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Re: [Jsbsim-matlab] JSBSim S-Function
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From: b m. <bri...@in...> - 2009-03-09 12:17:55
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Thanks Stuart! Hopefully between the work that Agostino is doing and the work that I'm doing we can get a user-friendly "package" that will allow people to play with this stuff using both Simulink and the Matlab command window. The DAVEML stuff sounds pretty cool- I will have to check it out. Brian ----- Original Message ----- From: "Bowman, D. Stuart" <sb...@mi...> Date: Friday, March 6, 2009 11:28 Subject: Re: [Jsbsim-matlab] JSBSim S-Function To: "jsb...@li..." <jsb...@li...> > I've been thinking of this same idea for a while. Take a flight > control system designed in Matlab and autoconvert it to JSBSim's > XML format. As you say, all of the basic components that exist > in JSBSim for flight control also exist in Simulink. Higher > level logic implemented by a Flight Management System might be > more difficult to boil down to XML, but not necessarily > impossible. I'd love to hear how this work progresses, Brian! > > The work of the DAVEML project (http://daveml.nasa.gov/) has > produced a converter that takes their models from DAVEML to > Simulink. The converter is written in JAVA. This is a least > proof of concept that the mdl files can be read and processed > (though, they do look rather complicated!). > > Also, glad to hear you switched the Simulink model to using > discrete components. That was the right move for matching JSBSim. > > Cool work! > > -Stuart > From: b mills [mailto:bri...@in...] > Sent: Thursday, March 05, 2009 7:37 PM > To: jsb...@li... > Subject: Re: [Jsbsim-matlab] JSBSim S-Function > > So it seems entirely possible to generate jsbsim config files > from simulink subsystems. Most of the components of a > jsbsim fcs already exist in simulink (gains, summers, pids, > lookup tables etc.) Custom masked subsystem blocks could be > designed for actuators and the fcs_function components. > That would pretty useful if you could "build" a fcs_function as > a block component/subsystem in simulink and then have it auto- > generate the corresponding xml. > > Brian > > ----- Original Message ----- > From: Agostino De Marco <ago...@un...> > Date: Friday, March 6, 2009 1:19 > Subject: Re: [Jsbsim-matlab] JSBSim S-Function > To: jsb...@li... > > > Simulink .mdl files are in simple ascii text format. > > MDL stands for Model File Format. > > It contains keywords and parameter-value pairs that describe the > > model.The file describes model components in hierarchical order. > > > > There are quite a few fellows that have worked on parsing .mdl > format.> This is an example using python: > > http://www.fauskes.net/nb/parsing-simulink/ > > Scrolling all the posts in the above page I could get lots of info. > > > > Another example in Java: > > http://conqat.cs.tum.edu/index.php/Simulink_Library > > > > Agostino > > > > > > > > > > > > Quoting b mills <bri...@in...>: > > > > > I've been using modified Aerosim xml parsers to import JSBSim > > config > > > files into Matlab for several years now. The problem > is that > > the > > > parsers have not kept pace with changes in the JSBSim xml format. > > > > > They are in need of an overhaul and I can currently only import > > the > > > old (v1.0?) format JSBSim files. The parsers are written as > > m-files. > > > > > > What would be interesting is to see if a matlab m-file could > > be > > > written that would "parse" a simulink model of say, a flight > > control > > > subsystem, and produce a JSBSim compatible fcs xml file. If > > RTW > > > workshop can turn a simulink model into code, then it seems > > like > > > something could be written as an m-file to do this. I've > > already > > > written a Matlab GUI program that can produce a JSBSim FCS xml > > file, > > > so some progress is already made on this. > > > > > > Brian > > > > > > ----- Original Message ----- > > > From: Agostino De Marco <ago...@un...> > > > Date: Thursday, March 5, 2009 9:02 > > > Subject: Re: [Jsbsim-matlab] JSBSim S-Function > > > To: jsb...@li... > > > > > >> This is interesting actually. Using JSBSim with Matlab may > > >> open new and unespected perspectives. > > >> I think that the data-driven feature of JSBSim is the most > > >> beneficial for Matlab users. An interesting area could be > > >> how to import the JSBSim configuration structure in a > > >> Matlab structure. > > >> > > >> Agostino > > >> > > >> > > >> Quoting "Jon S. Berndt" <jon...@co...>: > > >> > > >> > This sounds very interesting. I guess at some point I'll > > have to > > >> get a demo > > >> > version of Matlab and try this out. > > >> > > > >> > > > >> > > > >> > Jon > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > From: b mills [mailto:bri...@in...] > > >> > Sent: Thursday, March 05, 2009 1:06 AM > > >> > To: jsb...@li... > > >> > Subject: [Jsbsim-matlab] JSBSim S-Function > > >> > > > >> > > > >> > > > >> > Building off the work that Agostino has already completed, > > I now > > >> have a > > >> > JSBSim S-function running in Matlab. It is pretty > rudamentary,> >> but it > > >> > appears to work. I was even able to linearize it > using the > > >> Control and > > >> > Estimations Tool Manager. As it is curently > implemented. the > > >> derivatives of > > >> > the states are calculated by JSBSim and then integrated to > > >> continuous states > > >> > by Matlab. > > >> > > > >> > > > >> > > > >> > I will be working to further develop this over the next few > > days. > > >> > > > >> > > > >> > > > >> > Brian > > >> > > > >> > > > >> > > >> ------------------------------------ > ---------------- > > >> --- > > >> Agostino De Marco, PhD > > >> Assistant Professor > > >> Università degli Studi di Napoli Federico II > > >> / University of Naples Federico II / > > >> Dipartimento di Ingegneria Aerospaziale > > >> / Department of Aerospace Engineering / > > >> via Claudio 21, 80125 Napoli - Italy > > >> Tel.: +39 0817683323 > > >> Fax: +39 0817683622 > > >> Email: ago...@un... > > >> Web 1: www.dpa.unina.it/adag > > >> Web 2: www.dpa.unina.it/demarco > > >> ------------------------------------------------------- > > >> > > >> > > >> ------------------------------------------------------------ > -- > > --- > > >> ------------- > > >> Open Source Business Conference (OSBC), March 24-25, 2009, San > > >> Francisco, CA > > >> -OSBC tackles the biggest issue in open source: Open Sourcing > > >> the Enterprise > > >> -Strategies to boost innovation and cut costs with open source > > >> participation-Receive a $600 discount off the registration fee > > >> with the source code: SFAD > > >> http://p.sf.net/sfu/XcvMzF8H > > >> _______________________________________________ > > >> Jsbsim-matlab mailing list > > >> Jsb...@li... > > >> https://lists.sourceforge.net/lists/listinfo/jsbsim-matlab > > >> > > > > > > > --------------------------------------------- > ------- > > --- > > Agostino De Marco, PhD > > Assistant Professor > > Università degli Studi di Napoli Federico II > > / University of Naples Federico II / > > Dipartimento di Ingegneria Aerospaziale > > / Department of Aerospace Engineering / > > via Claudio 21, 80125 Napoli - Italy > > Tel.: +39 0817683323 > > Fax: +39 0817683622 > > Email: ago...@un... > > Web 1: www.dpa.unina.it/adag > > Web 2: www.dpa.unina.it/demarco > > ------------------------------------------------------- > > > > > > --------------------------------------------------------------- > -- > > ------------- > > Open Source Business Conference (OSBC), March 24-25, 2009, San > > Francisco, CA > > -OSBC tackles the biggest issue in open source: Open Sourcing > > the Enterprise > > -Strategies to boost innovation and cut costs with open source > > participation-Receive a $600 discount off the registration fee > > with the source code: SFAD > > http://p.sf.net/sfu/XcvMzF8H > > _______________________________________________ > > Jsbsim-matlab mailing list > > Jsb...@li... > > https://lists.sourceforge.net/lists/listinfo/jsbsim-matlab > > > |
