Method of determining rotary speed of a rotating element in a br

Details Method of determining rotary speed of a rotating element in a br Method of determining rotary speed of a rotating element in a br

1985-09-03

1987-12-08

Gruber, Felix D.

Boots, shoes, and leggings

364426, 180197, B60K 3100, G01P 300, G06G 770/7/76

Patent

active

047121866

ABSTRACT:
A braking effort regulation system is improved by providing a rotary speed signal, which is accurate even under slow rotation conditions.
To obtain an accurate analog value of the rotary speed of a rotating object, typically the wheel of an automotive vehicle, from a transducer (1) having at least approximately sinusoidal output voltage, the transducer output voltage (u.sub.S, u.sub.S1) is converted into a digital signal (u.sub.S2), preferably filtered to obtain a filtered signal (u.sub.S3). The inverse function (y.sub.2 =arc sin (A.sub.o sin .omega.t)=c(.epsilon..sub.R 7.omega.t), y.sub.2 =arc sin (A.sub.o sin .omega.t) is then calculated. By differentiation and determination of the differential value of the signal y.sub.2, a signal (y.sub.R, y.sub.3) is then obtained which, after an additional preferably filtering step, will result in the desired speed-representative output signal (n.sub.R).

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patent: 4499543 (1985-02-01), Matsuda
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