Document Type

Theses, Masters


This item is available under a Creative Commons License for non-commercial use only


This research was conducted primarily to investigate a selection of known methods for the identification of a mathematical model for processes with an inherent time delay, and subsequently, use the parameters of the identified model to regulate the processes via the PI/PID control strategy. The research examines the level of difficulty in performing or sanctioning different system identification methods in order to re-tune the controller. The process model identification methods are carried out on both simulated and real processes in the first part of the research. The selected parametric identification methods are chosen because they encompass open- and closed- loop techniques, first –order-plus-dead-time and second-order-plus-dead-time process models and both frequency- and time-domain identification methods. The second part of the research considers the PI/PID control strategy to regulate the processes identified using the aforementioned process model identification methods. The link between the identification and control sections in this thesis is the tuning rule. Even though the PID control loop is the most common industrial controller, poor tuning has contributed to the control loop not working as well as it should. The thesis considers the level of expertise required and the complexity of implementing eleven representative tuning rules using different PID controller structures