Due to the large effective inner loop gain
of this hybrid expansion valve, superheat control of a single evaporator was greatly improved.
However, the gain of the open loop control system is adjusted by a feedback control of the frequency signal, so that the whole open loop gain
crosses the 0 dB point at the desired switching frequency.
The locking range of the Miller FD is still determined by the loop gain
limitation, and it can be derived as
A low value resistive load will lower the available loop gain
of the amplifier and create a measurement error.
Then the changes on the loop gain
will affect numerator and denominator of the feed-back system function, so the phase noise result will be constant.
is an engineering term that is used to describe stability or instability in a negative feedback control system (113-115).
The non-linear open loop gain
of the amplifiers introduces error components as harmonic distortion in the modulator output spectrum.
Perhaps this particular opamp was chosen for its high open loop gain
The condition for oscillations in a negative feedback loop is that the loop gain
be -1 or:
Abstract: One of the most important factors which influences the dynamical behavior of the feed drives for numerically controlled machine tools is position loop gain
This circuit will oscillate if there is a positive loop gain
at a frequency where the open loop phase shift is a multiple of 2[pi].
With much of the lag eliminated in the system, the loop gain
is higher, causing the control to respond to the [O.
The increased shunt resistance will result in smaller closed-loop voltage-gain and higher loop gain
The system needs to be tuned, for instance, by increasing the loop gain
With the loop gain
of 200, an open-loop error of 100 MHz is corrected to 0.