Performance Monitoring and Data Driven PID Parameter Tuning for Noisy Systems

摘要

In industrial processes, it is necessary to maintain the user-specified control performance in order to achieve desired productivity. Many process control systems have the stochastic noise. For the noisy systems, the ordinary performance assessment method which based on the control error variance requires the long data windows, because the short data windows make the performance index oscillatory. The control performance deterioration can not be detected quickly by the long data windows. Moreover, the optimizations of FRIT for the steady state is difficult for the noisy systems, because of the high frequency component of the control error signal. In this paper, a performance monitoring method and a data driven PID parameter tuning method for the noisy systems are considered. Each approach effectively uses a low-pass filter. The effectiveness of the proposed schemes are verified by using a simulation example.