fix impulse size for discrete-time impulse response#447
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bnavigator merged 2 commits intopython-control:masterfrom Dec 28, 2020
Merged
fix impulse size for discrete-time impulse response#447bnavigator merged 2 commits intopython-control:masterfrom
bnavigator merged 2 commits intopython-control:masterfrom
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merging #447, which did not fail in the PR tests, started to fail master after the merge, because `cont2discrete(..., 'impulse')` fails. Following NEP 29 we could even drop 3.6. But that is still active in distributions like openSUSE Leap 15.x, so I would like to keep that.
This was referenced Dec 29, 2020
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The input impulse used to drive the impulse response of a discrete-time system should be unit area rather than unit height. With this change, the discrete-time system's impulse response matches the cont-time systems's, if the discrete time system was sampled with 'impulse-equivalent' approximation according to:
sysd = sys.sample(0.1, 'impulse')A new unit test checks this.
(this is consistent with MATLAB behavior)
Update: rewrote summary, last version was written after a long work session and it shows : )