Adaptive vehicle suspension system with mechanism for varying co

Details Adaptive vehicle suspension system with mechanism for varying co Adaptive vehicle suspension system with mechanism for varying co

1993-03-04

1996-01-09

Park, Collin W.

Boots, shoes, and leggings

364148, 364151, 364157, 364165, 280707, 280 61, B60G 2500, G05B 1302

Patent

active

054834481

ABSTRACT:
An active suspension system uses a closed-loop feedback controller with tunable feedback gains to produce a control signal which minimizes a cost function formed by the weighted sum of system outputs including body acceleration and wheel displacement error. The feedback gains are adaptively varied by incremental amounts which are calculated based on the "pseudo-sensitivities" of those gains to system outputs, the pseudo-sensitivities being generated by a fixed-gain model of the suspension system and being combined using weighting factors which insure convergence in accordance with the predetermined cost function. The weighting factors are combined with the pseudo-sensitivities in a manner in which the trade-off between body acceleration, wheel displacement error and the control signal is altered with varying magnitudes of road inputs to continually minimize the cost function for varying road inputs. The adaptive control provides long-term compensation for varying road conditions, variations from vehicle-to-vehicle, and changes in vehicle performance.

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