Lauri
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Sensors on gas powered plane (vibration with IMUs, RF interference)

Started this discussion. Last reply by Jonathan Brandmeyer Apr 22, 2010. 8 Replies

We're trialling an 5DOF Sparkfun IMU on a 50cc gas plane with less than great results. The sensor output with our EKF implementation works fine in normal conditions. However when the motor is started…Continue

Tags: engine, vibration, gas, two, sparkfun

 

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Lauri commented on Chris Anderson's blog post One huge quadcopter!
"On control bandwidth - thrust response is one thing. But a larger diameter also means more inherent stability of the platform (moment of inertia)."
Jul 19, 2011
Lauri commented on Matt's blog post Melbourne UAV meet
"Thank you!"
Feb 3, 2011
Lauri commented on Matt's blog post Melbourne UAV meet
"Are there any rumors on where the 2011 outback challenge will be held and whether there will be substantial changes to the open challenge?"
Jan 31, 2011
Jonathan Brandmeyer replied to Lauri's discussion Sensors on gas powered plane (vibration with IMUs, RF interference)
"Not that I recall. We had grand dreams of building our own autopilot, but back then I was managing the imagery system. We had some major issues getting the set of radios to work initially. GPS + WiFi + RC + RF modem was a challenge, but it was much…"
Apr 22, 2010
Jonathan Brandmeyer replied to Lauri's discussion Sensors on gas powered plane (vibration with IMUs, RF interference)
"If even one rubber band breaks, you will induce a large attitude error between the INS reference frame and the body frame. Yes, the other bands will keep the board from being damaged, but there will be some large angular error between the INS and…"
Apr 22, 2010
Lauri replied to Lauri's discussion Sensors on gas powered plane (vibration with IMUs, RF interference)
"Jonathan, did you face any issues with RF interference on your earlier tests (without metal box)? Is that a real concern with IMUs?"
Apr 21, 2010

ModeratorKrzysztof Bosak replied to Lauri's discussion Sensors on gas powered plane (vibration with IMUs, RF interference)
"Any single rubberband can break."
Apr 21, 2010
Jonathan Brandmeyer replied to Lauri's discussion Sensors on gas powered plane (vibration with IMUs, RF interference)
"You mean like this? That's a hard drive. Don't mess with what works once you've gotten it to work. Soft rubber grommets was used on the autopilot. Later on, we used rubber bands on the hard drive. From our perspective at the time,…"
Apr 21, 2010

ModeratorKrzysztof Bosak replied to Lauri's discussion Sensors on gas powered plane (vibration with IMUs, RF interference)
"You should have used double rubberbands then verify that single and double both provide accurate damping."
Apr 21, 2010

ModeratorHooks replied to Lauri's discussion Sensors on gas powered plane (vibration with IMUs, RF interference)
"Something like this could help you out. "
Apr 21, 2010
Jonathan Brandmeyer replied to Lauri's discussion Sensors on gas powered plane (vibration with IMUs, RF interference)
"1. As soft as you can get without sacrificing basic structural soundness. 2. For these sensors, it almost doesn't matter with respect to vibration. You don't want to propagate any engine vibration into the sensor chassis at all if you can…"
Apr 21, 2010
Lauri posted a discussion

Sensors on gas powered plane (vibration with IMUs, RF interference)

We're trialling an 5DOF Sparkfun IMU on a 50cc gas plane with less than great results. The sensor output with our EKF implementation works fine in normal conditions. However when the motor is started and real vibration comes into play, results are all over the place. The data just isn't good enough. The gas engine is attached to the firewall with rubber vibration dampeners. What are your experiences/thoughts on the following:1. How should sensors be attached to to the airframe (hard mounts,…See More
Apr 21, 2010
8 Comments
Lauri commented on automatik's blog post What's your screen resolution? - help GCS desing
"1920x1200"
Mar 15, 2010

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At 5:35pm on March 16, 2010, Morli said…
Welcome to DiyDrones Forum, Please introduce your self with your interest in this hobby, background etc. thanks

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