ACTIVE VIBRATION CONTROL OF A QUARTER CARS MODEL USING PID CONTROLLED AIR SPRING
Keywords:
Air Spring, PID Control, Band Limited Noise, dynamic analysisAbstract
Air springs have been used to isolate vibrations and provide a comfortable ride to the passengers. It has been observed that high comfort can be provided by using air spring as secondary suspension system. In order to predict vibrations in the car body, a valid model of the air spring is needed. Since the experimental setup for dynamic analysis of air spring is time consuming, simulation via mathematical model is used to obtain the response behavior of the air spring. In this paper a linear quarter car model with air suspension system has been formulated. Here a comparative study among coil spring and linear air spring as suspension system has been done. A PID control algorithm has also been implemented for suspension system and responses have been obtained. Input provided to the quarter car model is band limited noise, given as road disturbance. The comparative study has depicted how a PID controlled linear air suspension model has been able to isolate the road disturbances to maximum extent.
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