Browse Publications Technical Papers 2019-01-1514
2019-06-05

A Study on Vibration Control of Sprung Mass in a Quarter Car Based on Sliding Mode Control with Disturbance Observer 2019-01-1514

To reduce the acceleration of the sprung mass, a method based on sliding mode control with disturbance observer is proposed for a quarter car control model with double-wishbone suspension. With balancing forces on the sprung mass in a quarter car control model, the second-order control system of a quarter car model is obtained. Due to the unknown information of road excitation displacement, the forces of suspension spring, damper and external disturbance in the second-order control system are estimated. A disturbance observer for unknown forces in a quarter car model is developed on basis of the sliding mode control (SMC) algorithm. Using the estimated values of the disturbance observer, the control force in a quarter car model with SMC is calculated. To validate the effectiveness of the proposed algorithm, an application example is presented. Under road excitation of the step displacement, the dynamic responses of a quarter car model with and without sliding mode control, and with Proportion Integration Differentiation (PID) control are calculated and analyzed. It is shown that the controlling performance of a quarter car model using SMC with disturbance observer is better than that of the PID control under the external disturbance force. The effects of the control parameter and external disturbance forces on the controlling performance is analyzed and investigated.To reduce the acceleration of the sprung mass, a method based on sliding mode control with disturbance observer is proposed for a quarter car control model with double-wishbone suspension. With balancing forces on the sprung mass in a quarter car control model, the second-order control system of a quarter car model is obtained. Due to the unknown information of road excitation displacement, the forces of suspension spring, damper and external disturbance in the second-order control system are estimated. A disturbance observer for unknown forces in a quarter car model is developed on basis of the sliding mode control (SMC) algorithm. Using the estimated values of the disturbance observer, the control force in a quarter car model with SMC is calculated. To validate the effectiveness of the proposed algorithm, an application example is presented. Under road excitation of the step displacement, the dynamic responses of a quarter car model with and without sliding mode control, and with Proportion Integration Differentiation (PID) control are calculated and analyzed. It is shown that the controlling performance of a quarter car model using SMC with disturbance observer is better than that of the PID control under the external disturbance force. The effects of the control parameter and external disturbance forces on the controlling performance is analyzed and investigated.

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