General PID Tuning Rules For Stable Second-order Plus Dead Time Processes A Model-based Approach

This research uses internal model control to develop PID tuning rules, called TSIMC, for stable second-order plus dead time processes. The proposed method is broadly applicable, easy to implement, and analytically motivated. The design objectives are set-point regulation, load disturbance rejection, degree of robustness, and input usage. Selecting the tuning parameter appropriately results in a well-balanced design between conflicting requirements. A number of illustrative examples are provided to demonstrate the satisfactory performance and robustness of the proposed approach. Then, the simulation results are compared to those of two well-known controllers, SIMC and iSIMC. The proposed methodology's key benefit is that TSIMC tuning rules are general and do not need to be modified, whereas SIMC and iSIMC tuning rules require modifications for particular processes. In fact, TSIMC may be used to tune any second-order plus dead time models, including pure time delay processes, any first-order plus dead time models, any integrating first-order plus dead time models, and double-integrating plus dead time models, with a single set of tuning rules.