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1. (WO2009123792) LOADING AND UNLOADING STABILIZATION IN AN ACTIVE SUSPENSION SYSTEM

Pub. No.:    WO/2009/123792    International Application No.:    PCT/US2009/033654
Publication Date: Oct 8, 2009 International Filing Date: Feb 10, 2009
IPC: B60N 2/50
Applicants: BOSE CORPORATION
PARISON, James, A., JR.
SANGERMANO, Antonio, II
XU, Yongkai
Inventors: PARISON, James, A., JR.
SANGERMANO, Antonio, II
XU, Yongkai
Title: LOADING AND UNLOADING STABILIZATION IN AN ACTIVE SUSPENSION SYSTEM
Abstract:
An active suspension system (10) includes a relative slow-responding force bias eliminator (14) (such as a pneumatic actuator) and a relatively fast-responding actuator (12) (such as an electromagnetic actuator) that together support a plant (16) (such as a truck seat or vehicle cabin). The system also includes a load-unload detector (28) (which may be a physical or virtual detector) to detect a loading or unloading of the plant (16). When such a loading or unloading is detected, the system causes the force bias eliminator (14) to respond quickly (e.g., as quick as possible) while controlling the fast-responding actuator (12) so as to preserve the available energy for operating the actuator (e.g., so as to keep the fast-responding actuator from consuming all of its available energy) prior to when the force bias eliminator can respond.