An integration design approach in PID controller

A hybrid PID controller that combining the Ziegler-Nichols PID controller with the grey prediction PID controller is proposed. The fuzzy gain scheduler is constructed to integrate these two controllers. Different characteristics of the employed controllers have been appropriately acquired. The advantage of the proposed control architecture is that the parameters of PID controllers do not need to adapt. Furthermore, the design scheme provides an easy way to design the PID controller. The goal of the first Ziegler-Nichols PID controller is designed with fast response. Usually, it can be obtained after using the Ziegler-Nichols tuning algorithms. The second grey prediction PID controller is operated in slow response. It can be easily achieved through scheduling the system output. The fuzzy gain scheduling has been successfully applied to emulating these two controllers. Simulation results exhibit the superiority of the proposed method over the conventional ones