Which of the following statements is correct for any closed loop system?(a) All the co-efficient can have zero value(b) All the co-efficient are always non-zero(c) Only one of the static error co-efficient has a finite non-zero value(d) Only two of the static error co-efficient has a finite non-zero valueThis question was posed to me by my college director while I was bunking the class.This is a very interesting question from The Approximation of Higher-Order Systems by Lower-Order in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems

Which of the following statements is correct for any closed loop syste

1.	Which of the following statements is correct for any closed loop system?(a) All the co-efficient can have zero value(b) All the co-efficient are always non-zero(c) Only one of the static error co-efficient has a finite non-zero value(d) Only two of the static error co-efficient has a finite non-zero valueThis question was posed to me by my college director while I was bunking the class.This is a very interesting question from The Approximation of Higher-Order Systems by Lower-Order in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» The CORRECT ANSWER is (c) Only one of the static error co-efficient has a finite non-zero value Easy explanation: Closed loop SYSTEM has one of the static error CONSTANT for any input that can be POSITION, velocity or acceleration error constant.

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