Generalized digital redesign method for linear feedback system based on N-delay control

Author

Fujimoto, Hiroshi ; Kawamura, Atsuo ; Tomizuka, Masayoshi

Author_Institution

Dept. of Electr. Eng., Tokyo Univ., Japan

Volume

4

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

101

Lastpage

109

Abstract

A new digital redesign method is proposed for feedback control systems, by which the states in the continuous-time system are completely reserved in the redesigned sampled-data system. The features of the proposed method are: 1) the N-delay control is employed, and the lth plant input is changed N_l times during one sampling period; 2) the states of the redesigned sampled-data system completely match those of the original continuous-time closed-loop system at every sampling period; and 3) the proposed redesign method can be applicable for a static state-feedback and/or a dynamic controller. An illustrative example of position control using a DC servo motor is presented. The advantages of the proposed redesign approach are demonstrated both in the time and frequency domains

Keywords

closed loop systems; control system synthesis; delays; digital control; feedback; linear systems; sampled data systems; DC servo motor; continuous-time closed-loop system; continuous-time system; dynamic controller; feedback control systems; frequency-domain synthesis; generalized digital redesign method; linear feedback system; multidelay control; position control; sampled-data system; static state-feedback; time-domain synthesis; Control systems; DC motors; Digital control; Feedback control; Linear feedback control systems; Position control; Sampling methods; Servomechanisms; Stability; State feedback;

fLanguage

English

Journal_Title

Mechatronics, IEEE/ASME Transactions on

Publisher

ieee

ISSN

1083-4435

Type

jour

DOI

10.1109/3516.769537

Filename

769537