At 11:56 AM -0500 7/23/04, Jon S Berndt wrote: >Does DAVE-ML only cover vehicle characteristics, or does it (will it) cover >environment and initial conditions? > >A question has been raised here in Houston that I found interesting. Say that a >simulation application is serving as a prototyping tool for a new flight software >capability for some vehicle. I can imagine that both the vehicle characteristics and >the control laws could be defined using DAVE-ML. I'm not sure if that is a fair >characterization - I can't recall seeing the features of DAVE-ML that address FCS >definition. Anyhow, at some point it is possible that the prototyping will be >finished and that actual flight software is written - perhaps in a different language >than the original prototyping was done in. Subsequently, it might come to pass that >the flight software gets to be tested in place of the prototype code. So, then the >DAVE-ML definition of the vehicle characteristics would I think need to handle >bypassing the prototype FCS capability and instead include the specification of an >interface to the actual flight code. Is this a special case, or something that is out >of scope for DAVE-ML? Is it already handled? > >Jon Berndt
Jon, DAVE-ML at this point doesn't do control laws; we're limited right now to just static models (e.g. aero and inertia models). In the eventuality that one desires to only use part of a DAVE-ML vehicle spec (as in your example, another implementation of flight control laws), the replacement scheme is left up to the user. They could eliminate that part of the DAVE-ML model or come up with some other means to ignore or switch out portions of the DAVE-ML model. The scope of DAVE-ML is to specify some baseline flight dynamics model of a vehicle, so variations on that theme would have to be handled with either a modified DAVE-ML document or some external means. Not an entirely satisfactory answer, I'm sure; I'll be glad to hear other comments. -- Bruce Jackson -- Bruce Jackson mailto:[EMAIL PROTECTED] Dynamics and Control Branch 18C West Taylor Street MS 132 Airborne Systems Competency NASA Langley Research Center Hampton, Virginia 23681 More info about DAVE-ML: <http://dcb.larc.nasa.gov/utils/fltsim/DAVE> Simulation standards discussion listserv mailto:[EMAIL PROTECTED]
