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Nyquist stability test using stb analysis

DCashen

I'd like to do a Nyquist test for stability. I can generate a Nyquist plot from the loop gain analysis. That'll give me the number of encirclements of -1. Now I need the poles of the loop gain. Is there a way to extract that from the stb results?

Thanks

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  • DCashen

    Hi Andrew,

    I forgot to ask. In formatting the stb results for generating the Nyquist plot we need to multiple the real portion by -1. I wouldn't have realized to do this without viewing the video on creating a Nyquist plot. Why do we need to multiple the result by -1?

    Thanks again

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  • DCashen

    Hi Andrew,

    I forgot to ask. In formatting the stb results for generating the Nyquist plot we need to multiple the real portion by -1. I wouldn't have realized to do this without viewing the video on creating a Nyquist plot. Why do we need to multiple the result by -1?

    Thanks again

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