Ước lượng tham số cho các hệ thống điều khiển dựa trên phản hồi xung

Ling Xu1,2, Feng Ding2
1School of Internet of Things Technology, Wuxi Vocational Institute of Commerce, Wuxi, P. R. China
2School of Internet of Things Engineering, Jiangnan University, Wuxi, P. R. China

Tóm tắt

Tín hiệu xung là tín hiệu thay đổi tức thời trong thời gian rất ngắn. Nó được sử dụng rộng rãi trong xử lý tín hiệu, kỹ thuật điện tử, truyền thông và nhận diện hệ thống. Bài báo này xem xét các vấn đề ước lượng tham số cho các hệ thống động lực học bằng cách sử dụng các dữ liệu đo lường phản hồi xung. Do hàm chi phí có tính phi tuyến cao, các phương pháp tối ưu hóa phi tuyến được áp dụng để phát triển các thuật toán ước lượng tham số nhằm nâng cao độ chính xác ước lượng. Bằng cách sử dụng sơ đồ lặp lại, thuật toán lặp Newton và thuật toán lặp gradient được đề xuất để ước lượng các tham số của hệ thống động lực học. Ngoài ra, một yếu tố giảm chấn được giới thiệu để cải thiện độ ổn định của thuật toán. Cuối cùng, thông qua các ví dụ mô phỏng, bài báo này phân tích và so sánh những ưu điểm và hạn chế của các thuật toán đã đề xuất.

Từ khóa

#ước lượng tham số #phản hồi xung #hệ thống động lực học #tối ưu hóa phi tuyến #thuật toán lặp Newton #thuật toán lặp gradient #độ ổn định thuật toán

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