Question

Asked Dec 17, 2019

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1. Write down a transfer function of a stable system for which pure proportional feedback could drive the system unstable.

answer and explanation please!

Step 1

A system is said to be a stable system if the poles of the system lie on the negative real axis.

Let’s write the transfer system for a stable system. All the poles of this system will lie on the distinct points of the negative real axis. Such systems are stable in nature because they give a decaying oscillating signal in the output.

Step 2

Design a naegative feedback loop for the system and with the pure proportional feedback *K _{p}* as shown in the figure.

Step 3

The characteristic equation of th...

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