control signal


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control signal

[kən′trōl ‚sig·nəl]
(computer science)
A set of pulses used to identify the channels to be followed by transferred data.
(control systems)
The signal applied to the device that makes corrective changes in a controlled process or machine.

Control Signal

 

a signal applied to a controlled object from a setting device or automatic controller and affecting the controlled variable of the object.

In some automatic control systems, control signals are altered to make the controlled variable correspond to the desired value (as in servomechanisms, stabilization systems, and programmed control) or achieve some optimum or extreme value (as in optimal control systems and self-aligning systems). In other automatic control systems, the control signal depends on the control law and is determined by the characteristics of the controlled object and the nature of commands and disturbances acting on the automatic control system.

Control signals may be applied in single-capacity or multiple-capacity systems. In the latter, each control signal may influence one or several controlled variables, which makes controlling the object more difficult. Thus, one of the most important problems to be solved in the design of automatic control systems is the lessening or elimination of the effect of the control signal on all but the desired controlled variable.

control signal

A pulse or frequency of electricity or light that represents a control command as it travels over a network, a computer channel or wireless. In the data communications world, control signals typically travel the same path as the data either as separate packets or contained within the data packets. In the traditional telephone communications world, control signals are sent over a separate network (see SS7). Contrast with data signal. See signal and signaling.
References in periodicals archive ?
Start to use energy use (in kWh/kg) as a process control signal
reconstruction of the traffic control signal at the intersection of Routes 6 & 202 (Lake Avenue Ext.
Any mechanical motion, such as the movement of arms or the fingers of a robot, could be translated to control signals.
Fast responding quartz lamps are said to heat up and cool down instantly in response to power control signals.