Rotation angle detecting apparatus and method of detecting...

Details Rotation angle detecting apparatus and method of detecting... Rotation angle detecting apparatus and method of detecting...

2007-02-06

2007-02-06

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Orientation or position

C702S142000, C073S504070, C324S701000, C318S661000, C318S667000, C318S799000, C318S571000

Reexamination Certificate

active

10776616

ABSTRACT:
A rotation angle detecting apparatus having a reference signal-generating device that generated a reference signal; a rotation angle detecting section that generated an output signal in response to the reference signal; a feedback control section that determines a rotational angular speed based on the output signal and performs feedback control to calculate a rotation angle; and a free-running range change device that narrows a free-running range of the rotational angular speed at a time of starting settling of the rotation angle. In the rotation angle detecting apparatus, the free-running range of the rotational angular speed at the time of starting the settling of the rotation angle is narrowed, whereby the settling time can be shortened. Accordingly, the time that elapses before it becomes possible to detect a rotation angle can be shortened correspondingly.

REFERENCES:
patent: 4305281 (1981-12-01), Lee et al.
patent: 4653315 (1987-03-01), Ament et al.
patent: 5003948 (1991-04-01), Churchill et al.
patent: 5027303 (1991-06-01), Witte
patent: 5587975 (1996-12-01), Kobayashi
patent: A 11-337371 (1999-12-01), None

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