A signal other than the reference input that tends to affect the value of controlled variable is known as(a) Disturbance(b) Command(c) Control element(d) Reference inputI got this question by my college director while I was bunking the class.This is a very interesting question from ConstructingPhase-Trajectories topic in division Nonlinear Systems of Control Systems

A signal other than the reference input that tends to affect the value

1.	A signal other than the reference input that tends to affect the value of controlled variable is known as(a) Disturbance(b) Command(c) Control element(d) Reference inputI got this question by my college director while I was bunking the class.This is a very interesting question from ConstructingPhase-Trajectories topic in division Nonlinear Systems of Control Systems
Answer» The CORRECT choice is (a) DISTURBANCE To explain: Disturbance signal is ALSO the reference signal only there can be multiple INPUTS in a control SYSTEM or the other input is called the disturbance signal.

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