Abstract:
Aiming at the problem of deteriorated hunting stability of metro vehicles during long-term service, this paper proposes a design method of an active control system based on centrifugal actuators. First, based on the working principle of centrifugal actuators, their installation layout and actuation mode on the bogie of metro vehicles were determined, and the diagonal dual-actuator configuration was finally adopted to realize the synchronous active suppression of bogie lateral displacement and yaw vibration. Then, the bogie end acceleration signal, which is convenient to measure in engineering practice, was used as feedback, and an active control system was designed by combining PID controller and Hilbert transform processing. The dynamic model and control system model were established by SIMPACK and Simulink respectively, and co-simulation analysis was carried out. The results show that the centrifugal actuator has good feasibility in controlling the hunting stability of metro vehicles. Compared with the bogie without active control, the root mean square (RMS) value of the bogie end acceleration is reduced by 29.65%. In the specially concerned frequency band of 0.5–10 Hz, the amplitude in the 2–5 Hz frequency band is significantly reduced. Among them, the amplitude of the power spectral density (PSD) at 4.8 Hz is the most significantly reduced, reaching 87.60%.