PID control with model prediction

• Main Authors: I Hsu, 徐意
• Other Authors: Chyi Hwang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/31737062520578667128

碩士 === 義守大學 === 生物技術與化學工程研究所碩士班 === 96 === This paper is concerned with linear systems containing time delay in control.Time delay occurs frequently in process control problems. Compared to processes without delay, the presence of delay in processes greatly complicates the analytical aspects of control system design and makes satisfactory control more difficult to achieve.Smith proposed a delay compensation technique wbich utilizes a mathematical model of the process in the minor feedback loop around the conventional controller. But the Smith predictor structure cannot be used to control open loop unstable processes. by moving the P(D) part into an inner feedback loop an unstable or integrating process can be stabilized and the pole locations for a stable process can be modified.