کنترل تحمل‌پذیر عیب برای سیستم کنترل تحت‌شبکه چندنرخی با در نظر گرفتن تأخیر القایی طولانی

نوع مقاله : علمی-پژوهشی

نویسندگان

گروه برق- دانشکده فنی و مهندسی- دانشگاه شهید باهنر

چکیده

در این مقاله، یک روش جدید مدل‌سازی و کنترل تحمل‌پذیر عیب برای سیستم کنترل تحت‌شبکه چندنرخی با در نظر گرفتن تأخیر زمانی طولانی ارائه شده است. در ابتدا سیستم کنترل تحت‌شبکه چندنرخی به‌صورت یک سیستم سوئیچ‌شونده با زیرسیستم‌های خطی و یک سیگنال کلیدزنی تصادفی مدل شده است؛ که با در نظر گرفتن سیگنال کلیدزنی (ناشی از تأخیر القایی تصادفی) به‌صورت یک زنجیره مارکوف، مدل سیستم به‌صورت یک سیستم خطی پرشی مارکوف به‌دست می‌آید. سپس یک کنترل‌کننده دینامیکی فیدبک خروجی مستقل از مد، به‌گونه‌ای طراحی شده که سیستم حلقه‌بسته را پایدار نماید. در ادامه، باهدف تحمل‌پذیری سیستم در شرایط رخداد عیب عملگر (یا اغتشاش بار)، از یک عملگر مجازی استفاده می‌شود به‌طوری‌که بازپیکره‌بندی، بدون نیاز به تغییر در کنترل‌کننده اصلی انجام شود. در پایان، فرآیند چهار تانک برای ارزیابی روش‌های مدل‌سازی و کنترل پیشنهادی مورد استفاده قرار گرفته است.

کلیدواژه‌ها

عنوان مقاله [English]

Fault-Tolerant Control for Multi-rate Networked Control System with Considering Long Time Delay

نویسندگان [English]

  • K. Nekooei
  • M. Maghfoori Farsangi
  • M. Barkhordari Yazdi
Department of Electrical Engineering, Shahid Bahonar University, Kerman, Iran
چکیده [English]

In this paper, a new approach of modeling and fault-tolerant control is presented for multi-rate networked control system (MRNCS) with considering long time delay. Firstly, the MRNCS is modeled as a switched system with linear subsystems and a random switching signal. By considering the switching signal (as the result of random induced delay) as a Markov chain, the model of MRNCS is obtained as a Markovian jump linear system. Then a mode-independent dynamic output feedback controller is designed to stabilize the closed-loop system. In continuation, with the purpose of system tolerance against the actuator fault (or load disturbance), a virtual actuator is used so that the reconfiguration is performed without needing for any changes in the main controller. Finally, the quadruple-tank process is used to validate the proposed modeling and control approaches.

کلیدواژه‌ها [English]

  • Multi-rate networked control system (MRNCS)
  • Random time delay
  • Fault-tolerant control
  • Virtual actuator
  • Markovian jump linear system
  • Linear and bilinear matrix inequality
  • Mode-independent control

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