| Title |
Robust Servo System for Optical Disk Drive Systems |
| Authors |
박범호(Park Bum-Ho) ; 정정주(Chung Chung Choo) ; 백종식(Baek Jong-Shik) |
| Keywords |
Optical Disk Drive ; Coprime Factorization ; Zero Phase Error Tracking ; Track-Following Control ; Input Prediction System |
| Abstract |
This paper proposes a new and simple input prediction method for robust servo system. A robust tracking control system for optical disk drives was proposed recently based on both Coprime Factorization (CF) and Zero Phase Error Tracking (ZPET) control. The CF control system can be designed simply and systematically. Moreover, this system has not only stability but also robustness to parameter uncertainties and disturbance rejection capability. Since optical disk tracking servo system can detect only tracking error, it was proposed that the reference input signal for ZPET could be estimated from tracking errors. In this paper, we propose a new control structure for the ZPET controller. It requires less memory than the previously proposed method for the reference signal generation. Numerical simulation results show that the proposed method is effective. |