Self-tuning PID control of an electrohydraulic system

• Main Authors: Jia Rong Fan, 范嘉榮
• Other Authors: 王英才
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/41390827639405477735

碩士 === 國立臺灣科技大學 === 機械工程系 === 88 === The conventional controller design approach is difficult to obtain satisfactory control performance, because of the electro-hydraulic servo system is nonlinear time-variant system, the system parameters vary with the operating environment. To obtain batter performance a self-tuning PID controller is derived to control the driving force of a hydraulic cylinder. System parameters are estimated via a recursive least square technique, and the controller synthesis is achieved by using closed-loop pole placement method. The objective of this paper is to design a controller for force control of an electrohydraulic servo system by using self-tuning PID control theory. The effectiveness of this control technique was examined on a test rig and compared with a P controller. Also, the performance of the electrohydraulic servo system with P and self-tuning PID controller will be compared under different disturbance.