Range issues with "Ardupilot in the loop"

We have everything up and running in our fixed wing trainer but only get 40 feet away during the collapsed antenna range test before the servos go nuts. If Ardupilot is taken out of the loop, Range is over 100 ft, the plane flies fine and the Co Pilot works.I removed all avionics from the plane and set them up on a test bed for diagnostics. Here's what we've tried----1-Running Ardupilot off separate battery2-Grounded shielding of Ardupilot and input cables3-Opto isolation of Rx from Ardupilot4-Reorienting componentsI'm using a Futaba 72MHz PPM Rx and no matter what methods we've tried, the range is still cut in half. Anyone else have these issues or are my avionics possessed!?

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • I have a Futaba 72mhz radio as well and am experiencing similiar issues. All will be fine then sudden twitching of the servos. May have to try a 2.4 to see if this solves the problem.
  • Developer
    I am using JR 7202 @ 72 mhz with no range issues.
  • Seems like this is a common issue for Futaba 72Mhz radio. I faced this problem before and I had a discussion here: http://diydrones.com/forum/topics/705844:Topic:14909

    After I switched to the Futaba 2.4GHz FAAST radio, all the problem solved. It's really worth the money to switch to the 2.4 one instead spending time on troubleshooting the 72Mhz one.
  • I still am waiting for my plane to arrive, and I do not yet have my ardupilot set up so I have to answer this question academically... However, I do know a bit about wireless communicaitons. Is there anything that changes in the environment between the two tests For example:
    Do you have xbee running at the same time?
    Are you testing this outdoors?
    When you test, are their objects around that can cause reflections of the wireless signal? At 72 MHz at 100 feet multipath is unlikely but not impossible.
    One oddball thing - when you are running ardupilot do you have a PC around? You would be amazed how easily a laptop can saturate a 2.4 GHz radio.

    Anyhow, RF can cause weird problems
  • Admin
    Bryan,

    You mentioned the Co Pilot in your post above. Are you using the FMA Co Pilot and version 1.0 of the Ardupilot flight software? If so, you need to move up to a later version of the Ardupilot board and the Ardupilot software.

    Just a thought.

    Regards,
    TCIII
  • Hi Chris,
    Ardupilot and Rx on the same battery was our baseline arrangement but the Ardupilot power was from soldered wires to the Bat + and - on the board, then we tried variations 1-4. I'll try using using just the power from the Rx inputs (as written in the Ardupilot page) and see what happens.
    Thanks
  • 3D Robotics
    We use exactly the same configuration, but with ArduPilot powered by the Rx, and get range measured in miles. Why don't you try that configuration and see if it makes a difference?
This reply was deleted.

Activity

DIY Robocars via Twitter
4 minutes ago
DIY Robocars via Twitter
RT @_JonMyer: šŸšØAttention DeepRacer's including #UndergroundDeepRaceršŸšØ Check our our LIVE stream that including @IAM_dbro Take a few momentsā€¦
Aug 5
DIY Drones via Twitter
RT @MarvelmindMaxim: Extreme precision for 60 swarming robots. #marvelmind #autonomousrobotics #robotics #swarmrobotics #rtls #ips #indoorā€¦
Aug 3
DIY Drones via Twitter
RT @MarvelmindMaxim: Precise (Ā±2cm) tracking for racing boats and autonomous boats. Works outdoor and indoor. #autonomous #AutonomousVehicā€¦
Aug 3
DIY Drones via Twitter
RT @MarvelmindMaxim: Helping PixHawk folks to fly autonomous quadcopters using PX4 and ArduPilot. https://marvelmind.com/drones/ Equally suitabā€¦
Aug 3
DIY Robocars via Twitter
RT @chr1sa: The @DIYRobocars @donkey_car virtual AI car race is starting in 15 minutes! Watch it live on Twitch https://www.twitch.tv/mossmann3333 httā€¦
Aug 1
DIY Robocars via Twitter
RT @chr1sa: Don't miss our monthly @DIYRobocars @donkey_car virtual AI car race tomorrow at 10:00am PT live on Twitch. Head-to-head racingā€¦
Jul 31
DIY Robocars via Twitter
RT @sparkfun: Our completed tutorial on building an @NVIDIA Jetson Nano-powered @Sphero RVR gets your bot up and running via teleoperationā€¦
Jul 30
DIY Robocars via Twitter
RT @SmallpixelCar: Freeway test https://t.co/4V5tV9lhIP
Jul 29
DIY Robocars via Twitter
Very small autonomous cars racing, thanks to an overhead camera: https://control.ee.ethz.ch/research/team-projects/autonomous-rc-car-racing.html
Jul 29
DIY Robocars via Twitter
Jul 29
DIY Robocars via Twitter
Jul 29
DIY Robocars via Twitter
RT @chr1sa: Don't miss our virtual AI car race this Saturday! Real developers + virtual cars =šŸŽļøšŸŽļøšŸŽļø Head-to-head battles with thrills, spā€¦
Jul 28
DIY Robocars via Twitter
Jul 27
DIY Robocars via Twitter
RT @usashirou1: Jetson nano by Isaac Kaya #jetson https://t.co/Mu1N0CyQkN
Jul 23
DIY Robocars via Twitter
RT @GPUsolution: JetRacer mady by Iflytek company #JetsonNANO #Nvidia https://t.co/MimTymIwge
Jul 23
Moreā€¦