Research on RBF-PID Algorithm in electric control valve of cascade

As an important pressure regulating device in the cascade system, the electric control valve directly determines whether the entire cascade system can be economically and stably operated. The design performance of electric control valve includes many aspects, but the research on improving its control performance mainly focuses on control algorithm optimization. At present, the electric control valves in the cascade system are all using a single closed-loop PID control algorithm. However, the PID control algorithm has poor control effect on nonlinear and time-varying system. Therefore, this article proposes to use the RBF-PID control algorithm, which can adjust the PID control parameters online according to the input amount, to improve the control performance of the electric control valve. The simulation results show that the RBF-PID algorithm can control the system to enter the steady state more quickly, and the amplitude of the controlled pressure fluctuation is small. (authors)