Electricity: motive power systems – Positional servo systems – With stabilizing features
Patent
1989-03-17
1990-06-26
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
With stabilizing features
318561, 318609, 3185612, G05B 602
Patent
active
049375121
ABSTRACT:
A stability compensating circuit of a servomechanism wherein the output displacement of an actuator is controlled, comprising: a signal source generating a reference input signal corresponding to a target value; a first summing amplifier to which the reference input signal and a signal corresponding to the actual output displacement of the actuator are inputted; a primary amplifier to which an output of the first summing amplifier is inputted and which amplifies the output of the first summing amplifier; a secondary amplifier to which an output of the primary amplifier is inputted and which further amplifies the output; a second summing amplifier to which an output of the amplifier is inputted. The circuit further comprises a first order lag circuit to which the output of the primary amplifier is also inputted and which lags the output of the primary amplifier; and a differential circuit differentiating the signal corresponding to the actual output displacement of the actuator; and a third summing amplifier to which an output of the first order lag circuit and an output of the differential circuit are inputted and which transmits to the second amplifier the difference between the outputs of the first order lag circuit and the differential circuit; the second summing amplifier outputting the error between the output of the secondary amplifier and the difference, to control the output displacement of the actuator.
REFERENCES:
patent: 3199013 (1965-08-01), Brahm et al.
patent: 3555391 (1971-01-01), Younkin
patent: 4338659 (1982-07-01), Kuwahara
patent: 4396975 (1983-08-01), Kurahake
patent: 4833624 (1989-05-01), Kurahake
Bergmann Saul M.
Shoop Jr. William M.
Teijin Seiki Company Limited
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