Questions tagged [quadcopter]
A quadcopter, also known as a quadrotor, is a multirotor helicopter that is lifted and propelled by four rotors.
419
questions
1
vote
0answers
15 views
How to estimate yaw angle from magnetometer and gyroscope?
I'm using the MPU9250, it measures acceleration, magnetometer, gyro, etc. Complementary filter tutorial for this is here, however this tutorial does not have a magnetometer and I do, thus I thought I ...
0
votes
0answers
26 views
Are all drone propellers compatible with all brushless motors?
I want to build a drone using these motors
https://www.banggood.com/Wholesale-SunnySky-X2212-KV1400-Brushless-Motor-For-RC-Models-p-60577.html?cur_warehouse=CN
and these propellers
https://...
0
votes
0answers
25 views
Quadcopter motors not spinning
I made a quadcopter with an Arduino and all connections are fine. When I arm it, the motors spin without props but when I connect the props and arm it, the motors spin for a second and stop. Can ...
0
votes
1answer
53 views
A Delivery Drone
I'm building a delivery drone as my final year project. A drone that can deliver a package to offices around my small town autonomously, for my final year project.
I would like to know how this drone ...
0
votes
0answers
23 views
Planning minimum snap trajectories
I am working on motion planning algorithm for quadrotor. As I have learned in Coursera Aerial robotics course, trajectories for quadrotors should minimize snap which is equivalent to interpolating ...
0
votes
1answer
37 views
Are these parts compatible to build a quadrone?
I want to build a quaddrone from scratch, without using ready made controllers. I've read a lot about drones, how they fly and what essential parts they should have.
So I decided to make my own ...
0
votes
0answers
15 views
Calculation of quad-copter
Vector rotation around X-axis can be represented as:
Rx = \begin{bmatrix}1&0&0\\0&cos(\alpha)&sin(\alpha)\\0&-sin(\alpha)&cos(\alpha)\end{bmatrix}
Vector rotation around ...
0
votes
0answers
15 views
Doubt linearizing 2D planar quadrotor equation of motion
Equation of motion for 2D planar quadrotor are as follows
$\ddot{x} = \frac{1}{m} (u1+u2)sin(\theta)$
$\ddot{y} = \frac{1}{m} (u1+u2)cos(\theta) - mg$
$\ddot{\theta} = \frac{r}{I} (u1+u2)$
How to ...
0
votes
0answers
11 views
Improve altitude control on an outer loop PD controller for a UAV
I'm playing around with using PID control as an outer loop control for the position of a DJI drone in a Hardware in the loop simulator.
I have three separate controller instances for each axis x, y, ...
1
vote
0answers
18 views
Mission Planner: How to create a custom Waypoint Command
I am trying to set up a waypoint in Mission Planner that causes the drone to hover, take sensor data from a custom sensor, then either land or continue hovering based off of what the sensor data says. ...
0
votes
2answers
52 views
Drone Mapping Project
I'm mapping my college campus with a drone (as part of an approved science project). I want to film, measure the temperature, and take infrared video at the same time. What drones are good for ...
1
vote
2answers
45 views
Can P gain too high cause roll of death?
I've been sperimenting with PIDs on my quadcopter and I've noticed that pitch P = 65 causes double front and back flips which looks like a roll of death (or in this case a flip of death) and lowering ...
0
votes
1answer
30 views
Image based visual servoing for quadrotor forward flight
I'm still trying to understand how to implement image based visual servoing (IBVS) for quadrotor. The control laws seem straightforward if you want to use IBVS to track a feature in the image space at ...
0
votes
1answer
33 views
Improving PID gain constants
I have started building and programming my own quadcopter. I used stm32 f103 and right now I'm testing PID controller. The issue is getting right gain constants. I have build a swing and attached ...
0
votes
2answers
54 views
Dropping a box from a quadcopter
I am trying to estimate when and where to release a box carried by a delivery UAV such that it falls on a given target. I need to take the wind speed/direction into account. (See the visual below for ...
-1
votes
1answer
54 views
What the best roadmap to learn building and programming drones in the deepest level? [closed]
I want to learn how to program the drone in C without using the available libraries and platforms. I want to be able to understand how everything is set at a fundamental level(SRAM). Also, I want to ...
1
vote
0answers
46 views
Kalman filter to fuse ultrasonic altitude sensor and accelerometer
I'm a little confused on how to set up the Kalman filter matrices to fuse an ultrasonic altitude sensor and accelerometer from IMU. I am trying to implement this for a quadcopter. And what I'm ...
0
votes
0answers
12 views
How to translate individual rotor trust to Wrench object in ROS (force&torque)
I am learning about ros and dronesim Basically following this.
There is a wrench object where I can create with force and torque vectors. My question is how can I translate individual rotor trust to ...
0
votes
1answer
95 views
How to use depth map in A* path planning?
I've currently built a quadrotor with standard PID controllers for attitude, angular rates, and position control. I now want to implement obstacle avoidance and path planning using A*. I have a stereo ...
0
votes
2answers
88 views
How a quadcopter pitch/roll impacts thrust?
I'm thinking about how a quadcopter flight controller works, and I usually see that each motor speed is determined by a formula like:
...
1
vote
3answers
171 views
Quadcopter motors vibration problem
I built an Arduino Due based quadcopter, with MPU-6050 for auto levelling and BMP-085 for Altitude.
I am using Kalman filter code from here for the MPU-6050 to take the Roll and Pitch angels from the ...
1
vote
2answers
75 views
Why do we need to design controllers (feedback) for controlling a quadrotor?
For example if I want to make my quadrotor hover at a particular height, can't this be achieved by using an altitude sensor, and to correct it's position due to disturbances, can't we just write some ...
1
vote
0answers
26 views
Naze32 flight controller not connecting to RC
Cleanflight reads my Naze32, but the RC values aren't responding at all. Everything is connected and double checked that the wires were connected properly and firmware was flashed. Just not getting ...
-2
votes
1answer
69 views
Arduino based quadcopter flipping problem [closed]
I have built an Arduino DUE based quadcopter and I am using HC-12 as a transmitter and receiver between my laptop and the quadcopter. What am I doing is just send a speed value from my laptop and ...
-1
votes
1answer
24 views
what specification required for quardcopter to pickup 5kg weight
For a college student project, I am designing a quadcopter with a payload of 3-4kg.
As I am new I don't know what are the implications of such a requirement on the quadcopter design.
In particular ...
1
vote
1answer
128 views
DJI E310 Thrust Coefficient
I am reading Denis M. Filatov et al.'s paper "Parameters identification of thrust generation subsystem for small unmanned aerial vehicles" (https://www.semanticscholar.org/paper/Parameters-...
0
votes
2answers
122 views
How to implement a novel control algorithm for a drone
I and my research team are working on a novel drone design based on trirotor. The difference between this design and a trirotor is that it has an extra propeller to generate additional thrust, ...
1
vote
2answers
48 views
sampling algorithms in motion planning and local minima
I am trying to run RRT algorithm for motion planning for a quadrotor. The quadrotor ends up sometimes in corners without reaching the goal. I realized from sources online, that it is due to local ...
4
votes
1answer
130 views
Wait simulation time in a non realtime ROS simulation in Python
I want to control a quadrotor with a Python script and run the simulation as fast as my laptop can, not only in real time. I've modified my world and now the simulation runs with 7-10 real time factor....
0
votes
1answer
103 views
stable altitude quadcopter
I'm currently working on a project to generate a stable altitude and automatic control for a quadcopter
I'm using arduino as the flight controller
Ultrasonic sensor HC-SR04
MPU-6050
However my ...
1
vote
1answer
134 views
Quad-rotor 1-D Linear Control Simulation with MATLAB
I was Performing Programming Assignment with MATLAB for Quad Thrust and Height for an Introductory Course. The control input for a PD controller was According to the Equation
u = mass*(diff(s_des, 2)...
1
vote
1answer
247 views
What's the main difference between different motion capture systems (Vicon, Optitrack, etc)?
Last month I visited a quadrotor laboratory ($ 20m^2$ approx). They used both Optitrack and Vicon systems. However, they told me that Vicon cost 10 times as much as Optitrack. Considering that any ...
1
vote
1answer
860 views
MSP (Multiwii Serial Protocol) receiving data with pyMultiWii issue
I want to get telemetry data from my flight controller (Matek F405-CTR) and send control commands to it via MSP protocol.
I've already configured UART3 port on Matek in Inav configurator (look at pic)...
1
vote
2answers
57 views
Powering multicopter with multiple dedicated batteries
I am in the starting phase of building a fairly large octo-copter drone. I am currently thinking about the possibility of powering my octo-copter design using 4 separate batteries where each battery ...
0
votes
1answer
27 views
Excessive Heat Coming From Video Transmitter and Motor Electronic Boards
I'm building a quadcopter and I'm finding that certain electronic boards are heating up beyond what I believe the heat should be.
In this case I hooked up the video transmitter and then tested it. ...
0
votes
1answer
56 views
publishing on rostopics
I want to publish via terminal a particular message format - sensor_msgs/Joy. However, every format I use seems to be wrong and I cannot understand how it is meant to be written on the terminal. On ...
1
vote
1answer
77 views
Quadcopter ESC failure on first test flight
One of my four ESCs burnt out on a first test flight of a new quad build. I plugged the battery in, armed the drone, and one of the motors spun for less than a second before stopping. I immediately ...
1
vote
1answer
78 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 ...
0
votes
1answer
79 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 ...
0
votes
1answer
63 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 ...
0
votes
1answer
72 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 ...
0
votes
1answer
63 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 ...
0
votes
2answers
160 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 ...
-1
votes
1answer
21 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 ...
0
votes
2answers
51 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 ...
1
vote
0answers
50 views
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 ...
2
votes
0answers
114 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 ...
1
vote
0answers
144 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 ...
1
vote
0answers
32 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.
0
votes
2answers
237 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 ...
