New methods for process identification and design of feedback controller

New methods for identification of a process and the design of a feedback controller are proposed. In the process identification, the predictive model consists of a second-order transfer function plus time delay, and the related parameters are evaluated from open-loop response. The feedback controller considered includes a PID controller and a standard lead-lag. The controller parameters are easily evaluated from the parameters of the process model. The method of tuning is illustrated by applying it to a number of systems, and the results are compared to those obtained using the previous methods.