Constraining parameters with Sys ID Toolbox

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John F
John F 2014-11-6
回答： Arkadiy Turevskiy 2014-11-26
I'm trying to fit a TF model to some data, and I need the poles and zeros to be in the left-half plane. My better fits seem to have zeros in the right-half plane. Is there a way to restrict this?

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Arkadiy Turevskiy
Arkadiy Turevskiy 2014-11-26
You can specify the structure of a transfer function to estimate (the number of poles and zeros), and can specify that say all numerator coefficients should be positive. This will the absence of non-minimum phase zeros.
See this doc page . Search for the section "specify estimated transfer function model structure and coefficient constraints"

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