The fuzzy PID gain conditioner: algorithm, architecture and FPGA implementation

In many control cases, we encounter the problem of tuning the coefficients of PID controllers. The often used methods such as the Ziegler-Nichols method can not guarantee to be the most effective one. This paper proposes a fuzzy PID gain conditioner algorithm (FPGA), a method based on the fuzzy control, which tunes the PID controller online. We probe into the VLSI architecture of the algorithm. The FPGA prototype implementation based on this VLSI structure is also given. Finally, a virtual control system is used to test the effectiveness of the design. The results obtained are encouraging.