I'm trying to build a drone(Helicopter). I'm looking for advice on controlling a UAV that I'm attempting to build using 3 brushless motors from one transmitter.Think of my model looking like the letter "Y" and have a motor at each extremity and the control in the middle of the "Y" frame structure.1) do I need one brushless ESC per electric motor?2) how can I control the power to each motor.3) Is there receivers that can have 3 motor controlsI'm new to R/C and I would appreciate any help i can get..Books, links, dev boards etc???Thank youAndre
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Meh, I'd steer clear of Crazy Jack.... not worth the trouble
There are a number of quad and tri-rotor projects out there. Check out this forum (but ignore the coaxial and 2 rotor projects, those are fairly different from this sort of thing). Specifically I'd recommend checking out the Quaduino project.
Most projects of this type use a fly-by-wire setup. Your reciever isnt directly connected to the ESCs. There is a microcontroller in between stabilizing the flight. Pretty easy to have a microcontroller output the PWM signal that tells the ESC how much power to give the motor. The control algorithms and all that can get pretty tricky.
There might be a tri-rotor project that gets away with just using heli gyros and no uC...
First you have to understand that this configuration is not inherently stable.
You'll need active stabilization (two gyros and a computer).
Second, this configuration is not capable of being stable as you describe it. You'll need to add a servo tow twist one of the motor arms (or use a quad).
Quads can compensate for rotational torque drift by moving thrust from one set of counter-rotating pairs to the other, a Y can't do this, so you'll need a twist servo to compensate for drift - or initiate a yaw turn.
I believe there are open projects along this line, you might look up quadrotors, and start there, what you describe is a variant.
Q1 yes
Q2 with a Tx/Rx very small computer,MEMs gyros, software for the computer(you must write for your application).
Q3 Receivers handle channels. It's up to you what you plug in to them.
Q? Yes you can. You need to start smaller or spend a lot of money for a quad rotor system. Sparkfun for parts. Time for knollege
Experience for skill. Time + Work+Money=What you want.
Best to have 3 ESCs for - 1 for each engine. Then connect with a 3 by Y harness for syncronized control. This will allow 3 servos to connect to 1 receiver input - i.e. throttle. Or use a JR Match Box to do the same thing....
Replies
There are a number of quad and tri-rotor projects out there. Check out this forum (but ignore the coaxial and 2 rotor projects, those are fairly different from this sort of thing). Specifically I'd recommend checking out the Quaduino project.
Most projects of this type use a fly-by-wire setup. Your reciever isnt directly connected to the ESCs. There is a microcontroller in between stabilizing the flight. Pretty easy to have a microcontroller output the PWM signal that tells the ESC how much power to give the motor. The control algorithms and all that can get pretty tricky.
There might be a tri-rotor project that gets away with just using heli gyros and no uC...
Good luck! Its all very doable, but no easy task.
You'll need active stabilization (two gyros and a computer).
Second, this configuration is not capable of being stable as you describe it. You'll need to add a servo tow twist one of the motor arms (or use a quad).
Quads can compensate for rotational torque drift by moving thrust from one set of counter-rotating pairs to the other, a Y can't do this, so you'll need a twist servo to compensate for drift - or initiate a yaw turn.
I believe there are open projects along this line, you might look up quadrotors, and start there, what you describe is a variant.
Q2 with a Tx/Rx very small computer,MEMs gyros, software for the computer(you must write for your application).
Q3 Receivers handle channels. It's up to you what you plug in to them.
Q? Yes you can. You need to start smaller or spend a lot of money for a quad rotor system. Sparkfun for parts. Time for knollege
Experience for skill. Time + Work+Money=What you want.
Check out Jack Crossfire.