Electricity: motive power systems – Positional servo systems – Vehicular guidance systems with single axis control
Patent
1987-12-24
1989-12-05
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Vehicular guidance systems with single axis control
318564, 318470, 244194, G05D 312
Patent
active
048855146
ABSTRACT:
An arrangement for controlling the position of a movable member, especially an aircraft control surface member, includes an operational amplifier and a capacitor connected in parallel to the amplifier. The control arrangement further includes a detector which detects the restoration of the supply of electric power following its interruption and generates a limited-duration pulse. This pulse is then used to close a switch, which is interposed between an input terminal of the capacitor and the ground, for the duration of this pulse, so that the capacitor is charged much more rapidly than otherwise. The output signal of the combination of the operational amplifier and the capacitor is supplied to an actuator for the movable member so that the extent of excursion of the movable member out of its desired position after the electric power supply has been restored is minimized.
REFERENCES:
patent: 4079902 (1978-03-01), Ryzhko et al.
patent: 4291260 (1981-09-01), Nixon
Adams Don L.
LaMontagne Troy J.
Novis Ari M.
Sivahop Albert
Bergmann Saul M
Ruzek Peter R.
Shoop Jr. William M.
United Technologies Corporation
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