم مود لغزشی انتگرالی با بهره‌ تطبیقی جهت تخمین کران بالای خطای عملگر با ورودی اشباع با لحاظ اثرات متقابل ناشی از دینامیک جسم صلب و انعطاف‌پذیر، توسعه یافته است. از طرف دیگر، کنترل تحمل‌پذیر خطا با پیشنهاد بهره تطبیقی در ساختار سطح لغزش توانایی رفع پدیده نامطلوب چترینگ را در سیستم دارد. پایداری کلی سیستم غیرخطی با استفاده از تئوری لیاپانوف اثبات شده است. همچنین، جهت کاهش ارتعاشات باقی‌مانده ناشی از برهم‌کنش دینامیک جسم صلب و انعطاف‌پذیر و اثرات خطا‌های عملگر، الگوریتم کنترل فعال فیدبک نرخ کرنش با استفاده از وصله‌های حسگر/عملگر پیزوالکتریک به طور همزمان در طول مانور وضعیت فعالسازی می‌شود. نتایج شبیه‌سازی‌ها در قالب یک مطالعه مقایسه‌ای با رویکردهای رایج، قابلیت و توانمندی رویکرد پیشنهادی در کاهش اثر اغتشاشات خارجی و داخلی را برای فضاپیمای انعطاف‌پذیر ناقص عملگر نشان می‌دهد.
کلیدواژه‌ها
موضوعات

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دوره 4، شماره 2
اسفند 1403
صفحه 1-13

  • تاریخ دریافت 06 فروردین 1403
  • تاریخ بازنگری 11 مرداد 1403
  • تاریخ پذیرش 30 آبان 1403