(Solved):
Using the root locus to design a PD controller when the undamped natural frequency \( \omega_{n}= ...
Using the root locus to design a PD controller when the undamped natural frequency \( \omega_{n}= \) \( 0.5 \mathrm{rad} / \mathrm{sec} \), and damping ratio \( \xi=0.7 \) for the given unstable system. ( 20 points)