Abstract:

Abstract:For large delay control systems, traditional PID control can not achieve desired control effect, and because of the complex structure, too many parameters, large online computing workload and unclear correspondence between the parameter meaning and actual system, the predictive control method is difficult to be accepted by the engineering staff. Combining the advantages of the PID control and the predictive control, a PID predictive control method was proposed. The method needs less computing workload, it is easy to be used in engineering practice and has better control effect. A simulation research of the method used in controlled object with large delay was carried out. The research result shows that using the PID predictive control method, the control problem of large delay system can be solved effectively, and the system control quality can be improved.

Key words: Keywords:large time delay, PID control, predictive control, robustness