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Title: bandwidth feature by SCLiao47 · Pull Request #889 · python-control/python-control · GitHub

Open Graph Title: bandwidth feature by SCLiao47 · Pull Request #889 · python-control/python-control

X Title: bandwidth feature by SCLiao47 · Pull Request #889 · python-control/python-control

Description: As discussed in #690, the bandwidth feature is added to the LTI class. Implementation: The range of possible frequency is extracted from freqplot._default_frequency_range. The index, $idx$, is identified, which corresponds to the first frequency dropped by a desired amount relative to the DC gain. Bisection search (scipy.optimize.root_scalar) is used to solve for the bandwidth in the frequency bracket $[\omega[idx-1], \omega[idx]]$. Notes: The bandwidth of a system with infinite DC gain is set to be np.nan, which follows the convention of Matlab. The above approach is chosen to solve the bandwidth instead of the scipy.optimize.root suggested in issue #690. The suggested approach requires an initial guess and might fail, e.g., a system with a resonant peak at a frequency higher than the bandwidth. Notes on git commits: git commits are duplicated as I was having some issues to push. I pulled (suggested by git error hint), and it prompts "merge made by the 'recursive' strategy. Not sure whether this is a problem.

Open Graph Description: As discussed in #690, the bandwidth feature is added to the LTI class. Implementation: The range of possible frequency is extracted from freqplot._default_frequency_range. The index, $idx$, is ide...

X Description: As discussed in #690, the bandwidth feature is added to the LTI class. Implementation: The range of possible frequency is extracted from freqplot._default_frequency_range. The index, $idx$, is ide...

Opengraph URL: https://github.com/python-control/python-control/pull/889

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65988d1 solve bandwidth by bisection for zero-crossing SCLiao47 Apr 28, 2023 https://github.com/python-control/python-control/pull/889/commits/65988d12cbab5d895767da195a3767d922b1bb6e
86ff95c testing suggested method by Kreijstal SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/86ff95c47f648dc859cfab61c8972eeccbd1039b
70e912f Implemented and passed nominal test SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/70e912f031574167eef683f090dbb59317dff6ac
0c81cb2 Handle integrator, all-pass filters SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/0c81cb2b9812932096fd7d68c80b1457a02ef083
d59d19a adjust for PEP8 coding style SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/d59d19a299d2455e35826f6206715bba6197274c
bc2ddff solve bandwidth by bisection for zero-crossing SCLiao47 Apr 28, 2023 https://github.com/python-control/python-control/pull/889/commits/bc2ddff637169cea8010794cae7b2488ffa16006
409d0c6 testing suggested method by Kreijstal SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/409d0c62dd7c940d1d5575af229a31fc526e5f90
723ddc8 Implemented and passed nominal test SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/723ddc88781912e858887cdec93154d8c9e26466
6b51432 Handle integrator, all-pass filters SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/6b5143236212bf5d9ab4c3fdf82c6299a3e27e55
9f86b41 adjust for PEP8 coding style SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/9f86b41c21e9d81b93921892f875d5940e9da4c8
28859c2 Merge branch 'feature_bandwidth' of https://github.com/SCLiao47/pytho… SCLiao47 May 1, 2023 https://github.com/python-control/python-control/pull/889/commits/28859c2c8c8f7ef7a20bd7d60f1f23520ad9c79f
a370cdb remove _bandwidth method in lti.py SCLiao47 May 4, 2023 https://github.com/python-control/python-control/pull/889/commits/a370cdb65e7038cae6ffe88f881dba00ff87b7d9
02172b7 resolving format issues in xfrefcn.py SCLiao47 May 7, 2023 https://github.com/python-control/python-control/pull/889/commits/02172b7a2238adc0b4c49bfefdfb475368984d7e
ab68562 add docstring to lti.bandwidth SCLiao47 May 8, 2023 https://github.com/python-control/python-control/pull/889/commits/ab685623a40853d66d2ac617545307e75ef50a80
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