Pendulum problem, help please

Hello,

I have a bit of a problem that I'd like some help with if possible.

Inspired by conservationdrones.org I've teamed up with one of my friends who works in bat conservation in order to use drones (quadcopter) to survey bat populations. 

In order to do this we need to attach an ultrasonic microphone and recorder to the drone. We can't attach it directly as there's too much ultrasonic interference from the motors so have decided to try and attach it at a distance of 3m away on some string.

This is the result from that effort:

https://www.youtube.com/watch?v=T_gVA8fLbpA

As you can see there's far too much oscillation going on with the detector beneath the quad which eventually leads to the string getting caught in the motors.

Do you have any ideas for how we might attach the microphone and recorder? They weigh about 300g in total.

Thanks in advance,

Tom

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

Join diydrones

Email me when people reply –

Replies

  • I flew with a telescopic (rigid) 50cm "arm" with some RF sensitive equipment attached to the end.  The plastic telescope slide together into about 15cm during landing.

    If you make youself something like that - a lower, rigid point - you'll make it unable to get tangled.

    As for the pendelum effect - length of the line is important.

This reply was deleted.

Activity

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…
Friday
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
Friday
DIY Robocars via Twitter
UC Berkeley's DIY robocar program https://roar.berkeley.edu/
Friday
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…
Friday
DIY Robocars via Twitter
RT @arthiak_tc: Donkey car platform ... Still training uses behavioral cloning #TCXpo #diyrobocar @OttawaAVGroup https://t.co/PHBYwlFlnE
Nov 20
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
DIY Robocars via Twitter
RT @SmallpixelCar: Going to @diyrobocars race at @UCSDJacobs https://t.co/Rrf9vDJ8TJ
Nov 8
DIY Robocars via Twitter
RT @SmallpixelCar: Race @diyrobocars at @UCSDJacobs thanks @chr1sa for taking the video. https://t.co/kK686Hb9Ej
Nov 8
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
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
DIY Robocars via Twitter
Oct 23
DIY Robocars via Twitter
Oct 19
DIY Robocars via Twitter
Oct 18
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
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
DIY Robocars via Twitter
RT @a1k0n: Fully autonomous wipeout in the corkscrew at Laguna Seca @selfracingcars today. Got some tuning to do; this car is very fast, bu…
Oct 13
More…