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  1. The time interval between a change in the input signal to a process control system and the response to the signal.
  2. The time interval, after a response to one signal or event, during which a system is unable to respond to another. Also known as insensitive time.


Related Terms

COMPUTER-CONTROLLED SYSTEM

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

DEAD-TIME COMPENSATION

The modification of a controller to allow for time delays between the input to a control system and the response to the signal.

FEEDBACK CIRCUIT

A circuit that returns a portion of the output signal of an electronic circuit or control system to the input of the circuit or system.

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.

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.

CONTROL ELEMENT

The portion of a feedback control system that acts on the process or machine being controlled. control hierarchy See hierarchical control.

AUTOMATIC-CONTROL STABILITY

The property of an automatic control system whose performance is such that the amplitude of transient oscillations decreases with time and the system reaches a steady state.

CLOSED LOOP

A control system that continually monitors the process, receives feedback of process changes, and then outputs corrections to a final control element to maintain a set point value.

AMPLIFIER

A device which enables an input signal to control power from a source independent of the signal and thus be capable of delivering an output which is greater than the input signal.

BASELINE DELAY

The time interval needed for the signal from a master station of a hyperbolic radionavigation system to travel the length of the baseline, introduced as a delay between transmission of the master and slave (or secondary) signals to make it possible to distinguish between the signals and to permit measurement of time differences.

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