error signal

error signal

[′er·ər ‚sig·nəl]
(control systems)
In an automatic control device, a signal whose magnitude and sign are used to correct the alignment between the controlling and the controlled elements.
(electricity)
(electronics)
A voltage that depends on the signal received from the target in a tracking system, having a polarity and magnitude dependent on the angle between the target and the center of the scanning beam.

error signal

A voltage whose magnitude is proportional to the difference between an actual and a desired position. In radar use, error signals are obtained from selsyns and automatic gain control circuits. The error signals are used to control servo systems, so that the resultant motions tend to correct the error.
References in periodicals archive ?
Laser system should include servo electronics that accept an error signal for locking the laser to an external reference.
When the adaptive filter output is equal to desired signal the error signal will become zero and echoed signal would be completely cancelled and the far user would not hear any echo noise during communication.
These signals are processed via electronic automation systems and depict the physical variation or error signal of the device or instrument being sensed.
ACO optimized PID controller is introduced in the system to modify the error signal and to produce a control signal so as to control the variations and fluctuations in frequency.
With an excitation coil and two detection coils configured as a three winding transformer, forming a classical four-arm bridge with two known impedances, the bridge differential error signal can be selectively amplified and can sensitively detect rail defects using a digital lock-in amplifier algorithm (17), (18).
Other benefits of the SmartBob AO include the output of a 22 mA error signal if the SmartBob AO should encounter a "stuck top" or "stuck bottom" condition and a soft start feature that reduces wear on the motor.
We define the a priori system error signal as difference between the output signal of the true system at time n, given by [y.
The fMRI studies demonstrated that when the control subjects made an error, the right caudate activated, sending them an error signal to rethink what they're, doing; the caudate did not alert the children with bipolar disorder or severe mood dysregulation.
The TD2 switch has all the features of the TDl switch but can also send a mA error signal to the control room.
From equation(3),we obtain the minimum norm condition[3] for the error signal that define the adaptive least squares tap weight coefficient vectorw(k) of adaptive linear combiner[2] which can be computed via back substitution.
Computation of the error signal is done by using (3)i.
Using Proportional Control Algorithm an error signal is computed to adjust the PWM controller duty cycle.