Four wheel steering system with closed-loop feedback and open-lo

Details Four wheel steering system with closed-loop feedback and open-lo Four wheel steering system with closed-loop feedback and open-lo

1988-06-27

1989-06-27

Pekar, John A.

Motor vehicles

Compensating devices

180140, 180142, 36442401, B62D 504

Patent

active

048420891

ABSTRACT:
An improved rear steering control system employing separate closed-loop feedback controller and open-loop feedforward control paths. The response characteristics of the open-loop and closed-loop control paths are separately scheduled to optimize the overall system performance. In particular, the authority and delay properties of the two paths are independently varied to achieve desired control objectives. As a result, the advantages of both open-loop and closed-loop control are achieved with a single control system.

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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