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A control system designed to follow a path calculated to be the optimal one to achieve a desired result.



Related Terms

CONTROL SPILLOVER

The excitation by an active control system of modes of motion that have been omitted from the control algorithm in the process of model reduction.

MINOR LOOP

A portion of a feedback control system that consists of a continuous network containing both forward elements and feedback elements.

AUTOMATIC CONTROL SYSTEM

A control system having one or more automatic controllers connected in closed loops with one or more processes. Also known as regulating system.

JUMP RESONANCE

A jump discontinuity occurring in the frequency response of a nonlinear closed-loop control system with saturation in the loop.

FEEDBACK COMPENSATION

Improvement of the response of a feedback control system by placing a compensator in the feedback path, in contrast to cascade compensation. Also known as parallel compensation.

CONTACTOR CONTROL SYSTEM

A feedback control system in which the control signal is a discontinuous function of the sensed error and may therefore assume one of a limited number of discrete values.

LOOP GAIN

  1. The ratio of the magnitude of the primary feedback signal in a feedback control system to the magnitude of the actuating signal. 2. Total usable power gain of a carrier terminal or two-wire repeater; maximum usable gain is determined by, and may not exceed, the losses in the closed path.

COMPENSATION

Introduction of additional equipment into a control system in order to reshape its root locus so as to improve system performance. Also known as stabilization.

AUTOMATIC-CONTROL ERROR COEFFICIENT

Three numerical quantities that are used as a measure of the steady-state errors of an automatic control system when the system is subjected to constant, ramp, or parabolic inputs.

COMPUTER-CONTROLLED SYSTEM

A feedback control system in which a computer operates on both the input signal and the feedback signal to effect control.

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