Semi-active suspension system with control circuit having a dire

Details Semi-active suspension system with control circuit having a dire Semi-active suspension system with control circuit having a dire

1997-07-08

2000-09-05

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

188318, F16F 934

Patent

active

06112866&

ABSTRACT:
The present invention relates to a semi-active damper controlled by a control circuit including a direct control loop made up of an inverse model of the damper. The inverse model of the damper determines an ideal value for an electrical current i.sub.th for controlling a compression controlled-restriction valve and an expansion controlled-restriction valve on the basis of a measured value for a relative speed y between the two ends of the damper and on the basis of a force reference value Fc. The semi-active damper of the invention is applicable as a transverse secondary suspension for a passenger rail vehicle.

REFERENCES:
patent: 4887699 (1989-12-01), Ivers et al.
patent: 4986393 (1991-01-01), Preukschat et al.
patent: 5024302 (1991-06-01), Karnopp
patent: 5337864 (1994-08-01), Sjostrom

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