Papers by Author: Chen Bao Liu

Abstract: In the afterheat recovery process, the heat pump has high request to the heat-source water’s temperature stability. This article uses the method of temperature constant and frequency variable to guarantee the stability of heat-source water. However, the afterheat recovery system is a dynamic engineering system and the parameters of normal PID can not real-time tuning, it has bad Control effect. Therefore, this article combines fuzzy control and PID control to get a fuzzy PID controller with its parameters can be tuned to improve the adaptation ability for the time-varying of parameters. And we use it to improve the performance of steady and dynamic states for the controlled object. Modeling and simulating to the system by the Simulink and the fuzzy toolbox in the MATLAB and examining the control effect of the system.

Abstract: Using the Fuzzy PID’s control method into the servo control system and the PID parameters can be adjusted real-time according to the simulation results, which corrects the system. Increasing the adaptabilities for the parameters’ real-time changings to improve the controlled object’s steady and dynamic performance, the system’s control precision and the capability of anti-jamming. With the help of MATLAB's FUZZY toolbox, the system’s control performance is tested in the aspects of system modeling and simulation.