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

روش‌های هوشمند در صنعت برق

مقاله 1، دوره 10، شماره 40، بهمن 1398، صفحه 3-12   

نوع مقاله: مقاله پژوهشی

نویسندگان

فاطمه محمدزمانی؛ مهناز هاشمی^* ؛ غضنفر شاهقلیان

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

قیود خروجی؛ سیستمهای غیرخطی تاخیردار؛ کنترل تطبیقی؛ پارامترهای نامعین؛ عیوب عملگر

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