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Repetitive control and its application to linear servo unit for CNC machining of elliptical pistons

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4 Author(s)
Huixing Zhou ; Dept. of Precision Instrum., Tsinghua Univ., Beijing, China ; Linna Zhang ; Xiankui Wang ; Jinling Liu

In this paper, the basic theory of repetitive control are summarized and modified repetitive controllers are introduced. The steady-state error and asymptotic stability condition are presented. A CNC precision lathe implemented with the repetitive control system for machining elliptical pistons is constructed, which consists of a precision linear servomechanism, computer controlled repetitive controller and machine-tool. The cutting tool driven directly by the linear servomechanism in radial direction of the piston tracks the section curve of the piston. Compared with the machining results performed by a traditional piston CNC machine-tools with PID regular, the tracking error given by the proposed control method was reduced by 40%

Published in:

Industrial Technology, 1996. (ICIT '96), Proceedings of The IEEE International Conference on

Date of Conference:

2-6 Dec 1996