Discussions

Unstable altitude hold

Posted by Kristoffer de Jesus on June 30, 2013 at 3:46am

Our quadcopter with APM 2.5 has unstable altitude hold, it goes up and down. However, if it is very high, it stabilizes. What are the possible problems? Do you think the barometer has a problem? If it does have a problem, how do you fix or replace the barometer? Can you add a separate barometer to the board?

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Replies

Pritesh Metha January 28, 2017 at 6:41pm

First I have a similar problem regarding altitude hold.Then i checked the IMU logs for vibration .vibrations are more so i used a anti vibration mount pad and vibration are reduced and put a black foam above the barometer.Problem is solved.Throttle stick must be in middle.Check this video:

https://www.youtube.com/watch?v=meahdxCoOJA
Kristoffer de Jesus July 22, 2013 at 12:52am

We just bought Maxsonar 1240 but haven't installed them yet. We got an original 3DR APM 2.5 and it works better, just a little more fine tuning. We also got a JDrones APM 2.5. I hope it works fine.
J Dilling July 22, 2013 at 12:28am

You use a sonar?
Kristoffer de Jesus July 9, 2013 at 1:24am

No, I haven't solved this yet. My friend who has been setting up and using several APM 2.5s said that he has not experienced this yet. This might be caused by the fact that my APM 2.5 is a cheap China clone. How about yours, is it also a clone or an original? How about you, what solutions did you try to do? Did you put foam on top of the barometer? Did you use dampening material to dampen the vibration to your board?
Cam Batten July 9, 2013 at 1:06am

I have a similar problem, did you solve this?

Cheers,

Cam