Study on Control Strategy for Abnormal Vibration of Carbody of High-speed Train Based on Secondary Lateral Active Suspension
To solve the problem of lateral abnormal vibration occurring in the real operation of high-speed trains,the study on the multi-objective vibration control based on the active lateral suspension has been carried out,the simplified lateral dynamic model for car system considering the lateral bending elastic mode of carbody has been built,the sliding mode surface and the control rate that takes into account both the lateral rigid body and elastic modal vibration characteristics of carbody has been designed,and the improvement effect of sliding mode control,ceiling control,and PID control strategies on the riding stability of car under shaking and vibrating conditions have been synthetically compared.The calculation result shows:the sliding mode control has an obviously better effect than PID control and ceiling control,can work under both car shaking and vibrating conditions,obviously improve the riding stability of car and restrain both low-frequency and high-frequency vibrations of carbody;besides the restriction of vibration acceleration,the sliding mode control can also restrain the lateral displacement of carbody to realize the simultaneous control of carbody displacement,speed and acceleration;the PID control is also effective under both car shaking and vibrating conditions,but its control effect is worse than that of the sliding mode control;the ceiling control can only work under the car shaking condition.
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