Modelling and open-loop performance of a novel active suspension for a road vehicle

A two wheeled trailer with a novel active suspension is modelled in this paper. The behaviour of the active suspension system is investigated mathematically and experimentally. The prediction is in good agreement with the experiment. The isolation performance of the active suspension with constant input open-loop control was investigated by using the frequency response function. It is shown that a low natural frequency can be achieved by this suspension with improved inherent vibration isolation compared to a traditional passive suspension. The consistent prediction for the free vibration of the sprung body with the measured result tells us that the linearized equation can be employed for small amplitude vibration analysis of the prototype.