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cnpcshangbo / OS4_FOC

OS4 fractional order controller
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How to check discrete-time stability? #14

Open cnpcshangbo opened 6 years ago

cnpcshangbo commented 6 years ago

http://www.dcsc.tudelft.nl/~sc4060/transp/discreteNOTES.pdf image

cnpcshangbo commented 6 years ago

A pole near the imaginary pole causes this kind of vibration. image

cnpcshangbo commented 6 years ago

This piece of code tells how to calculate the discrete system poles. https://github.com/cnpcshangbo/OS4_FOC/blob/486c16c172f2f417ed398f5aa06d89f8e7f48c06/IRID/phiz_cal.m

cnpcshangbo commented 5 years ago

References: A book about pole-zero analysis https://www.scribd.com/document/271759125/System-Dynamics-An-Introduction-pdf 12.4.1 Pole-zero plot