Curtis Olson wrote: > On Tue, Jan 26, 2010 at 2:36 AM, syd adams wrote: > > > It works, but the behaviour is unexpected, or I got it wrong > about VOR > navigation. > > > Sounds like it could be a faulty config file ,,, but the proper > way to do a VOR navigation is : > Set your (VOR/LOC) frequency .... set your desired course / radial. > Set your heading bug to intercept the course ... most autopilots > ive been studying go into heading hold automatically if your > outside the capture range ... then NAV engages when your in range > of the course (not the station). > > > I would say be a little careful about what config file you use as an > example. There is some slightly goofy stuff that has crept into some > autopilots over the years. There are some stages that could easily be > "P" only, but are written as PID which leads to more hunting and > oscillations or long term errors than otherwise would be necessary I fixed the ocillations on a couple of aircraft, however all the aircraft have this NAV1/VOR slow correcting error which is completely unrealistic imho, such as following a SID or STAR as the aircraft doesnt really get on course until near the VOR station. (red in the image below).
http://imgur.com/LL6b9 What this implies is that say I am 100nm away from a VOR, and just within the 30 degree correction, then it would take 100nm to correct that final 30 degree. Is there a way to sort this with a PID. And as Syd pointed out with the "car" and "road" analogy, then the car would be in the ditch most of the time ! pete ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
