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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99 views

c++ Library for trajectory correction

I have a trajectory of a quadcopter in 3D. Out of all the poses in the trajectory, I want to correct one of the poses. I then want to adapt the rest of the poses based on the newly corrected pose. I ...
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2answers
1k views

BetaFlight sees motors working, but motors not spinning

I am using FlySky i6 Transmitter and a FS-iA6B receiver. I have it set up using PPM and BetaFlight recognizes the motors in the Receiver section. All the values adjust according to the toggles and ...
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1answer
68 views

Can quadcopters save energy by flying in formation?

If two or more quadcopters are aligned, would the effect of drag due to the lead quadcopter's slipstream lead to measurable energy savings? And if so, how would one determine the optimal distance ...
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84 views

More than 6 cameras in Nvidia Jetson boards

A recent startup named Skydio develops autonomous drones for photography. The drone is named as R1 and utilizes 13 cameras to map its surroundings for localization and motion planning. The brain of ...
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1answer
75 views

Doing a project for college for a manned drone theortically only

Weight of the Drone in total will be 240 Kg. It Will be a quad copter drone setup but with 8 rotors(two on each corner) for redundancy purpose. Aim is achieve Thrust/weight ratio of 2. So need total ...
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324 views

Quadcopter mathematical model and controller design

if we just examine the translational dynamics (X and Y direction), the dynamics are coupled, So if I want to design a PID controller to control the position, the outcome will be unpredictable because ...
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1answer
27 views

Drones classification based on flying mechanism and communication link

I am confused about autonomous drone flight. Thats why I am asking the question here so that a drone expert can help me to understand. I have heard about tow kinds of drone drones that work through ...
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2answers
72 views

Compatibility of my quadcopter build

I am building my first quadcopter and have multiple questions. I am using a Crius MWC Multiwii SE 2.6 flight controller which will get input from a Raspberry Pi Zero. I have this 4in1 ESC and this ...
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Quadcopter bldc PID control

Working on stabilizing a Quad using Arduino Due. I have slightly modified one of the examples of Jeff Rowberg's library to give yaw, pitch and roll angles (zero initialized angles). Moreover, I am ...
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1answer
578 views

Multiple antenna styles on FPV without true diversity

I did a search and couldn't find a site that stood out as RC. I was hoping you guys would be closest. Here's my question. I bought a set of Eachine EV100 FPV goggles. Every resource I've looked at ...
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263 views

Treatment of euler angles in quadcopter control

In most implementations of quadcopter control systems I've seen, each axis of the quadcopter is controlled independently. For example, to control the rate in the roll axis, the desired output is ...
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0answers
37 views

how to get velocity of Ar drone 2.0

i have question about AR Drone 2.0. i am using ROS Gazebo and Python. my question is how to get velocity of quadcopter? i need velocity to count position of quadcopter. Thankyou.
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330 views

Quadcopter stable with angular velocity but not with absolute angle

I'm making a flight controller for quadcopter. It is very stable when regulated by angular velocity, but it is horrible when regulated by angle. What are the potential problems when regulating a ...
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0answers
101 views

Quadcopter with wind effect

I drawn the Simulink model of a quadcopter with virtual joystick input and now I want to add the wind but I am little bit confused how to add wind with that model. actually my model is like that input ...
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1answer
35 views

Find IMU based on previous works [closed]

I'm building a quadrotor robot and my supervisor has asked me to make a report of the IMU modules used in previous works, I couldn't find such reports however. Does anyone know how to find such ...
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2answers
373 views

Receiver is getting really hot

I am building a quadcopter and I am on the last part of it (normally the exciting part) where I bind the controller to the receiver. I can get the receiver, which is plugged into the quadcopter, to ...
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2answers
574 views

How do I tune the cascaded PID controller in my flight controller?

there is a lot of information out there on how to tune quad PID parameters. However, they mostly regard only the master loop that takes user input and fused absolute angles. How and in which order do ...
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1answer
623 views

MPU6050 inconsistent Gyro data

I'm using an MPU6050 for a custom flight controller and I am facing an issue when reading the values from the IMU. The data shown below represents the angular velocity in the y-axis. When the angular ...
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1answer
151 views

Quadcopter stabilisation

I recently built a quadcopter and programmed a code to stabilise itself. The copter takes the hight from a distancesensors and the angle from a MPU 6050 gyro and accelerometer with a complementary ...
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0answers
857 views

How can I send commands from raspberry pi model 3B to Seriously Pro 3 Flight controller? [duplicate]

I am trying to make a quadcopter that receives commands from my android mobile phone. I currently have the following: Raspberry Pi 3 Model B running on Raspbian. Pi Camera Seriously Pro F3 Flight ...
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1answer
516 views

Quadrotor 2D Dynamics

I am trying to understand the control of the quadrotor in 2 dimensions from the Penn course on aerial robotics. The attached image describes the linearization of the control efforts assuming that the ...
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1answer
333 views

Quadcopter filter and Angular rate vs angle (Arduino programming)

I wrote an Arduino program for my quadcopter that sets to power of the 4 ESC's using software. Now I need to incorporate the gyro and add a "Complementary Filter" to stabilize it. I am currently ...
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1answer
85 views

integrating perfect rate gyro data (noiseless)

Having a perfect gyro (with no noise/drift or bias), the gyro produces angular velocities in the form (wx, wy, wz) in rad/sec. I would like to convert the rate gyro readings (which are expressed in ...
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1answer
110 views

How do i figure out how much thrust an 150cc Size Brushless Outrunner Motor will output with propellers? [duplicate]

I need to know this as i'm trying to figure out if two of these could lift approximately 170 pounds of wheight. And that's includig batterys and the motors.
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1answer
160 views

Quadcopter holding algorithm

I am working on a project related to quadcopter. I have also build a algorithm based on PID controller for controlling climb sink rate and also holding but it did not work correctly. My function to ...
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0answers
147 views

How to create a Position controller for a Quadrotor

I have a controller that uses Theta,Z,Psi and Phi as a command. Now I want to create a position controller so that I can command a trajectory. I have checked a similar question raised in this attached ...
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1answer
94 views

Quadrotor SE3 Controller: Calculating Rd_dot

I am trying to simulate and implement the controller in the paper Geometric Tracking Control of a Quadrotor UAV on SE(3). I have the dynamics implemented, however I am stuck at one part in the ...
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2answers
54 views

How can I protect my props from being damaged?

I have a quad copter and I'm developing my own flight controller to run the code and testing it on the quad. As you all must be knowing, this means a lot of broken propellers. I thought of making a ...
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1answer
2k views

Quadcopter motor fails beyond 50% throttle

I have recently build a quadcopter with the following specs:- KK mini board 4 x A2212-1000kV / 13T motors 4 x 30A ESC 2200mAh 25C 12.5V battery The issue i am facing is that once the throttle ...
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2answers
752 views

Quadrotor Dynamics: Calculating angular velocity of quadrotor

I am trying to simulate and implement the controller of the paper Geometric Tracking Control of a Quadrotor UAV on SE(3). To do this I need to first implement the dynamics of the quadrotor. According ...
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0answers
64 views

Integrating Instantaneous Accelerations taken at discrete time intervals

I am trying to integrate instantaneous linear and angular acceleration taken at discrete time intervals (1/100 seconds, 100hz). data is collected beforehand, and integration is done offline, I only ...
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2answers
161 views

Cmake Error While Buliding Pixhawk simulator

I am trying to run "px4 SITL simulation" using gazebo7 on my machine with "UBUNTU-14.04 LTS" using these commands: ...
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1answer
37 views

What kind of sensor do quadcopter uses?

over the last 5 years I had 2 quadcopter as a gift. the first one was basic, manual, I had to manually set the 4 motor speed for it not to crash during take off and I was alway controlling the amount ...
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1answer
489 views

Build a drone with a raspberry pi 2 as receiver for the CC3D-LibrePilot

I tried to get the yaw, roll, pitch and throttel integers from the pi to the CC3D with python and c++ as PWM signal over the GPIOs but the output didn't seem to be right or it was delayed. Could ...
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1answer
116 views

Setting initial conditions in a quadcopter numerical simulation

I am new to robotics, and currently trying to develop a purely numerical simulation of a quadcopter. As I understand, the problem of quadcopter control includes take-off control, hover stabilization ...
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0answers
104 views

Drone Feedback: Object Detection / Color Detection [closed]

I have been working on a code where an A.R Drone 2.0 will detect color and put a red dot in the middle of the image. I am using streaming for the drone. The goal is for the drone to detect a white ...
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1answer
78 views

Is it possible to achieve control of 4 DOF in quadcopter?

I have been looking into non-linear control algorithms for controlling a quadcopter. I know that we have total 6 DOF for a quad (3 translation and 3 rotation) and our input belongs to $\mathbb{R}^4$, ...
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3answers
141 views

State vector for a Quad-copter?

Whatever literature I've read on quad-copter dynamics, the state of a quad copter is define as a 12x1 vector, containing the coordinate positions (x,y,z) and velocity (xdot, ydot, zdot) in Earth frame,...
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1answer
898 views

Correct Quadcopter Yaw control implementation

I have built a quadcopter from scratch, including my own flight controller. I have implemented a sensor fusion algorithm (Madgwick algorithm), which returns me current Yaw, Pitch and Roll angles. ...
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109 views

How to include a space and robot geometry with OMPL

Let us assume that I am able to create a 3D map (octree) based on information gathered by a Lidar and/or a camera on a quadrotor. Now based on the current 3D representation of the world, I want to go ...
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1answer
93 views

Doppler effect in long distance communication using 868MHz band for telemetry signals

I am working on a project which involves multiple quadcopters working about 5 km away from the ground control station. The communication is planned to be done using RFD868+ modules on each of the ...
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4answers
225 views

How to get longest flight time on octocopter that has decent payload already on it?

I want to design an octocopter that will respond to incidences of crime and terrorist attacks. Survey and gather intel and come back to HQ. I have used a 16000mAh 6S lipo battery with no lead, but ...
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1answer
188 views

How do timings affect input, sensor fusion, and output?

I'm programming a quadcopter controller. I've managed to make it fly. But, I'm not sure how to set up the timings schedule for each part of the software. I have several sensors (gyro, accelerometer, ...
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1answer
279 views

Generation of a trajectory (position,velocity,acceleration) from velocity

I would like to generate a trajectory for a quadrotor UAV and I am using an architecture which allows to do so only by specifying position, velocity and acceleration. I only know that I want to do a ...
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2answers
56 views

How to find a smartphone with a quadcopter?

I think there are some quad-copter at the market those can find you from your smart phone. I don't know how accurate it is and how does it works? Is there a solution that I can build an android/ios ...
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2answers
328 views

Simple relation between lifting weight and power of the motor in quad-rotors?

I like to know are there simple equations to find how much motor power is needed to lifting 1 KG with a quad rotor? Also if we use gas powered engine, how can we find a relation between lifting weigh ...
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1answer
86 views

Quadcopter Flat Surface Roll Pitch angle not 0 Degree

At 11:13 or 2:22 of this video or 0:09 of this second video the drone itself is on flat surface but the flight controller itself must have been placed in tilted position (not intentionally) on frame a ...
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1answer
457 views

CC3D connector cable connection with receiver

I am trying to make my First Quadcopter but having problem with cc3d connection, The CC3D cable seems extremely complicated. I would have figured the pin out would have started with a red/black/white ...
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0answers
206 views

How to make ROS enabled Quadrotor with raspberry pi? [closed]

I am working on a project "ROS enabled Quadcopter", and am using hector_quadrotor package. But I am facing problems in Flight controller. My world and quadcopter is running in gazebo but I don't ...
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1answer
3k views

Thrust and Torque on Quad Rotor

I am a beginner on Drones. I would like to understand the how each motor contribute to thrust on the whole drone. And what is the direction of torque created on each propeller. Everywhere I find a ...

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