4 votes
Accepted

DualCopter Degree Of Freedom

A dualcopter, of the form you are talking about, can control all roll, pitch, yaw and it's altitude. To do so, it employs two rotors running in opposite directions to cancel any torque. This would ...
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4 votes

How would i go about learning to code a flight controller?

Controlling a flying robot (or anything else) is a very complex subject (well, people are doing PhD on it..). I can recommend this free online course on the subject (I have taken it myself). It will ...
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3 votes

Quadcopter Charging

The best way to manage power redundancy for autonomous systems is a really interesting topic. There are two classes of power needed. Flight and processing. Often the power required for flight is ...
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  • 4,205
3 votes
Accepted

In how many ways can a six propellers drone fly or rotate?

practice In practice, every multicopter (including 6-propeller hexacopter and 4-propeller quadcopter) that I've seen so far has 4 degrees of freedom: pitch, roll, yaw, and climb. The minimum number ...
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  • 4,375
3 votes

How would i go about learning to code a flight controller?

The course suggested by @Eugene Sh is a good one to understand in depth the relevant details. If you have general idea about how an aircraft (fixed wing) operates it will be actually helpful to you. ...
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  • 131
3 votes

DualCopter Degree Of Freedom

A quick google search yields this video of an RC dual copter that looks like it is able to control its pitch, roll and yaw: https://www.youtube.com/watch?v=_cwCHgmDbz0 Skip to 5:50 for the part ...
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  • 183
3 votes
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Why can't i use different ESCs together on a multirotor?

Ideally, when you raise the collective all the way up, all the ESCs put out their max power and the quadcopter goes straight up. Different ESCs will end up producing different maximum thrusts; and ...
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  • 4,375
3 votes
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Will a 20amp ESC run a Turnigy 2213-980?

In process of selection of components for multirotor, one should start from motor as it is the driving component. Maximum current drawn by your motor is given by manufacture which is 15A. Now your ESC ...
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  • 633
3 votes
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Does it matter if my electronic speed controllers are close to my brushless motors?

First, you can look at Mikrokopter as an example of quad with centrally mounted ESCs. As for the various engineering reasons for ESC location, here is some rationale behind the two you mentioned 1) ...
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  • 2,669
2 votes

Can a rigid-prop quadcopter hover upside-down?

You can run a brushless DC motors backwards using a H-bridge. Basically you'll need to program your microcontroller/microprocessor onboard to flip the polarity of 2 of the wires of the bldc (a bldc ...
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  • 271
2 votes

Our quadcopter goes forward instead of hovering in place. How to correct it?

You seem to be controlling the quadrotor's attitude (roll, pitch) to (0, 0) and not its position. What you are seeing is drift in position, which is inevitable if you do not control the quadrotor's ...
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  • 629
2 votes

Our quadcopter goes forward instead of hovering in place. How to correct it?

There are quite a few possible explanations for the instability, I'll try to list 'em: PID settings are off the mark. I'm not familiar with KK2.1.5 Multi-Rotor controller, but I'm sure there will be ...
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  • 409
2 votes

Quadcopter: Stabilization along the z-axis (for holding altitude)

Two approaches are possible: Combine the altitude (GPS or pressure) and vertical acceleration sensors' data to calculate a better geometric altitude, and tune your vertical controller using this ...
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2 votes
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Quadrocopter build - Do these parts look fine?

Since your frame is about (220g + other parts' weight), you need to make sure that your 4 motors give you a combined thrust of atleast 100 g more than, just to get off the ground and maneuver. ...
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  • 271
2 votes

Why do the motors of my quadcopter not deliver sufficient power?

If I'm understanding you correctly, you are saying that the motors spin, but they don't spin fast enough to generate enough thrust to get the drone off the ground. It sounds to me, if this is the ...
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2 votes
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How would i go about learning to code a flight controller?

Seeking proficiency in C++ or in OOP in general would either have to be a result of obtaining the necessary knowledge in order to browse through the code-base of the flight controllers that you ...
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2 votes
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Ardupilot on Raspberry Pi

Firstly, you may be confusing ArduPilot/ArduCopter software with the ArduPilot Mega (APM) hardware platform. ArduPilot/ArduCopter is indeed a great piece of software and is still maintained. The ...
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  • 1,284
2 votes

Multicopter: What are Euler angles used for?

Your own equations make a lot of assumptions about the problem you are trying to solve. They are sufficient to solve your problem, but will not work for certain conditions (z = 0 for instance). ...
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  • 4,205
2 votes
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Interference caused by multiple robots during task completion

I came across one paper that had a good description of this issue from Kristina Lerman and Aram Galstyan at University of Southern California entitled "Mathematical Model of Foraging in a Group of ...
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1 vote

Why do the motors of my quadcopter not deliver sufficient power?

Either the battery levels are low or the flight controller hasn't been set up yet. First, calibrate the flight controller sensors. After, Calibrate the ESCs. (Do this without props!) Then set up the ...
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  • 248
1 vote
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Need the uav to perform a circle turn

A possible approach would be to construct a virtual potential field, which is tangent to your desired circle and use it for reference (target) orientation (yaw angle). There is an algorithm for a ...
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  • 510
1 vote

Quadcopter Charging

Would the answer not just be a make-before-break DPDT relay/toggle controlled by whatever (microcontroller, flight controller, etc.) is monitoring battery voltage? If ...
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  • 14.5k
1 vote

Quadcopter Charging

I think it would be feasible. There are multiple examples of power distribution boards which allow for dual batteries. If you use such a device, you can leave the multiple input managment to it, ...
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  • 510
1 vote

Compatibilty of my setup?

The website that you have used seems to be down, however looking at the specs announced on banggood, it looks compatible. You would need some 8*4 props and a 3S battery, I'd advise getting a 3000mAh ...
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1 vote
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Controlling an ESC for Brushless Motors with an RPi

Operating an ESC is practically the same as operating a servo. The main difference is that instead of the pulse width translating to a position on the servo, it translates to an output speed. The ...
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  • 1,027
1 vote

How to attach a motor to a blade?

Which piece is the robot? This is not a robotics question. I have to assume since you are asking a question that shows a lack of fundamental mechanical understanding, that for its intended use, ...
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  • 2,013
1 vote

How would i go about learning to code a flight controller?

Steps one should take to eventually write a flight controller software: Step 1 Learn the mathematics and physics laws behind the airplanes, helicopters, multi-rotors, etc. Step 2 Learn electronics. ...
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1 vote

Unable to hover my quadcopter

This would be a hack, but you could add a small amount of weight to it so the tick that makes the quad ascend slightly would now be the hover tick.
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  • 306
1 vote

Quadcopter: Stabilization along the z-axis (for holding altitude)

Cannot comment yet. I would add a gyro and use a complementary or Kalman filter. Accelerometers are right, on average, but wrong, right now. Gyros are right, right now, but are wrong, on average. The ...
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  • 156
1 vote

Will a 20amp ESC run a Turnigy 2213-980?

The motor/esc pair you selected look fine. However, you should probably use a larger battery. 2.2 Ah * 25C = 55 amp continuous current draw. Each of your motors is rated 15 amps, but the speed ...
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  • 420

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