Question

___________has tendency to oscillate.

(a) Open loop system

(b) Closed loop system

(c) Open and closed loop systems have tendency to oscillate

(d) No Systems have tendency to oscillate

This question was posed to me at a job interview.

Enquiry is from Observer Systems in division State Variable Analysis and Design of Control Systems

Answer 1

Right answer is (a) Open loop system

The best explanation: Open loop control systems are the systems where the output cannot be the desired output and no feedback is used and gain of the system is very high due to this damping is very less and hence system has tendency to oscillate.