Abstract
In recent years, it is reported that passenger's dynamics and vibration characteristics to the multidirectional vibration at sitting position are difference from the driver. It have been reported so far that the many active suspension control logics can reduce the vibration of the vehicle. However there are few researches about the suspension control which considered these dynamics of human body characteristics and sitting position. It is very important to control the suspension system in consideration of them. In this paper, new active suspension control method is developed to reduce passenger’s vibration. Firstly, a vehicle and passenger system including the dynamics of human body at seated position is constructed. Next, the robust control system design which sets the vertical acceleration of a passenger’s head to one of the amounts of evaluation function is proposed. In order to verify the effectiveness of the proposed control system, the simulations are carried out by using a full vehicle model which has active suspension system. As the result, it was confirmed that in nearly the resonance frequency of a passenger’s head, the proposed control system is effective in reducing a passenger's vibration better than the general control system of having made vertical vehicles acceleration the evaluation function.
Keywords: Vehicle dynamics, Vibration control, Ride Comfort, Active suspension, Robust control, Passenger's dynamics