Digital servo system

Details Digital servo system Digital servo system

G - Physics

05

D

341/107, 318/25

G05D 3/00 (2006.01) G05B 19/39 (2006.01)

Patent

CA 1167141

F. W. Lin 3-1 DIGITAL SERVO SYSTEM A digital servo system adapted for use in a dual mode coarse-fine servo system to control a movable member from a starting position to an at rest destination position. The digital servo generates a pulse train in response to varying space phase cyclic analog position signal A from an encoder coupled to the movable member. Each cycle of an analog posi- tion signal represents a small incremental amount of movement by the movable member. The pulse train provides a change in its state in time with the varying position signals. In the pre- ferred embodiment, eight changes occur per cycle. The pulse train is integrated to provide a velocity signal which is compared with a command velocity signal. REP:llf

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