کنترل تطبیقی سیستم های غیرخطی تاخیردار با در نظر گرفتن محدودیت های خروجی

نوع مقاله: مقاله پژوهشی

نویسندگان

دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران

چکیده

کنترل سیستمها در فرآیندهای صنعتی در معرض مشکلاتی مثل وجود محدودیت بر سیگنالهای سیستم، نامعینی پارامترها، تأخیر زمانی
و عیب عملگرها هستند. طراحی کنترل کنندهای که بتواند درضمن ارضای قیود، سیستم را کنترل، با این اثرات مقابله و آنها را جبران کند، توجه
زیادی را به خود جلب کرده است. از سوی دیگر، مسئله تأخیر زمانی تا حدی جدی و تاثیرگذار است، که قادر اسهت سیستم را ناپایدار کرده و
فرآیند را دچار اختلال کند. بسیاری از ادوات موجود در سیستمها همچون حسگرها و عملگرها ممکن است دچار عیب شوند که در این میان،
عیوب عملگر از اهمیت ویژهای برخوردار است. نکته ی حائز اهمیت این است که، هر کدام از موارد فوق و یا حتی پارامترهای سیستم ممکن است
نامعین باشند. شناسایی، تخمین و رفع اثرات مخرب مشکلات ذکر شده بر عهده کنترل کننده سیستم میباشد.
روش کنترلی پیشنهادی برای سیستمهای غیرخطی در حضور نامعینی پارامتری، تاخیر و عیوب نامعین در عملگرها است و هیچ نیازی به کران
پارامترها، تاخیرها و عیوب عملگر ندارد. این روش تطبیقی قادر است کرانداری کلی تمام سیگنالهای سیستم حلقه بسته و همگرایی خطای
ردیابی به یک همسایگی کوچک حول مبدا را تضمین کند. در انتها نتایج شبیه سازی کارایی روش کنترلی پیشنهادی را نشان میدهند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Adaptive control of nonlinear time delay systems in the presence of output constraints

نویسندگان [English]

  • fatemeh mohammadzamani
  • mahnaz hashemi
  • ghazanfar shahgholian
University of Najafabad
چکیده [English]

Controlling systems in industrial processes are subject to problems such as the limitation of system signals, the
uncertainties of parameters, the time delay and the failure of actuators. The design of the controller, which can satisfy
the constraints, counteract and omit these effects, has attracted much attention.
On the other hand, the issue of time delay is so serious and effective, which can make the system unstable and disrupt
the process. Many of the devices in the systems, such as sensors and actuators, may be defective. The important thing is
that any of the above or even system parameters may be uncertain. Identifying, estimating and fixing the destructive
effects of the problems mentioned by the controller of the system.
The proposed method of control for nonlinear systems in the presence of an uncertain parameters, delay and faults in
actuators. There is no need to limit the parameters, delays, and fault of the actuators. This comparative method is
capable of guaranteeing the overall boundary of all closed-loop system signals and the convergence of tracking errors to
a small neighborhood around the origin. At the end, the simulation results show the effectiveness of the proposed
control method

کلیدواژه‌ها [English]

  • Output constraints
  • Nonlinear time delay systems
  • Adaptive control
  • Uncertain parameters
  • Actuator faults

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