GATE EC 2019 Set 1 — Question 43
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Control Systems → State-Space Analysis → Transfer Function from States
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Question
Let the state-space representation of an LTI system be , , where are matrices, is a scalar, is the input to the system, and is its output. Let and . Which one of the following options for and will ensure that the transfer function of this LTI system is
Correct answer
(A) A = bmatrix 0 & 1 & 0 \ 0 & 0 & 1 \ -1 & -2 & -3 bmatrix and C = bmatrix 1 & 0 & 0 bmatrix
Solution
The given transfer function is . This is in the form where and .
In the controllable canonical form (CCF) with , the matrix is given by:The output matrix for a numerator of 1 is:This corresponds to option (A).
In the controllable canonical form (CCF) with , the matrix is given by:The output matrix for a numerator of 1 is:This corresponds to option (A).
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