Traditional Control Schemes

In this chapter we are going to discuss several other methods of control. These methods include PID (proportional-plus-integral-plus derivative) control, self-tuning control, self-tuning PID control, generalized predictive control, and also fuzzy logic control. One of the earliest controllers that were used for control were the PI and PID controllers. PI and PID controllers have been proven to be remarkably effective in regulating a wide range of processes. The use of PI and PID controllers does not require an exact process model and hence, they are effective on industrial processes whose models are considerably difficult to derive. The PI and PID controllers are based on classical control theory and much easier to understand. Field engineers and process operators are able to relate the parameter settings and control system actions.