Question: A unity feedback system with loop transmittance [ mathrm{G}(s)=frac{mathrm{K}}{s(s+5)(s+20)} ] operates with approximately (55 %) peak overshoot and 0.5 seconds peak time when the gain

A unity feedback system with loop transmittance

\[
\mathrm{G}(s)=\frac{\mathrm{K}}{s(s+5)(s+20)}
\]

operates with approximately \(55 \%\) peak overshoot and 0.5 seconds peak time when the gain \(\mathrm{K}\) is adjusted to yield the velocity error coefficient \(\mathrm{K}_{v}=10\).

Use frequency response approach to design a PD compensator to reduce the peak overshoot to \(10 \%\) while keeping the peak time and the error coefficient about the same or less.

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