Closed-loop four wheel steering system having dual response rate

Details Closed-loop four wheel steering system having dual response rate Closed-loop four wheel steering system having dual response rate

1988-06-27

1989-05-09

Pekar, John A.

Motor vehicles

Compensating devices

180140, 180142, 36442405, B62D 504

Patent

active

048280615

ABSTRACT:
The driver steering inputs of a closed-loop reference model rear vehicle steering system are measured and subjected to a filter function that delays application of the measured input to the reference model. Externally generated steering inputs appearing in the parameters measured for closed-loop control are subjected to a different filter function which imparts only minimal delay of the signal transmission. As a result, the rear steer control responds at a first, relatively slow rate to driver steering inputs, and a second, relatively fast rate to externally generated disturbances.

REFERENCES:
patent: 4418780 (1983-12-01), Ito
patent: 4779693 (1988-10-01), Takahashi et al.
"A Variable Response Vehicle--Description and Applications" presented at the Joint Automatic Control Conference, Univ. of Texas, Jun. 19-21, 1974.
Four-Wheel Steering, Made in Japan, Automotive Industries, Aug. 1987.
Nissan Demonstrates its New 4Ws, Automotive News, Jun. 8, 1987.

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