Altitude holder problems

I tried to move my flight mode to Altitude holder when I was flying but when I around 2 meters from the ground the drone tries to land.
When I give some more power to adjust the altitude, the drone jumps like there is a bad reading of the sonar but I checked the logs and it seems to be good.

Do I have too much noise on the accelerometer ? Do I need to tune the altitude PID ?

Flying in stable mode is good

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

Join diydrones

Email me when people reply –

Replies

  • Hi Chris
    Installed exactly following the Sonar instructions, including shielded cable etc. Sonar is mounted on a large Y6 on a carbon arm away from prop wash. Also isolated against accustical noise from the motors with some side-mounted foam (as on Marco Robustini's Octo as seen in the 3.0.1 announcing video, leaving of course downwards view free, just in case you would ask :-).

    Baro is factory made covered in the APM 2.5 case and in addition is below a top plane on which a GPS antenna with a quite large cooper ground plane is mounted which gives, as a side effect, also full shade to the baro (as recommended by Microcopter Germany).
    Log's show no strange readings.
    This is why I do not know where to search any more. 

  • Too many unknowns about your setup. Is your barometer correctly covered so that its shielded form light and wind/prop wash? You say you have a sonar. Is it setup correctly? 

    http://copter.ardupilot.com/wiki/sonar/

    Go through all these: 

    http://copter.ardupilot.com/wiki/troubleshooting-2/

  • I have exactly the same and could not yet find a solution.

  • Any idea? nobody?

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @Smartphone89: DonkeyCar Racing League Korea #donkeycar @diyrobocars https://t.co/mDlHDR1d98
16 hours ago
Jørn Ramnæs liked VIDEO LINK's profile
yesterday
Mark Harrison left a comment on Moderators
"Wow, Ning2 looks really great on mobile. I had sort of drifted away as my browse-time went more on my phone, so this is great."
yesterday
Hank Deucker left a comment on PIXHAWK
"I am sure most will say not again, Pixhawk telemetry. I do need help and all can be reassured that I have spent many hours scouring the net for useful information. I am not new at quadcopter flying, I started in 2012 and have progressed through many…"
yesterday
DIY Robocars via Twitter
https://t.co/rLmFr8M2UK
yesterday
Hank Deucker left a comment on PIXHAWK
"Tomorrow, I am thinking about the wording at the moment."
Thursday
DIY Robocars via Twitter
https://t.co/8EMCvYW6oz
Tuesday
DIY Robocars via Twitter
RT @OttawaAVGroup: We are going to try something new this week. We will be having a drop-in style meeting Wednesday @ 7-9pm EST. Pop in and…
Monday
DIY Robocars via Twitter
RT @tawnkramer: Thanks Everyone for another fun virtual race! Amazing Ai racers competing head-to-head, Virtual Makers Fair event. Catch us…
May 23
DIY Robocars via Twitter
RT @make: Find out the latest from @diyrobocars at 10am PT from @chr1sa of @3DRobotics on Virtually Make Faire! #makerfaire #maketogether #…
May 23
DIY Robocars via Twitter
RT @Heavy02011: Join us Saturday online: Virtual Race League: @DIYRobocars Race #2 - Parking Lot Nerds https://t.co/aJUu4sdutx #Meetup via…
May 22
DIY Robocars via Twitter
RT @donkey_car: Yay, we are part of the virtual @makerfaire with @diyrobocars. Come see our race or better yet train a model and race with…
May 21
DIY Robocars via Twitter
RT @chr1sa: The @DIYRobocars Virtual AI Race is going to be part of the virtual @makerfaire on Sat! https://t.co/wnMDAboLID
May 20
DIY Robocars via Twitter
RT @tawnkramer: Please join us next week for our second DIYRobocars online race. We will be using a new Mountain Track course! https://t.co…
May 19
DIY Robocars via Twitter
RT @SmallpixelCar: I realized that the size of the cones in @diyrobocars is known. If we can detect the bounding box, which can be done wit…
May 19
DIY Robocars via Twitter
RT @chr1sa: Our next @DIYRobocars autonomous car virtual race is this Saturday. Sign up here to compete or just spectate on @Twitch https:/…
May 19
More…