Study on PID control and Fuzzy-PID control of magnetic fluid semi-active suspension

摘要

Automotive semi-active suspension of adjustable damping force, under the control strategy based on real-time dynamic adjusting damping characteristics roads and cars, reducing vehicle vibration, in order to improve the vehicle comfort and stability. The magnetorheological (MR) damper is an ideal element for vehicle suspension semi-active control. In this paper, the MR damper is used as the adjustable damping force device, and the mechanical properties of the MR damper are obtained by the test, and the conventional PID control and Fuzzy-PID control are designed for the semi-active suspension respectively. To as random road excitation are simulated, the simulation results show that compared with the passive suspension, two control schemes are make the suspension performance has improved, but the Fuzzy-PID control of suspension performance improvement is better than PID control.