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http://dx.doi.org/10.7735/ksmte.2013.22.2.206

A Study on Synchronization Control Technique of Dual-Servo Press System  

Na, Sang-Gun (고려대학교 제어계측공학과)
Kwon, O-Shin (LG전자 CTO HAE 연구센터)
Kang, Jae-Hoon (한국기계연구원)
Heo, Hoon (고려대학교 제어계측공학과)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.22, no.2, 2013 , pp. 206-215 More about this Journal
Abstract
In this paper, a synchronization control technique of dual-servo motor driven press system is proposed. An independent cascade PID control technique has been applied to the conventional press system for advancement of control stability. However, it is not easy to reduce synchronous error using the independent cascade PID control technique when some different load disturbances are involved in each motor. The eccentric error of the slide caused by the problem degrade the control performance of the BDC(Bottom Dead Center). In order to achieve reduction of the synchronous error between two servo motors and accurate position control simultaneously, a new control scheme comprised with cascade PID control loop and cross-coupling loop is proposed. In simulation using Matlab SIMULINK, the AC servo system is designed. The control performance of proposed technique is compared with conventional control technique to the model of AC servo system. Also, the sub-scale model of dual-servo motor driven press system which can replicate the slide motion is constructed for experimental verification for the performance of the proposed control technique. The cross-coupling control technique reveals more precise and stable performances in the position and synchronization controls.
Keywords
Dual-servo motor driven press system; Cross-coupling control technique; Synchronous error; Synchronization control method; PID controller; Permanent magnet synchronous motor; Cascade control;
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