Single zero, two poles, plus time delay transfer function in Simulink

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VR 2019-8-24

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回答： VR 2019-8-26

How do I enter a Single zero, two poles, plus time delay transfer function in Simulink. I need to have coefficients multiplying s. However, the zero-pole block in simulink will only let me enter the poles/zeros but not the coefficients for s.

The transfer function I need to simulate is [(0.08s + 1)*e^(-3s)]/ [(3s + 1)(s + 1)(0.4s + 1)(0.2s + 1)].

Thank you for your help

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Renato SL 2019-8-26

Do you absolutely have to define the whole transfer function with 1 atomic block?

Is using multiple atomic blocks acceptable?

VR 2019-8-26

I suppose it's acceptable, there is not specific restrictions for simulating the step response as long as the process gets the response. Thank you

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Answer 1

Renato SL 2019-8-26

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I am not sure if this work and I have not test it with your transfer function, but I would do something like this.

So, the Zero-Pole block is where you define the part of the transfer function without the exponential, and the Delay block will serve as the exponential part.

And of course, to improve the presentation of the blocks, maybe making it as a subsystem (maybe even plus an appropriate mask) would make it even nicer.