Integral Control
A control technique that accumulates the error signal over time, multiplies the sum by a user-specified gain factor Ki and uses the result as a corrective signal to the motion system. Since this technique also acts upon past errors, the correction factor does not go to zero as the following error, e, approaches zero allowing steady-state errors to be eliminated.
But the integral gain has an important negative side effect. It can be a destabilizing factor for the control loop. Large integral gains or integral gains used without proper damping could cause severe system oscillations. The contribution of integral gain to the control loop is limited by the integral saturation limit, Ks.
wever, as the following error, e, approaches zero, the proportional correction element, Kpe, disappears. This results in some amount of steady-state error.
Integral ControlA control technique that accumulates the error signal over time, multiplies the sum by a user-specified gain factor Ki and uses the result as a corrective signal to the motion system. Since this technique also acts upon past errors, the correction factor does not go to zero as the following error, e, approaches zero allowing steady-state errors to be eliminated.But the integral gain has an important negative side effect. It can be a destabilizing factor for the control loop. Large integral gains or integral gains used without proper damping could cause severe system oscillations. The contribution of integral gain to the control loop is limited by the integral saturation limit, Ks.wever, as the following error, e, approaches zero, the proportional correction element, Kpe, disappears. This results in some amount of steady-state error.
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