Method and circuit for the generation of a speed reference signa

Details Method and circuit for the generation of a speed reference signa Method and circuit for the generation of a speed reference signa

1980-12-08

1982-11-09

Dobeck, B.

Fluid-pressure and analogous brake systems

Pipeless valves

364426, G06F 1520

Patent

active

043581641

ABSTRACT:
It is known that a vehicle speed reference signal suitable for slip control can be obtained by fully releasing the braking force at one or more vehicle wheels intermittently and to obtain the true vehicle speed from the signal provided by the free-rotating wheels. However, this technique results in the stopping distance of the vehicle being longer than desired since the braking effectiveness is considerably reduced. To avoid this disadvantage, the present invention compares a speed reference signal cyclically with the instantaneous velocity signals of the wheels and to weight the comparison result dependent on whether the instantaneous velocity signal comes from a driven wheel or a non-driven wheel. The weighted comparison result provides a correcting factor for the speed reference signal.

REFERENCES:
patent: 4022513 (1977-05-01), Hirzel et al.
patent: 4037881 (1977-07-01), Fleagle

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