Assignment:
The block diagram of a control system is given below. The inner loop is positive feedback, i.e. Ks>0,and hence the system is unstable. Adding a P-D controller on the forward channel and a unity negative feedback, one can stabilize the system. Find:
1. The conditions of Kc and Tc to stabilize the system.
2. The value of Kc and Tc to let Mp=163% and ts=0.8, when Ks=0.8 .
