کنترل تطبیقی سیستم های غیرخطی تاخیردار با در نظر گرفتن محدودیت های خروجی
الموضوعات :
فاطمه محمدزمانی
1
,
مهناز هاشمی
2
,
غضنفر شاهقلیان
3
1 - دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
2 - دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
3 - دانشکده مهندسی برق، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
الکلمات المفتاحية: کنترل تطبیقی, قیود خروجی, سیستمهای غیرخطی تاخیردار, پارامترهای نامعین, عیوب عملگر,
ملخص المقالة :
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.
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