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1. A feedback system that consists of a sensing element, amplifier, and servomotor, used in the automatic control of a mechanical device.
2. A self-regulating feedback system or mechanism: "We do not need to know in detail how the minute chemical servomechanisms of the muscles operate in order to move our arms" (Harper's).
(Electrical Engineering) a mechanical or electromechanical system for control of the position or speed of an output transducer. Negative feedback is incorporated to minimize discrepancies between the output state and the input control setting
ser•vo•mech•an•ism(ˈsɜr voʊˌmɛk əˌnɪz əm, ˌsɜr voʊˈmɛk-)
an electronic control system in which a hydraulic, or other type of controlling mechanism is actuated and controlled by a low-energy signal.
ser`vo•me•chan′i•cal (-məˈkæn ɪ kəl) adj.
a closed-circuit feedback system used in the automatic control of machines, involving an error-sensor using a small amount of energy, an amplifier, and a servomotor dispensing large amounts of power. Also called servo. — servomechanical, adj.See also: Automation