A practical control performance index and PID controller design

In the field of process control, there are cases where the control performance becomes inferior due to the change of surrounding environment. On the other hand, the best control performance is required from the viewpoint of high-quality and energy saving. Therefore, it is important to monitor the process state and evaluate the control performance. The scheme based on minimum variance control (MV-Index) has been proposed to evaluate control performance for deadbeat system. In the deadbeat system, evaluation is considered only step reference value. Therefore, in this paper, the evaluation is considered the reference trajectory specified by user. The effectiveness of the proposed method is verified by a simulation example.