Can't use functions like sin(s) with transfer function/nyquist

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Sebastian Daneli 2019-8-3

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回答： Navya Seelam 2019-8-7

I'm trying to evaluate describing functions by plotting them with the nyquist command but it's not possible when a function like sin is a part of the describing function.

Any ideas?

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Navya Seelam 2019-8-7

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Hi,

nyquist function is based on an algorithm which computes the zero-pole-gain representation of the system. sin(s) cannot be converted to zero-pole-gain representation and hence it cannot be used with nyquist.