PROPORTIONALLY CONTROLLED THERMOCHEMICAL MECHANICAL ACTUATOR

PROPORTIONALLY CONTROLLED THERMOCHEMICAL MECHANICAL ACTUATOR

An operator selects an operating characteristic, such as a degree of extension or force of an extension member (66) of a thermal actuator (16), with an input circuit (10). The input control circuit generates a reference signal. A feedback circuit (18) monitors a characteristic of the thermal actuato...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: JAVOR, KENNETH, A, SCHNEIDER, EDWARD, T
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BLASTING
CONTROLLING
HEATING
LIGHTING
MACHINES OR ENGINES FOR LIQUIDS
MECHANICAL ENGINEERING
MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOTOTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISEPROVIDED FOR
OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
PHYSICS
PRODUCING MECHANICAL POWER
REGULATING
SPRING, WEIGHT, INERTIA OR LIKE MOTORS
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
WEAPONS
WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:An operator selects an operating characteristic, such as a degree of extension or force of an extension member (66) of a thermal actuator (16), with an input circuit (10). The input control circuit generates a reference signal. A feedback circuit (18) monitors a characteristic of the thermal actuator such as a temperature of its internal polymer, extension of the extension member, force, or the like, and generates a corresponding feedback signal. An error circuit (12) compares the reference and feedback signals and generates an error signal in accordance therewith. A dither circuit (30) generates an oscillating dither signal that is superimposed on one of the control and feedback signals before comparison by the error circuit. A power conversion circuit (14) adjusts an amount of electrical power supplied to a heating element (54) of the thermal actuator in accordance with the error signal.