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controlling rotor speeds with higher precision

Started this discussion. Last reply by damian Sep 19, 2012. 6 Replies

hi all,(cross-posted from Aeroquad forums) i'm looking to create a quadcopter-based 'art' object. for it to do what i need, i'm going to need some fairly precise control over the speeds of the…Continue

 

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damian replied to damian's discussion controlling rotor speeds with higher precision
"yeah, i think it's hard to 'get' the Ray Lee thing unless you've seen it in person. all the speakers on spinning sticks are tuned to the same base note and by rotating they set up a shifting pattern of overtones based on where…"
Sep 19, 2012

Developer
R_Lefebvre replied to damian's discussion controlling rotor speeds with higher precision
"Hmmm... I don't really get that youtube video.  What is he doing?  I just see speakers on spinning sticks. Are you sort of thinking of this type of thing (skip to 0:55) ? http://www.youtube.com/watch?v=1JPBdBIFGNQ"
Sep 19, 2012
damian replied to damian's discussion controlling rotor speeds with higher precision
"hi Dan, no it's more a musical effect i'm going for, but thanks for the reply. cheers damian"
Sep 19, 2012
damian replied to damian's discussion controlling rotor speeds with higher precision
"thanks, yeah i gathered asking the APM to do this as well as governing everything else would be too much, that's not a problem. so to give away the details, the plan is to use the physics of hovering flight to drive a musical drone composition,…"
Sep 19, 2012
DanRZ replied to damian's discussion controlling rotor speeds with higher precision
"Hello, maybe i'm wrong but he surely wants some "stroboscopic effect". And so he needs to control very precisely the rpms to get the right effect ... If this is what you need, you have inverted the problem. Let the rotor turn the…"
Sep 19, 2012

Developer
R_Lefebvre replied to damian's discussion controlling rotor speeds with higher precision
"Damian, what you're doing sounds interesting.  Do I understand correctly that you want to put a controller in between the APM and your ESC's that would force the motors to vary their speed in steps instead of linearly? I think what…"
Sep 19, 2012
damian posted a discussion

controlling rotor speeds with higher precision

hi all,(cross-posted from Aeroquad forums) i'm looking to create a quadcopter-based 'art' object. for it to do what i need, i'm going to need some fairly precise control over the speeds of the propellors. without going into details, i want to be able to quantise the propellor speeds precisely (+/- 1%) against some pre-determined spread of allowed speeds (the spread would be reasonably fine grained: at any given rotor speed the neighbouring options would be within +/-10%). i have a couple of…See More
Sep 19, 2012

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