How to impose 'Second Order Approximation'?

How would I impose 'Second Order Approximation' to the system below?

Answers (1)

The only possibility that comes to mind in my experience is to take it back to the time domain and calculate a second-order Taylor series representation of it. (That’s usually done for nonlinear systems in order to linearise them, but yours seems to me to be linear.)

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Asked:

on 10 Dec 2014

Commented:

on 13 Nov 2016

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