Optimum Feedback Amplifier Design for control system

iyahsue · 发表于 2008-4-15 01:11:23

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Optimum Feedback Amplifier Design
For Control Systems
Abstract:
Many designers think of control system feedback loop compensation only in
terms of stable or unstable. In reality, there is an optimum error amplifier
transfer function for any given loop crossover frequency and phase margin.
The optimum design is shown to be the one with the highest gain below
crossover and the lowest gain above crossover. There is a unique pole-zero
placement to achieve optimum performance. This pole-zero placement and
resultant circuit component values can be determined without trail-and-error.
In addition, there is an optimum open loop crossover frequency (loop
bandwidth) or any given phase margin.