Electricity: motive power systems – Positional servo systems – With compensating features
Patent
1982-03-22
1984-05-01
Dobeck, B.
Electricity: motive power systems
Positional servo systems
With compensating features
318561, 318615, 318327, G05D 23275
Patent
active
044464096
ABSTRACT:
An improved electronic control system employs a primary servomechanism loop which includes an error signalling difference node and a stability compensating forward gain/drive element intermediate an input command signal source and a controlled output element. A second, similar image feed back loop is operative upon a simulated representation of the controlled output element or plant, and is exercised by the input command source. The error node in the second image loop generates a loop error signal responsive to the difference between the input command and the simulated, predicted response for the controlled element.
In accordance with the present invention, the two error signals produced by the actual and image feed back loops are compared and generate a supplementary feed back signal which is summed with the plant-driving signal applied to the controlled element. Accordingly, the structure above considered operates to vitiate any difference between the error signals in the actual and image loops, thereby forcing the response of the controlled element to track the desired, predicted response therefor in the image loop notwithstanding any degredation experienced by the controlled plant.
REFERENCES:
patent: 4213175 (1980-07-01), Kurihara
patent: 4266168 (1983-05-01), Andersen
patent: 4366422 (1982-12-01), Rhodes
patent: 4368510 (1983-01-01), Anderson
Buntemeyer William R.
Rawicz Harris C.
Rizzo Vincent J.
Dobeck B.
Lockheed Electronics Co., Inc.
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