Model free semi-active vehicle suspension system
AssigneeTenneco Automotive Operating Company Inc.
InventorsChristophe Lauwerys, Jan Swevers
Life of this patent
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Abstract
A method for controlling a shock absorber system of a vehicle that includes a plurality of controlled shock absorbers linearizes the system. The method includes transforming original control inputs of the shock absorbers into virtual damper force input signals based on a bilinear damper characteristic. The system dynamics are then decoupled into modal components using static decoupling matrices, and the system is controlled with a linear decentralized controller.
Claims18
A method of controlling a shock absorber system of a vehicle comprising a plurality of controlled shock absorbers, said method comprising:
- linearizing the system by transforming original control inputs of the shock absorbers into virtual damper force input signals based on a bilinear damper characteristic;
- decoupling system dynamics into modal components using static decoupling matrices that comprise the virtual damper force input signals to modal body accelerations of the vehicle;
- and
- controlling the system with a linear decentralized controller based on the modal components.
A semi-active shock absorber of a shock absorber system of a vehicle comprising:
- a cylinder;
- a rod inserted within said cylinder;
- a piston coupled to said rod;
- a controlled valve coupled to said cylinder;
- and
- a controller coupled to said controlled valve for controlling said valve, said controller comprising:
- a linear controller;
- a linearizing controller coupled to said linear controller, said linearizing controller based on a bilinear damper characteristic.
A shock absorber system of a vehicle comprising a plurality of controlled shock absorbers, said system comprising:
- means for linearizing the system by transforming control inputs of the shock absorbers into virtual damper force input signals based on a bilinear damper characteristic;
- means for decoupling system dynamics into modal components using static decoupling matrices that comprise the virtual damper force input signals to modal body accelerations of the vehicle;
- and
- means for controlling the system with a linear decentralized controller based on the modal components.
Dependencies are inferred from the claim text.