Hi all, Please see the video below of our crazyflie (tracked by lps) hovering at a fixed point in space. Our final goal is to have four drones flying in a tight space (1,5 x 1,5 x 1,5m). For this we need a very accurate setup. Does anyone have experience with multiple drones in a tight space? And are there any tips & tricks to increase the accuracy of LPS?
Video: https://www.youtube.com/watch?v=n53zySC ... e=youtu.be
Multiple drones and LPS accuracy
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- Beginner
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- Joined: Mon Dec 12, 2016 2:31 pm
Re: Multiple drones and LPS accuracy
Hi,
X/Y looks quite OK but the Z accuracy is quite bad. We have seen that reducing vibration can increase a lot the Z accuracy, you can try to balance your propeller and if you had crash before maybe some motor are vibrating a bit much.
The current position controller is not ideal and there has been work on new feed-forward controllers that should land in the master branch (hopefully) soon.
X/Y looks quite OK but the Z accuracy is quite bad. We have seen that reducing vibration can increase a lot the Z accuracy, you can try to balance your propeller and if you had crash before maybe some motor are vibrating a bit much.
The current position controller is not ideal and there has been work on new feed-forward controllers that should land in the master branch (hopefully) soon.
Re: Multiple drones and LPS accuracy
Hi, We just discovered and fixed a bug that should improve the LPS performance: viewtopic.php?f=17&t=2279, this should help with the stability.
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- Beginner
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Re: Multiple drones and LPS accuracy
Thanks Arnaud, we'll check this out. I'll also fly again with a new copter because the one you saw in the video crashed a number of times.
Re: Multiple drones and LPS accuracy
Hey bart,
Nice work. I was wondering if you had the chance to test the drone after the fixed bug that arnaud mentioned.
Good luck.
Nice work. I was wondering if you had the chance to test the drone after the fixed bug that arnaud mentioned.
Good luck.
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- Beginner
- Posts: 7
- Joined: Mon Dec 12, 2016 2:31 pm
Re: Multiple drones and LPS accuracy
Sorry for the delay. Yes we have updated the firmware of the Crazyflie. It does indeed perform better. Especially on the Z axis. But we're not sure yet if it's a good idea to let 4 quadcopters fly together in a tight space.
https://www.youtube.com/watch?v=uYpqou_ ... e=youtu.be
https://www.youtube.com/watch?v=uYpqou_ ... e=youtu.be
Re: Multiple drones and LPS accuracy
Are you using TDoA or two way ranging? It still looks quite shaky, I think we are getting better hover stability than that. 4 CFs in a tight space might indeed be challenging.