Alt-Hold problem

I am using the Crius AIO pro board and running mpng's port of APM on it. It has worked flawlessly before but after a major crash and some modifications to the platform regarding changes in props, weight, reflashing, migrating from 3S to 4S battery and so on I don't know if the crash is the problem. Maybe it is just in the settings?

The copter flies super nice in stabilize and ACRO but when I engage Alt-Hold it goes nuts. So far I've only tried it for a couple of seconds before I feel like I have to go back to stabilize. The copter switches throttle at what seems random, falling at points and others climbing.

The baro seems unharmed and I've covered it nicely with foam not letting any light in and still giving it room to breath.

Here are some logs that I don't really understand. Looking at DroidPlanner while flying the altitude seemed to fluctuate a lot and at points reaching below -10 and above 20 when I'm only been hovering above ground. Testing the baro in the apartment and lifting the platform from floor to roof it seems go give nice readings between 0m and 2.2 (as high as I can lift).

3691152132?profile=original 3691152158?profile=original 3691152071?profile=original 

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

Join diydrones

Email me when people reply –

Replies

  • T3
    Did you check your vibrations. Altitude hold relys on accelerometer and z axis. Check the wiki for instructions on vibration.
    • thank you for your reply Richard. I will check it out. The background is that is has worked flawlessly in alt-hold before but they are lots of mods done and the crash combined. The stabilize mode is running really smooth so I just guessed the vibrations where low. I also have vibration damping on the FC to reduce vibrations but will check logs.

  • The Baro must be fried. I got for some reason signal loss with my transmitter today while flying and the copter entered RTL going crazy up and down finally almost crashing brutally onto the ground. Fortunatelly I got control again with the remote and could give it some gas to slow it down on its way to the ground. I'm declaring my baro on this Flight Controller dead. Won't use it again. Too bad =/

    If you have any suggestions please let me know and I'll try it out.

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @chr1sa: Donkeycar 4.4 released with tons of new features, including path learning (useful with GPS outdoors), better Web and Lidar supp…
Nov 27, 2022
DIY Robocars via Twitter
RT @NXP: We are already biting our nails in anticipation of the #NXPCupEMEA challenge! 😉 Did you know there are great cash prizes to be won…
Nov 24, 2022
DIY Robocars via Twitter
RT @gclue_akira: レースまであと3日。今回のコースは激ムズかも。あと一歩 #jetracer https://t.co/GKcEjImQ3t
Nov 24, 2022
DIY Robocars via Twitter
UC Berkeley's DIY robocar program https://roar.berkeley.edu/
Nov 24, 2022
DIY Robocars via Twitter
RT @chr1sa: The next @DIYRobocars autonomous car race at @circuitlaunch will be on Sat, Dec 10. Thrills, spills and a Brazilian BBQ. Fun…
Nov 24, 2022
DIY Robocars via Twitter
RT @arthiak_tc: Donkey car platform ... Still training uses behavioral cloning #TCXpo #diyrobocar @OttawaAVGroup https://t.co/PHBYwlFlnE
Nov 20, 2022
DIY Robocars via Twitter
RT @emurmur77: Points for style. @donkeycar racing in @diyrobocars at @UCSDJacobs thanks @chr1sa for taking the video. https://t.co/Y2hMyj1…
Nov 20, 2022
DIY Robocars via Twitter
RT @SmallpixelCar: Going to @diyrobocars race at @UCSDJacobs https://t.co/Rrf9vDJ8TJ
Nov 8, 2022
DIY Robocars via Twitter
RT @SmallpixelCar: Race @diyrobocars at @UCSDJacobs thanks @chr1sa for taking the video. https://t.co/kK686Hb9Ej
Nov 8, 2022
DIY Robocars via Twitter
RT @PiWarsRobotics: Presenting: the Hacky Racers Robotic Racing Series in collaboration with #PiWars. Find out more and register your inter…
Oct 23, 2022
DIY Robocars via Twitter
RT @Hacky_Racers: There will be three classes at this event: A4, A2, and Hacky Racer! A4 and A2 are based around UK paper sizing and existi…
Oct 23, 2022
DIY Robocars via Twitter
Oct 23, 2022
DIY Robocars via Twitter
Oct 19, 2022
DIY Robocars via Twitter
Oct 18, 2022
DIY Robocars via Twitter
RT @NeaveEng: Calling all UK based folks interested in @diyrobocars, @f1tenth, @donkey_car, and similar robot racing competitions! @hacky_r…
Oct 13, 2022
DIY Robocars via Twitter
RT @araffin2: 🏎️ After hours of video editing, I'm happy to share a best of my Twitch videos on learning to race with RL. 🏎️ Each part is…
Oct 13, 2022
More…