Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos
Patent
1980-02-29
1981-11-03
Truhe, J. V.
Electricity: motive power systems
Positional servo systems
Adaptive or optimizing systems including 'bang-bang' servos
318620, 318621, 318622, G05B 1300
Patent
active
042988330
ABSTRACT:
Apparatus for damping operator induced oscillations of a controlled system responding to an operator controlled signal (DEP) utilizing a lag-lead filter (14) for frequency and amplitude estimation of the control input, and a rectification and smoothing filter (16) for producing a signal proportional to the absolute value of the frequency and amplitude estimate for use in suppression of the control system output signal (DEC). In one embodiment, this is accomplished by computing a correction signal in a correction generating section (18). In a second embodiment, a second rectification and smoothing filter (21) produces a signal proportional to the absolute value of the controlled input signal. A ratio of the outputs of the first and second rectification and smoothing filters is then used in a generator (24) to generate a gain factor k.sub.q for the control system to reduce the gain of the output signal of the control system, thereby to provide a damped control output signal without rate limiting the controlled element.
REFERENCES:
patent: 3446946 (1969-05-01), Andeen
patent: 4030011 (1977-06-01), Hendrick et al.
Edwards John W.
Smith John W.
Indyk Eugene S.
Manning John R.
McCaul Paul F.
The United States of America as represented by the Administrator
Truhe J. V.
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