| 摘要 |
An active suspension system for supporting a mass, such as a seat (12) on a base (16) of a vehicle includes a hydraulic actuator (18) coupled between the seat (12) and the base (16), an pneumatic off-load device (20) between the seat (12) and the base (16), and a control system which actively controls the hydraulic actuator (18) and which controls the off-load member (20). The control system actively controls the hydraulic actuator (18) as a function of a seat position error signal. The control system also controls the off-load member (20) as a function of a signal used in the active control of the actuator (18). A compressor (28) and a vent (30) are coupled to the pneumatic device (20) for controlling pressurization thereof. The control system comprises an electronic control unit (36) which repeatedly executes a control algorithm at a predetermined rate, and which controls the operational status of the compressor (28) and the vent (30) as a function of the position error signal and t he predetermined rate.
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