Non-linear dynamic compensation system

Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos

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318632, 318626, 318620, 318611, G05B 1300

Patent

active

051190036

ABSTRACT:
A non-linear dynamic compensation subsystem is added in the feedback loop of a high precision optical mirror positioning control system to smoothly alter the control system response bandwidth from a relatively wide response bandwidth optimized for speed of control system response to a bandwidth sufficiently narrow to reduce position errors resulting from the quantization noise inherent in the inductosyn used to measure mirror position. The non-linear dynamic compensation system includes a limiter for limiting the error signal within preselected limits, a compensator for modifying the limiter output to achieve the reduced bandwidth response, and an adder for combining the modified error signal with the difference between the limited and unlimited error signals. The adder output is applied to control system motor so that the system response is optimized for accuracy when the error signal is within the preselected limits, optimized for speed of response when the error signal is substantially beyond the preselected limits and smoothly varied therebetween as the error signal approaches the preselected limits.

REFERENCES:
patent: 4338659 (1982-07-01), Kurakake
patent: 4801857 (1989-01-01), Bundy

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