Positioning control system

Details Positioning control system Positioning control system

1964-07-27

1981-01-13

Birmiel, Howard A.

Boots, shoes, and leggings

235 92MP, 318601, 364474, G05B 1921

Patent

active

042452970

ABSTRACT:
A mechanical element positioning control system. Position measuring means supply actual position and a computer supplies desired position as the least significant 11 bits of an 18 bit signal to corresponding digital to analog units, each comprising an 11 bit register and an 11 bit digital to analog converter. A differential amplifier compares the outputs of the digital to analog converters and generates a position error signal. A threshold circuit operates to complement the most significant bit of the D/A registers when exceeding of a maximum allowable analog error occurs. A servo system responsive to the position error signal positions the mechanical element to eliminate difference between desired and actual position. By eliminating the seven most significant bits representing desired and actual position, the total range is divided into 2.sup.7 separate fields so that D/A units of practical accuracy may be employed to make feasible a positioning control system of required accuracy and range.

REFERENCES:
patent: 3098995 (1963-07-01), Mundt
patent: 3112412 (1963-11-01), Dyer
patent: 3375354 (1968-03-01), McGarrell
patent: 3508251 (1970-04-01), Kelling

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