Tuning of PID Controller for Dead Time Processes Using an Immune-Based Multiobjective Approach

摘要

Dead time processes exist widely in many types of systems such as chemical and biomedical processes, and the main steam temperature control system of thermal power plants. Up to the present time, a PID Controller has been used to operate this system. However, it is very difficult to achieve an optimal PID gain with no experience, since the gain of the PID controller has to be manually tuned by trial and error. Conventional PID controllers, connected to these plants, are also tuned with a reduction of gain so that overall stability can be obtained. This results in poor performance of control. This paper suggests a tuning method of the PID Controller for steam temperature processes with long dead time using an immune-based multiobjective approach through computer simulation.