بهینه‌سازی مقاوم کنترل وضعیت ماهواره با عملگر تراستر مبتنی بر تابع هدف ترکیبی

نوع مقاله: مقالة‌ تحقیقی‌ (پژوهشی‌)

نویسندگان

دانشکده مهندسی مکانیک دانشگاه تربیت مدرس

چکیده

در این مقاله، استفاده از الگوریتم بهینه‌سازی مقاوم برای طراحی سیستم کنترل وضعیت ماهواره، به منظور بهبود عملکرد آن تحت عدم قطعیت­، پیشنهاد شده است. در این راستا، یک ماهوراه تک محورۀ صلب باعملگر تراستر روشن-خاموش با اشمیت‌تریگر و PID در نظر گرفته شده است. عدم قطعیت‌های مدل شامل ممان اینرسی، سطح تراست، تأخیر زمانی خالص تراستر و دامنة اغتشاش خارجی است. تابع هدف بهینه‌سازی مقاوم، ترکیب وزنی میانگین قدر مطلق خطای نشانه‌روی و انحراف معیار آن در نظر گرفته شده است. نتایج حل عددی نشان می­دهد که روش بهینه‌سازی مقاوم در مقایسه با روش بهینه‌سازی معین از نظر مقاوم بودن، عملکرد سیستم کنترل وضعیت را در مواجهه با عدم قطعیت‌ها بهبود داده است.

کلیدواژه‌ها


عنوان مقاله [English]

Robust Optimization of Satellite Attitude Control with Thruster Actuators based on Combined Objective Function

نویسندگان [English]

  • Vahid Bohlouri
  • S.H Jalali-Naini
Tarbiat Modares University
چکیده [English]

his paper suggests arobust optimization algorithm for the design of the satellite attitude control system in order to increase the robustness of the performance under uncertainties. A single-axis on-off attitude control with rigid dynamics is considered using Schmitt-Trigger and PID controller. The model uncertainties include the moment of inertia, thrust level, thruster delay and theexternal disturbance amplitude.A weighted combination of expected value and standard deviation of pointing error is considered as an objective function for the robust optimization. The numerical solutions show that the robust optimization reduces the variations of the objective function, i.e. it increases the robustness of the system performance compared to the deterministic optimization.

کلیدواژه‌ها [English]

  • robust optimization
  • Satellite attitude control
  • Uncertainty
  • On-off thruster actuator

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