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Re: [python-control-discuss] discrete time / multiple repositories
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From: Roberto B. <rob...@su...> - 2011-11-27 07:53:34
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You're probably right I'll check today. Ciao Roberto On 11/27/2011 08:09 AM, Gustavo Goretkin wrote: > I think I've figured it out. > > within the yottalab dare function: > rcond,X,w,S,T = \ > sb02od(nstates, ninputs, A, B, Q, R, 'D'); > > should be > > X,rcond,w,S,T = \ > sb02od(nstates, ninputs, A, B, Q, R, 'D'); > > (a similar change applies to the yottalab care function) > > > On Sat, Nov 26, 2011 at 2:23 PM, Roberto Bucher<rob...@su...> wrote: >> You're right >> >> something is not correct in the solution of "dare" with your matrices. I >> have to check if the problem is in my "dare" function or in the sb02od >> function of the avventi slycot library. >> >> I'll check ASAP >> >> Best regards >> >> Roberto >> >> On 11/26/2011 06:48 PM, Gustavo Goretkin wrote: >> >> Hi Roberto, >> >> Thanks for the files. >> >> I do think I'm getting different behavior between MATLAB's dlqr and >> Yottalab's. I'm attaching two files for the different environment >> showing my results. >> >> Gustavo >> >> >> >> On Sat, Nov 26, 2011 at 12:05 AM, Roberto Bucher >> <rob...@su...> wrote: >> >> Hi Gustavo >> >> here you are the modified files: >> >> matlab.py >> xferfcn.py >> statesp.py >> >> and the last yottalab.py file. >> >> Simply substitute them in the control-0.5a src folder and reinstall the >> control package. >> >> then copy directly yottalab.py at the right place (e.g. >> /usr/local/lib/python2.7/dist-packages/) >> >> Basically I've compared the result of my functions with Matlab and >> Scicoslab, and in my examples I didn't find differences. >> >> Best regards >> >> Roberto >> >> On 11/25/2011 09:48 PM, Gustavo Goretkin wrote: >> >> Hi Roberto, >> >> Thanks for the quick reply! >> >> Regarding the dlqr function in yottalab.py -- it doesn't seem to >> depend on the sampling time of the discrete time system and this >> appears to produce incorrect result, or perhaps maybe I am misusing >> the function. >> >> Thank you, >> Gustavo >> >> On Fri, Nov 25, 2011 at 3:38 PM, Roberto Bucher<rob...@su...> >> wrote: >> >> Hi Gustavo >> >> yottalab.py requires some changes in some python control files. I'll >> check ASAP my last modifications and I send you the required files. >> >> Best regards >> >> Roberto >> >> On 11/25/2011 09:21 PM, Gustavo Goretkin wrote: >> >> Hey list, >> >> I'd like to try use some discrete-time in python-control. >> Specifically, I want MATLAB's c2d and dlqr. >> >> I'm aware of the discussion here [1] and code here [2]. yottalab.py >> has a all the functionality I want (thanks!) but I'm not sure which >> branch of python-control it is assuming. Specifically in c2d, line >> line 173, there is a call to construct a statespace object which takes >> 5 arguments A,B,C,D,Ts, but no such constructor seems to exist in >> python-control. From the rest of the code (i.e. d2c), I infer that all >> it seems to do is add a field called "Tsamp" to the statespace object. >> >> If the statespace object can represent both continuous and >> discrete-time systems, what then should the semantics be? It looks >> like Tsamp=0 for continuous time systems. >> >> It also looks like there is a repository here [3]. Is it going to be >> merged with the sourceforge repository eventually, or other way >> around? >> >> Thanks! >> Gustavo >> >> [1] http://mail.scipy.org/pipermail/scipy-dev/2010-August/015468.html >> and >> [2] www.dti.supsi.ch/~bucher/wp-content/uploads/2011/03/yottalab.py >> [3] https://bitbucket.org/eike_welk/python-control >> >> >> ------------------------------------------------------------------------------ >> All the data continuously generated in your IT infrastructure >> contains a definitive record of customers, application performance, >> security threats, fraudulent activity, and more. Splunk takes this >> data and makes sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-novd2d >> _______________________________________________ >> python-control-discuss mailing list >> pyt...@li... >> https://lists.sourceforge.net/lists/listinfo/python-control-discuss >> >> ------------------------------------------------------------------------------ >> All the data continuously generated in your IT infrastructure >> contains a definitive record of customers, application performance, >> security threats, fraudulent activity, and more. Splunk takes this >> data and makes sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-novd2d >> _______________________________________________ >> python-control-discuss mailing list >> pyt...@li... >> https://lists.sourceforge.net/lists/listinfo/python-control-discuss >> >> ------------------------------------------------------------------------------ >> All the data continuously generated in your IT infrastructure >> contains a definitive record of customers, application performance, >> security threats, fraudulent activity, and more. Splunk takes this >> data and makes sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-novd2d >> _______________________________________________ >> python-control-discuss mailing list >> pyt...@li... >> https://lists.sourceforge.net/lists/listinfo/python-control-discuss >> >> ------------------------------------------------------------------------------ >> All the data continuously generated in your IT infrastructure >> contains a definitive record of customers, application performance, >> security threats, fraudulent activity, and more. Splunk takes this >> data and makes sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-novd2d >> _______________________________________________ >> python-control-discuss mailing list >> pyt...@li... >> https://lists.sourceforge.net/lists/listinfo/python-control-discuss >> >> >> >> ------------------------------------------------------------------------------ >> All the data continuously generated in your IT infrastructure >> contains a definitive record of customers, application performance, >> security threats, fraudulent activity, and more. Splunk takes this >> data and makes sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-novd2d >> >> _______________________________________________ >> python-control-discuss mailing list >> pyt...@li... >> https://lists.sourceforge.net/lists/listinfo/python-control-discuss >> >> >> ------------------------------------------------------------------------------ >> All the data continuously generated in your IT infrastructure >> contains a definitive record of customers, application performance, >> security threats, fraudulent activity, and more. Splunk takes this >> data and makes sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-novd2d >> _______________________________________________ >> python-control-discuss mailing list >> pyt...@li... >> https://lists.sourceforge.net/lists/listinfo/python-control-discuss >> >> > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure > contains a definitive record of customers, application performance, > security threats, fraudulent activity, and more. Splunk takes this > data and makes sense of it. IT sense. And common sense. > http://p.sf.net/sfu/splunk-novd2d > _______________________________________________ > python-control-discuss mailing list > pyt...@li... > https://lists.sourceforge.net/lists/listinfo/python-control-discuss |
