Sonar Testing Issues

Having fun with 2.0.23 - sofar seems stable on stock AC frame with sonar. I am not having luck with default PID for sonar (log included). As soon as I hit alt hold it will sink, but occasionally rise. This is a typical log at the default .35 .05 .3 settings.  I have played with these, seems like .45 .07 .3 gets closer to staying at altitude, sometimes a minute or two, but still can drop or shoot up for no apparent reason. I am running out of PID settings to try, never seem to hone in on stability. Sonar works fine with NG, and log seems to show correct distances for this flight. I have flicked ch7 off/ on while hovering, while hovering with alt hold, and even left it on to no apparant effect. Very strange......

05-06-11 12-31 2.log

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

Join diydrones

Email me when people reply –

Replies

  • Saw the last name and had to say Hi...lol...
  • I was having pretty good luck with my new sonar installation, using the EZ0 unit. Got a few flights in with it holding very well in sonar, zooming up and down the field at low altitude, however at the end of the runs, it would rise up a bit when I slowed down to revers course and when it rose up, past 4 meters, it just kept going up. It did this regularly. If I kept it slow, the the quad did not rise up as much and alt hold in sonar worked fine. But with some speed and the inevitable rise as I stopped the quad and reversed course, it would lose its lock and just keep going up at a steady (slow) rate until I took it off alt hold.

     

    My last run, alt hold off, I was speeding down the field about 2m altitude when it just dove over into the grass. It appears either the aft motor died, or a prop blade came off and then it just went right over. Some damage, one motor inop, but I think it's one of the wires, also could have been the reason for the in-flight shutdown.

     

    Can you guys tell what happened by looking at the attached log?

     

    Jim

     

     

    05-06-11 05-01 8.log

  • 3D Robotics
    Which sonar sensor are you using? We default to the XL MaxSonar EX0.
This reply was deleted.

Activity

DIY Robocars via Twitter
RT @_JonMyer: 🚨Attention DeepRacer's including #UndergroundDeepRacer🚨 Check our our LIVE stream that including @IAM_dbro Take a few moments…
Wednesday
DIY Drones via Twitter
RT @MarvelmindMaxim: Extreme precision for 60 swarming robots. #marvelmind #autonomousrobotics #robotics #swarmrobotics #rtls #ips #indoor…
Aug 3
DIY Drones via Twitter
RT @MarvelmindMaxim: Precise (±2cm) tracking for racing boats and autonomous boats. Works outdoor and indoor. #autonomous #AutonomousVehic…
Aug 3
DIY Drones via Twitter
RT @MarvelmindMaxim: Helping PixHawk folks to fly autonomous quadcopters using PX4 and ArduPilot. https://marvelmind.com/drones/ Equally suitab…
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 htt…
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 racing…
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 teleoperation…
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 =🏎️🏎️🏎️ Head-to-head battles with thrills, sp…
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
DIY Robocars via Twitter
RT @openmvcam: I love this: Mega or Mini? Image Classification on the 1MB OpenMV Cam H7 by Ish Ot Jr. in OpenMV, Edge Impulse, Internet of…
Jul 23
More…