The study of accurate digital control for precision AC servo table

Author

Liu, Dong ; Mei, Xuesong ; Tao, Tao

Author_Institution

Sch. of Mech. Eng., Xi´´an Jiaotong Univ., Xi´´an, China

fYear

2009

fDate

9-12 Aug. 2009

Firstpage

503

Lastpage

507

Abstract

This paper presents a combined digital controller for precision AC servo table. The overall control structure consists of two parts: the feedback controller and feedforward compensator. The feedback controller designed with linear quadratic control of system error state space. And the system parameters are identified via the response of open-loop experiment. The feedforward compensator is used to compensate nonlinear Coulomb friction in this paper. The combined controller successfully was applied to trajectory tracking of precision servo table and the performance was compared with traditional PID control method on the experimental test.

Keywords

AC machines; boring machines; compensation; digital control; discrete time systems; feedback; feedforward; linear quadratic control; milling machines; open loop systems; parameter estimation; servomotors; state-space methods; digital control; discrete time system; feedback controller; feedforward compensator; linear quadratic control; nonlinear Coulomb friction compensation; open-loop experiment; precision AC servo table; system error state space; system parameter identification; trajectory tracking; Adaptive control; Control systems; Digital control; Error correction; Friction; Linear feedback control systems; Open loop systems; Servomechanisms; State-space methods; Trajectory; feedforward compensation; motion control; optimal control;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronics and Automation, 2009. ICMA 2009. International Conference on

Conference_Location

Changchun

Print_ISBN

978-1-4244-2692-8

Electronic_ISBN

978-1-4244-2693-5

Type

conf

DOI

10.1109/ICMA.2009.5246520

Filename

5246520