Question

In an open loop control system

(a) Output is independent of control input

(b) Output is dependent on control input

(c) Only system parameters have effect on the control output

(d) None of the mentioned

I had been asked this question at a job interview.

My question is taken from Open-Loop Transfer Function topic in portion Automatic Control of Machine Dynamics

Answer 1

Correct answer is (a) Output is independent of control input

To explain I would say: When the input to a system is independent of the output from the system, then the system is called an open-loop or unmonitored system.