Apparatus for generating linear and continuous positional error

Details Apparatus for generating linear and continuous positional error Apparatus for generating linear and continuous positional error

1976-11-17

1978-12-19

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

318608, 318616, 307261, G05B 1300

Patent

active

041307860

ABSTRACT:
A higher order servo system including a phase transducer which produces two triangular waveforms, phase displaced 90.degree. in relation to each other, representing the positions of a movable member, and a commutating circuit, responsive to the triangular waveforms, for generating a sawtooth waveform and a velocity signal which is linear and continuous over the whole range of movement of the member. A counter and converter, responsive to pulses also generated by the commutating circuit, generates a staircase waveform, representing predetermined positions of the member, which is added to the sawtooth waveform to produce a positional error signal which is linear and continuous over the whole range of movement of the member. Optimal velocity and acceleration signals are derived from these two linear and continuous signals to drive the member to a desired position over the shortest path, in the minimal amount of time, and with no oscillatory motion at the desired position.

REFERENCES:
patent: 3475626 (1969-10-01), Holzman et al.
patent: 3699555 (1972-10-01), DuVall
patent: 4059086 (1977-09-01), Cosksedge
patent: 4059789 (1977-11-01), Cocksedge

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