Digital positioning systems having high accuracy

Details Digital positioning systems having high accuracy Digital positioning systems having high accuracy

1981-06-22

1984-01-31

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Multiple mode systems

318603, 318640, G05B 1118

Patent

active

044292678

ABSTRACT:
A digital positioning system having high accuracy is disclosed, which employs an incremental position optical encoder as the position transducer. In response to the output signal from the encoder, the system provides coarse and fine position signals which are combined to form a composite digital signal representing the absolute position of a moveable control member. The composite position signal has a resolution of greater than one part in one million. Trigonometric conversion techniques are used to derive high resolution incremental position information from the encoder output signals.

REFERENCES:
patent: 3020460 (1962-02-01), Morin et al.
patent: 3327101 (1967-06-01), Evans
patent: 3473098 (1969-10-01), Waller
patent: 3536979 (1970-10-01), Reuteler et al.

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