Study on Operability and Riding Comfort for Truck Using an Active Seat Suspension : Experimental Considerations for One-Degree-of-Freedom Control System

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It is reasonable to apply the active suspension for driver's seat of a truck in order to improve riding comfort. However, as the vibration of the seat is decreased, the relative displacement between the seat frame and the cabin floor is increased and the operability of the truck is deteriorated. Thus the active seat suspension system should be designed taking into account of conflicting factor of the riding comfort and the operability. In this study, an active seat suspension system is developed taking into account of the trade off of these factors through experimental examination. The optimal control theory is applied in this study. In order to take into account of the riding comfort and the operability simultaneously, the acceleration of the seat frame and the relative displacement between the seat frame and the cabin floor are chosen as the weighted variables. The controller is designed so as to have the feedback link of the seat frame vibration and the feedforward link of the cabin floor vibration. To simulate an active seat suspension system on a truck cabin, an experimental driver's seat is mounted on a shaker realizing actual vibrations of the cabin floor of a truck. A DC servomotor and a ballscrew mechanism are equipped in parallel with the spring-damper assembly in the seat to control the suspension. Control experiments were carried out and control performances were examined. As a result, the developed active seat suspension system could achieve satisfactory performance on both of the riding comfort and the operability.
東海大学の論文

Study on Operability and Riding Comfort for Truck Using an Active Seat Suspension : Experimental Considerations for One-Degree-of-Freedom Control System

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