Questions tagged [quadcopter]

A quadcopter, also known as a quadrotor, is a multirotor helicopter that is lifted and propelled by four rotors.

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Quadcopter controlled by Raspberry Pi

I have: Raspberry Pi 3. Pi camera. CC3D flight controller. I have already developed a Python script that decides whether the quadcopter dron has to turn left/right, move straight on or to stop. Is ...
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3answers
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Is a larger Kv equivalent to more voltage?

I've been a fan of first person view drone Racing for years now and, in thinking of building a new quadcopter, I have a question I'm unable to resolve myself. Please correct me if I'm wrong: As i ...
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4answers
11k views

Using C++ to control a drone

I am relatively new to using drones and was wondering if someone more experienced in the topic could lend a hand. I am familiar with C++ and OpenCV, a facial recognition software that has libraries in ...
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1answer
208 views

BBC Micro bit PWM link to CC3D quad controller

I am trying to create the following set up as a project in education: QAV250 quad with CC3D controller 2xBBC Micro:bits used as the receiver, giving out 50 Hz PWM signals to the CC3D controller - one ...
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1answer
247 views

RC Transmitter for DIY

A couple of years ago I bought a WLToys V222 quadcopter. I would like to know if there is a way to use the transmitter to control some DIY projects? Does anyone know how I could do that?
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Using a different T/X on my quadcopter [closed]

I have a Bugs 3 quadcopter, can I use a better transmitter from a helicopter for instance, a 2.4 GHz?
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0answers
152 views

Why do my quad copter motors slowly decrease RPM with full throttle? [closed]

The flight controller is setup using LibrePilot, no propellers are fitted, when I put the throttle of the transmitter to full the motors go to full RPM and then slowly decrease to zero RPM with no ...
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2answers
2k views

Multicopter: What are Euler angles used for?

I hope you can help me and this is the right forum to ask. In the process of building and programming my own Quadcopter, I encountered the term Euler angles. I took some time to understand them and ...
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1answer
78 views

What's wrong in controlling Roll+Roll rate in a quad-copter instead of using 2 separate loops for each?

I am curious to know why we can't apply control algorithm like PID on the weighted signal of Roll and Roll rate in a quad-copter instead of using two loops to control them independently. Fundamentally ...
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2answers
231 views

Would the quad fly better with a 3S or 4S based on the weights of the batteries?

So the questions from the title is a bit hard to explain, so here is a better explanation of my question. I want to get into the FPV quad flying hobby, so I decided to pick up a very starter quad, ...
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1answer
1k views

2D quadcopter simulation position controller and PD controller

I'm a beginner in controls system, so if there is a nice tutorial on this, please let me know. I have a Simulink model like the following: It takes roll and pitch commands and output velocities and ...
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1answer
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Ardupilot on Raspberry Pi

I'm making a quadcopter for the first time and want to be as low cost as possible, and when it comes to flight controllers APM is the best open-source project, and is compatible with Raspberry Pi. My ...
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1answer
84 views

Problem with Coordinate Transformation

So I have a quad with a black-box estimator on it. The black box estimates the pose of the quad. I also have a Vicon system that I'm using to get the ground truth pose of the quad. I'm trying to ...
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2answers
93 views

Quadcopter flight controller - black smoke?

I bought a qx95 and after a few flights, maybe 3, there was black smoke that fizzled out of the what looks like the flight controller. And since then, anytime I give throttle - the fpv video feed cuts ...
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2answers
257 views

Euler Angles Order For Quadrotor Modelling

I am modelling a quadrotor and I need to choose an order for the rotations that transfer vectors which are represented in Earth Frame to the Body Frame. what is the most logical order for these ...
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1answer
449 views

Stabilising a quadcopter using YPR

I'm using the MPU-6050 accelerometer + gyro with the library I2Cdev which outputs: quaternion, euler angles and YPR angles. The equations used for calculating the YPR are: ...
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2answers
1k views

MPU9255 gyro data to roll pitch?

So I have -32768 to +32768 coming out from MPU9255 (gx,gy,gz) which is converted to 0-250 dps(degrees per second) using 131 which is Gyro's sensitivity. My question would be how do you use this data ...
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3answers
2k views

Does multiple IMU increase accuracy

I'm just starting up with IMU's and I really want to work on my own flight controller, but a question always hits my mind and I am not able to find answer anywhere, so I'm here. Will multiple IMUs ...
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313 views

Is it possible that a quadcopter hold height for long time stable only using IMU (without GPS) and barometer?

As we know, we can calculate altitude from barometer readings, and a UAV can hold height by referring to these data. However the real air pressure is varying with many conditions. These variance will ...
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0answers
275 views

Is it my PID that is unstable or my physical system? (Quadcopter)

I've been working on this Arduino-MPU6050 quadcopter for a while now, and it looks like it's close to being finished. I have programmed it in rate mode, so the PID's control the rotational velocity. ...
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1answer
408 views

MPU6050: Changing Gyro Output Range Throws off Positional Reading

I am using the MPU6050 in conjunction with an Arduino and Jeff Rowberg's i2cdev library, and my project requires that the gyro rate outputs be more precise than the default setting, which is 1/16.4 of ...
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1answer
225 views

unstable quad with naza m lite

I almost finished my first quad and first time it just flipped(the back over the front 360 degrees)...the motors and props are installed correctly..i triple checked but i'm still a noob in this...my ...
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2answers
2k views

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

I am building a quadcopter using the tutorial The Ultimate PVC Quadcopter. When ever I go to lift off, at full throttle, the motors spin but the quadcopter doesn't go anywhere. I have checked again ...
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1answer
32 views

Recording GPS position [closed]

I build 3d models using Agisoft and need to record the position of the Ground Control Points as accurately as possible, latitude , longitude and altitude. What is the best way of doing this?
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2answers
544 views

Explanation of Quadcopter Dynamics, Components and Control

I am about to build my own quadcopter from scratch. However i am having problem with understanding how it is possible to control the quadcopter without knowing the current rpm of the BLDC motors. ...
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0answers
279 views

How do I hack RC transmitter of my drone by realised communication with my PC? [closed]

I have a Chinese drone (cost less than $100), that works with a 2.4Ghz transmitter of 2.4. I am trying to build an application in C++ to control the drone with PC. I am thinking of using an ARDUINO ...
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1answer
1k views

which is best IMU for Quad-Copter [closed]

Actually i am trying to write my own Flight Controller for Quad-Copter that is controlled by Remote over radio signals.So for a flight controller i have to buy a inertial measurement unit(IMU).So ...
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1answer
3k views

How to find state-space representation of quadcopter?

I want to design a linear controller for a quadcopter which is 6dof nonlinear. I have non-linear equations. But in order to design a linear controller, I need to find a linear state-space model of ...
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2answers
325 views

Can high voltage power lines provide a super highway for drones?

Is there a way to convert the EM field that surrounds high voltage power lines for direct usable electricity for air or ground drones for continuous flight or travel? Added: Yes could the EM field be ...
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1answer
60 views

Locate a quadcopter in x,y space [closed]

I have a quadcopter using image processing to detect shapes on the ground to the determine x,y position. It works ok. My problem is that if the illumination isnt perfect. I would like to know if ...
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3answers
866 views

remote controlled quadcopter : Why is it not possible to send all the commands over one channel?

First of all, this might be a stupid or bad question but i am quite new to this topic. I want to build a rc transmitter (with some joystick buttons, an arduino and a hc-12 transceiver). I've searched ...
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2answers
944 views

Possible stabilize Crazyflie 2.0 drone autonomous flight without additional sensors?

I just bought the Crazyflie 2.0 drone. This is my first drone, and it is my first time programming a drone. My first goal is simple: Make the drone hover in place stably for 10 seconds. I found a ...
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0answers
184 views

How can i get the Laplace Transfer function for control process for quadcopter?

I'm a beginner for quadcopter construction with PID controller and PIC 16F877 microcontroller. Now, I'm troubling with how do make the control process with mathematical model for my quadcopter :( and ...
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1answer
373 views

How to make RRT to work for dynamic systems?

I want to make path planning algorithm for a quadrotor with RRT in my thesis. I have searched lots of articles and come up with the concept of "dynamic RTT" and one of the articles has a title "...
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2answers
2k views

Cascaded PID in Quadcopter control

I'm working on diy flight controller for quadcopter. I have a question for which I can't find a good answer. So perhaps you could help me. I'm using a cascaded PID controller for Pitch and Roll ...
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3answers
363 views

Paradox: I can't use accelerometer measurements to obtain information about my states in a quadcopter?

I'm currently developing an EKF to estimate the position and orientation of a quadcopter. My state vector is comprised of 3D position, 3D velocity, 3 euler angles and the angular velocity vector. ...
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1answer
190 views

Implementation of the Control of a Quadrotor, as taught in Aerial Robotics in Coursera [closed]

I completed the course of Aerial Robotics in Coursera and I want to implement what I learned in a real quadrotor. The thing is that when I see the equations given like this: For the sake of the ...
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1answer
924 views

What kinematic equations should I use for Kalman filter state propagation in IMU based quadcopter navigation?

I am working on implementing a Kalman filter for position and velocity estimation of a quadcopter using IMU and vision. First I am trying to use the IMU to get position and velocity. In a tutorial [1] ...
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1answer
878 views

How to implement PD controller to this 2D planar quadcopter dynamics?

I want to code the dynamics of 2D planar quadrotor and than control it to drive it from one state to another. Dynamics that I use is taken from the online course fiven by Vijay Kumar in Coursera as ...
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1answer
144 views

Cleanflight : 4 first channels not working and "Failed to open serial port"

I just finished assembling my new 250 quad which is equipped with an SP F3 Flight controller. I think that I kinda bricked my FC in the first 10 minutes of configuring it: I first plugged it in, ...
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1answer
2k views

Multiple robots in ROS Gazebo SITL with separate MAVlink/MAVproxy codes

Background: This question is about simulating one ErleCopter and one ErleRover simultaneously for a non-commercial research. I would like to have the quadcopter follow a rover, which in turn is to be ...
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0answers
85 views

Quadcopter takeoff when low throttle /w PID

I'm making my own quad controller from scratch. I have fixed one axis on a "pendulum" so that only one axis can move freely ( + mode). Let's say that I have 0 throttle. As you know PID output is added ...
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0answers
133 views

Using an AR.Drone's IMU to perform PDR

My task is simple: I want to move my drone manually around a room (IMPORTANT: I DO NOT WANT TO FLY IT) and I want to see its position update on a map using IMU data. I've attempted something in ROS ...
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1answer
955 views

Stabilizing a Drone

I have my IMU and I can get attitude (pitch, roll, yaw) as well as gyro (x, y, z) As far as I can tell, ...
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0answers
70 views

How to precisely land a copter in a defined place? [closed]

Say, I have a flat square landing place for a copter, made of e.g. aluminium or plastic, with marks on it making a square, looking like this from the top: ...
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1answer
55 views

Can I use a 3D gimbal system as a simplistic quadcopter IMU(3 axis accelerometer)?

i have 3d gimbal system and i want to use this sensor in place of IMU(3 axsis accelerometer) in Quadcopter
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1answer
274 views

3 Axis Gimbal Stabilization System can replace with 3 Axis Accelerometer

i have "TAROT ZYX-GS 3-Axis Gimbal Stabilization System ZYX13" sensor that gives me the value of Roll tilt and Pan.The 3 axis accelerometer give me the value of x y and z.so can we use the Gimbal ...
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1answer
746 views

How do I interface with a drone?

I recently bought a drone(quadcopter). I like how the drone works but now I would like to create an application that will allow me to control the drone remotely from my PC or Phone. How does a ...
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1answer
63 views

battery question for DW558 Explorer (small quadrocopter)

I recently bought a DW558 Quadrocopter (http://www.gearbest.com/rc-quadcopters/pp_110531.html). After few minutes, the battery is dead. Which is understandable since the battery is so tiny. It is a 3....
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1answer
97 views

PID Gains: Drop in control loop rate, need to retune?

Good Day, I am working on an autonomous quadcopter. May I ask if there is a significant difference if my control loop dropped from 500Hz to 460Hz due to added lines of code that would require ...

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