Comments

• Moderator

  Brian August 7, 2012 at 10:32pm

  Doc, How's your project going?
• Harry July 30, 2012 at 4:54pm

  I know it's not directly related to Ardupilot just yet, but I got the ArduIMU based Tricopter working finally.  It was pointed out to me that SPI wont allow certain pins to be used at the same time as the MPU6000.  All I had to do was move the ESC's and servo to another set of pins and reassign them.  Time for testing. 
• 

  Anwar Ali Khan July 27, 2012 at 3:05am

  @Graham Dyre, Now I understand it, manay thanks. In fact I want to be clear about behaviours of each of the functions before I fly but still there are some problems on the hard/shotware side. I will fly when I will get hold of all those issues.
• Moderator

  Graham Dyer July 27, 2012 at 12:15am

  You can bring it back in FBW mode as the plane flies normally (in FBW_A) except roll and pitch are limited. I used it extensively in teaching as it never allowed the student to exceed around 15 degree roll or pitch. Also used it for FPV where again it wouldn't allow excessive bank or roll angles.

  In FBW and Stabilize modes a degree of stabilization is always present, ie if wind turbulence causes a small roll the AP will correct the plane and return it to level. In Manual mode no Stabilization is present. The plane will fly as if it had no AP.

  Of course, Auto is full autonomous waypoint navigation including stabilization but not rate limited if you "nudge" the controls.

  At all times you need to be in range of the radio, I experimented with a few code revisions from Jason Short to get the failsafe to work properly but that was never concluded.
• 

  Anwar Ali Khan July 26, 2012 at 11:54pm

  @Graham Dyre, OK thanks I get it now. So on FBW the plane has to be within range of radio and to bring it back the radio will be switched to MANUAL.
• Harry July 26, 2012 at 7:29pm

  I went to a lot of trouble to try and get Jean-Louis' TrIMUpter code to work with the new IMU and the best I can do is to get it to control one motor only.  The other motors and the servo just beep.  The one motor does react to movement of the IMU but I need more than that.  If I take out the IMU code, it responds to stick movement like it should.  

  What I'm wondering is if dividing the code into seperate loops might help.  I'm not sure how to do that, but I notice the MPU6000 runs at a slower 10 Hz and the main loop() is at 70 Hz. 

  Any theories?

  Anyway, I might just give up on the IMU doing double duty.  I might be better off adding Tricopter mixing to the Ardupilot since it will work with the new IMU. 

   
• Moderator

  Graham Dyer July 26, 2012 at 1:21am

  Very simply, in practise as I understand it, FBW is Stabilize but with a rate limited function (you cannot exceed certain bank and pitch angles). Stabilize itself allows unlimited bank and pitch angles while still providing stabilizing functions
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  Anwar Ali Khan July 26, 2012 at 12:17am

  Hi all, A simple question: Is Fly By Wire (FBW) follows some GPS WP. If so then what is the difference between FWB and AUTO? If not then what is the difference between FWB and STABILIZE? What it is actually used for?
• Moderator

  Brian July 24, 2012 at 10:38pm

  Not to be too geeky but I think that a molded in "eyeball" is all the ticket.  Something that would allow you to have one of those security domes on the outside to keep the aerodynamics but some gear on the inside keeping the video nice and level, or two eyeballs one forward the other side view where their roles could switch based on orientation.

  Regarding the 2.2 or 2.7... I've always said bigger BIGGER!  If you are considering a beast of 2.2m then going 2.7 is not any worse off, quite the other way imo, better payload, better for heavy winds, once it breaks down, it wouldn't matter so I say 2.7... When are we going to be able to get our fingers on one of these? I really want a large delta...

  BTW - I'll post the code and recap what you said about it being an interim and the key points on GPS. Thanks 
• 

  Dr Mike Black July 24, 2012 at 1:22am

  HI Guys,

  Brian, no problem, summet worth noting is that this is an interim version,i think teh V2.8 will have the 5 pos as Harry and i were talking, and the ability to script a flight, (not APM way, as i want to keep it with all present variables)

  Overview, nothing i can think of right this moment, apart from GPS is everything, its all the keys to all the locks...

  If that is not working properly it wont fly properly,

  Anwar, not had a chance to look at your data yet, but i wil get back to you on that.

  Did a little more of the X-10 also..
  2 versions have sprung from it, the original at 2.2m, and the extended (which to me and others that suggested we did it) looks much better at 2.7mAnyway...thoughts?

  Kind regards,

  
  mike.