Electricity: motive power systems – Positional servo systems – Antistatic friction features
Patent
1977-04-25
1978-08-01
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Antistatic friction features
318608, G05B 1101
Patent
active
041045726
ABSTRACT:
A servo system has a moving member supported for movement therein and a pickoff device for sensing the position of the moving member relative to a reference position. The pickoff provides a position output which is connected to an attenuator at the input of a high gain amplifier having a feedback loop for attaining gain stability. The feedback loop contains circuit components which provide stability in the servo system. An amplifier output attenuator reduces the feedback loop signal levels. Amplifier output is coupled to motive means for driving the moving member toward the reference position. A timing circuit produces a timed output which dissipates over a predetermined period of time. The timed output operates to enable a field effect transistor which causes the input divider to attentuate the position output to the high gain amplifier. An additional field effect transistor is enabled by the timed output and operates to temporarily remove the effect of the circuit components which provide servo system stability. A reduced frequency servo system oscillation results.
REFERENCES:
patent: 3797320 (1974-03-01), Clampitt
patent: 3939388 (1976-02-01), Abe et al.
patent: 3944907 (1976-03-01), Weit
Dobeck B.
Systron-Donner Corporation
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