Performance evaluation of CD-ROM seeking control and auto-tuning of system parameters

• Main Author: 張振浩
• Other Authors: 陳永耀
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/16981416690806270407

碩士 === 國立臺灣大學 === 電機工程學研究所 === 89 === In the thesis, my study focuses is the evaluation of CD-ROM track seeking control performance and proposes a simple but efficient system identification method. In track seeking control, we use state feedback control that is based on Kalman filter and implement CD-ROM overall seeking action by self-designed circuits to achieve the target that reads data actually. A precise system parameter is most important for the estimated state by Kalman filter and the performance on seeking control. In CD-ROM dual actuator system, we take on-line system identification method that is based on system step response. Firstly, with the concern of sled actuator, we separate the constant friction force from the system dynamics. Secondly, in Fine actuator, we identify two-degree system model and successfully estimate the disk runout effect. Consequently, an accurate model of sled and fine actuators are derived by the concern on the complete system that includes disk effect.