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Comfortable Seat Suspension Design for Commercial Vehicles
Published May 12, 1998 by Institution of Mechanical Engineers in United Kingdom
In this paper, a limited bandwidth active suspension system has been employed for the development of a commercial vehicle driver seat suspension system. An eight-degrees-of-freedom tractor semi-trailer model representing driver seat, cab suspension system and tractor main suspension is introduced. The driver seat is supported by an actuator mounted on a linear spring while a shock absorber is connected between the driver seat and cab base. The data have been considered for widely used tractor semi-trailer vehicles. The road surface irregularities are represented as stationary Gaussian random excitation. Linear optimal control theory has been applied to obtain the feedback gains of the driver seat suspension controller with different frequency bandwidths. An optimization for the dynamic controller behavior is achieved considering the driver vertical acceleration and driver seat suspension working space in the system performance index. The generated results from the proposed system are compared with those obtained from the conventional passive one.