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Questions tagged [uav]

Unmanned aerial vehicle. See also the tags ugv & auv.

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Examples of Multi-rotors (Quadrotors) in Ignition-Gazebo?

I am new to Ignition Gazebo. I want to have multiple(4) multi-rotors(quadrotors) following a trajectory. Is it possible to have any example repos to see this behaviour and understand the code ...
vbalaji21's user avatar
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20 views

How to takeoff multiple drone using mavros

I am using ros noetic with px4, mavros and gazebo 11. the following c++ script is working on single uav for takeoff ...
Mubashir's user avatar
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1 answer
71 views

Already higher than takeoff altitude(not descending)

I have the following Python code that arms and take off the UAV using pymavlink. I am using the px4 flight stake ...
Mubashir's user avatar
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1 answer
48 views

Crazyflie: Connecting, logging and parameters-->Add logging config

I would like to define stateEstimate.vx, stateEstimate.vy, and stateEstimate.vz variables to ...
nejattukenmez's user avatar
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1 answer
107 views

/cmdVel topic: cmdVel(roll, pitch, yawrate, thrust) for crazyflie

We are working on Crazyflie 2.1 to implement our controller by utilizing ROS2. We used the following repository on GitHub to make it possible. crazyflie experimental We'd like to access ...
nejattukenmez's user avatar
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0 answers
82 views

UAV simulation of obstacle avoidance in Gazebo?

I would like to simulate some 3D path planning capabilities of an UAV in Gazebo. So Firstly, I download a point cloud of an outdoor area with obstacles. I can find any in internet.Than Load the point ...
Bob9710's user avatar
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1 answer
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3D path planning for coverage of a given surface

I have a 3D model of a complex object. I have been able to generate all possible points that are around 1 m away from the surface of any part of the object, so the collision is not possible: Now my ...
Ekci's user avatar
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1 answer
98 views

How to find the camera matrix and distortion matrix from the given data

...
Amit's user avatar
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1 answer
266 views

Why are Euler angles used for drones

I know this question is asked before, but the reason why was still not clear to me. If you've a 6-DOF IMU, the gyroscope measures is degrees/s or radian/s. Why do we want to convert the body rates to ...
Xander van den berg's user avatar
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1 answer
2k views

Air Resistance Drag Force Calculation For Quadcopter

Hello there. Hope you are all doing well. I have created a dynamic quadcopter model on Simulink and designed a controller for it. So far, everything is going well. However, since I am going to be ...
kucar's user avatar
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1 answer
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Mapping Joystick Inputs to Quadcopter

hope you are all doing well. We are doing a project where a quadcopter is controlled by an ordinary joystick. We have constructed the Control Algorithm and the joystick to move the quadcopter in ...
kucar's user avatar
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What autopilot options are available for nano helicopters?

I am new to the world of drones and UAVs. While there are a ton of resources available online for quad-copters and multi-copters in general, I am really struggling with finding resources on ...
jar's user avatar
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1 answer
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Communication method between drone swarm members

I am a doing my FYP in drone swarm anti collision algorithm. The project aims to develop an algorithm to fly a minimum of 3 drones and here are the requirements: 1-the drones can identify the ...
Sahel Wahdain's user avatar
4 votes
1 answer
74 views

Universities offering courses about Drones (Unmanned Aerial Vehicles [UAVs]) [closed]

I am trying to gather some information about university courses offered about drones (or Unmanned Aerial Vehicles). At the beginning, I thought that I would have found way more than what I found and ...
desmond13's user avatar
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34 views

Survey path planning for UAV with high turning radius

I want to perform rectangular area survey. The sensor can either work with very narrow FOV or with wide FOV but requiring very high overlap. My plane's turn diameter is much greater than required ...
Lupus the Canine's user avatar
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1 answer
59 views

ROS sensor implementation

From this page, there are lots of sensors to be used in ros robots. http://wiki.ros.org/Sensors But, I could not install any of them to the robots in my simulations. For example, I want to install the ...
Jean's user avatar
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1 vote
1 answer
274 views

Tuning a cascaded attitude and attitude rate PID controller

Assume that I have an object in 3D, and I want to have a controller that stabilizes its orientation (also referred to as "attitude"). To be sure we are clear: attitude is measured in "degrees" or "...
desmond13's user avatar
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69 views

Proper Joystick Inputs for UAV Quadrotor Control

I am working on the adaptive control of quadrotor UAV in MATLAB/Simulink environment. I prepared some trajectories for the UAV to follow in $x$, $y$ and $z$ directions. I would like to implement these ...
studios.93's user avatar
1 vote
0 answers
58 views

Intel Realsense Cameras for Object Avoidance and SLAM to go to destination

My goal is to make a UAV which can search an area while avoiding obstacles. I figured I would navigate using the SLAM and Intel Realsense D435i (a stereoscopic camera with an IMU built in), but all of ...
figbar's user avatar
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1 answer
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Drone or UAV Platform for deployment of Deep Learning / Reinforcement Learning

Good day, It has been a while since I last posted. I would just like to ask if anyone part of a lab or company doing research on aerial robotics has any suggestions of a good platform for deploying ...
user123456098's user avatar
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1 answer
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How to combine HectorSLAM and RGB-D camera data to achieve 3D mapping?

I represent a team of engineers from Lancaster University. We are attempting to combine 2D LIDAR data (preferably using HectorSLAM) and RGB-D camera data (as done by Technische Universität Darmstadt ...
user avatar
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113 views

Why do we connect pins 2 and 3 on APM to enable PPM

Why is it necessary to connect signal pins 2 and 3 via jumper on an APM2.8 board to enable PPM. I am using flysky fs-ia6b receiver with the APM mentioned above. Pins 2 and 3 control pitch and ...
A. Sinha's user avatar
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4 votes
1 answer
126 views

Battery weight in quadcopter

We all know that the fly time of a quadcopter is proportional to its weight (and the propellers size, etc), and a high capacity battery is heavy, but also a high capacity battery would make the fly ...
Unnamed's user avatar
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2 votes
0 answers
43 views

Checking for external compass in mission planner

How can I check whether the external compass is really selected for my APM 2.8 using mission planner. The primary purpose of using the external compass is to have less electro magnetic interference ...
A. Sinha's user avatar
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1 answer
186 views

Will a 2.4ghz controller work with a 5.8ghz video transmitter?

I’m building an fpv racing drone and I accidentally ordered a 2.4ghz controller and a 5.8ghz video transmitter. Will they work together? I have 5.8ghz fpv goggles so I assume they will work.
Tim Li's user avatar
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0 answers
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Best practices for quad-copter designing

What are the some of the best practices for placing the components (including battery, GPS, flight-controller, wires, receiver etc.) on the air-frame of an 'X' quad-copter to ensure the minimum power ...
A. Sinha's user avatar
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0 votes
1 answer
372 views

Why 3DR Power Module has two 5v and GND output

Why are there two 5V and GND output in 3DR Power module (https://www.instructables.com/id/Safetly-use-CLONE-APM-Power-Modules/) (https://www.youtube.com/watch?v=M6OSp05Y5b8). Can we power up an APM 2....
A. Sinha's user avatar
  • 164
0 votes
1 answer
40 views

Autonomous quadcopter: How to transform setpoint into motor inputs?

I would like to know how to transform a setpoint to inputs for the motors of a quadcopter. I would like a function like that: ...
mattplm's user avatar
0 votes
2 answers
586 views

Are all drone propellers compatible with all brushless motors?

I want to build a drone using these motors SunnySky X2212 KV1400 Brushless Motor For RC Drone FPV Racing Multi Rotor and these propellers DYNAM 2X RC Model Airplanes 9x5 Inch Nylon Propellers ...
Vincent Quirion's user avatar
2 votes
0 answers
59 views

How to identificate uav's roll and pitch model and control to track object?

I'm building a drone distance controller for parrot mambo. I need to track a colored page with given distance and given heigth. I can get the yaw information from parrot mambo with 0.5 sec. Since I ...
İhsan Cemil Çiçek's user avatar
2 votes
1 answer
2k views

How is the IMU used in the PixHawk?

Looking at 3DR's Pixhawk hardware on GitHub the FMU and IMU are treated as different pieces of hardware. On the schematics for the FMUs (example) there is limited reference to the IMU. So, is the IMU ...
Catherine G's user avatar
8 votes
2 answers
16k views

what is the algorithm to get position (Linear displacement and linear velocity ) using IMU (Like MPU6050)?

So I have been working on a drone project for a very long time, now I decided to work on Kalman filter which is used widely nowadays like Ardupilot. I looked at the source code so basically understand ...
Robokishan's user avatar
0 votes
2 answers
222 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, ...
Hoàng Đình Thịnh's user avatar
0 votes
3 answers
2k views

How many independent control inputs does a hexarotor have?

6, because a rigid body has six degrees of freedom 4, since it is similar to a quadrotor, except with more motors 6, because there are six motors I was taking an online quiz, and I thought option 3 ...
Vhulenda's user avatar
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1 answer
1 view

Can 3D Lidar localize when placed vertically?

Currently the Velodyne puck being used on our UAV can localize in an obstacle course room when it is mounted with the base parallel to the ground. But there are more obstacles above and below the ...
user avatar
2 votes
0 answers
128 views

Position-Attitude Kalman filter with Quaternions

I want to design an EKF to estimate the position of a UAV. If I were doing this with Euler angles then I would have a state vector that would look like \begin{bmatrix}north&east&down&...
MrHat's user avatar
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0 votes
1 answer
6 views

Costmap shows free space as obstacles

Hi everyone! I am trying to use navigation stack on quadcopter equipped with kinect sensor at Gazebo simulation. I am using grid_map topic of rtabmap_ros package as map for navigation of UAV which ...
user avatar
1 vote
1 answer
125 views

how to write a uav teleop code?

I'm currently working on a teleoperation code for crazyflie. I'm not using a joystick, but I'm using leapmotion and I'm trying to understand how they code for a joystick in order to implement the same ...
Катя's user avatar
0 votes
1 answer
3 views

Get rotate angle to move a robot in 3D environment

I have an UAV and my idea is to make it moves around some points I pass to it. My logic is the following: 1- Moves UAV in z-axis to adjust high; 2- Rotates around z-axis; 3- Moves forward on x-axis ...
user avatar
2 votes
1 answer
859 views

Generate a coverage path given a polygon region

I'm making an app which controls a drone (DJI) and takes photos. In one particular feature, the user can draw a polygon (let's keep it a convex quadrilateral for now) and the app should generate a ...
Ramsundar Shandilya's user avatar
0 votes
1 answer
336 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 ...
desmond13's user avatar
  • 211
1 vote
1 answer
321 views

Is MoveIt! suitable for fixed-wing aircraft path planning and obstacle avoidance?

I have seen that it is possible to use MoveIt! for path planning and obstacle avoidance for quadcopters/quadrotors. For example: https://www.youtube.com/watch?v=NRzeQD_Etog https://www.youtube.com/...
Flux's user avatar
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2 votes
2 answers
2k views

How to convert raw Pitot tube readings to air speed in m/s?

I'm building a kite flying robot, for which I want to measure air speed. So I combined a Pitot tube with an ADC and connected it to my Raspberry Pi using this tutorial. It seems to work perfect, in ...
kramer65's user avatar
  • 349
3 votes
3 answers
876 views

How to measure pull force on a (kite) rope?

I'm building a kite flying robot, in which I've already got some sensors built in. I now also want to measure the pulling force on the rope which is attached to the kite. So I thought of attaching a ...
kramer65's user avatar
  • 349
0 votes
1 answer
5 views

Need for a customizable Unmanned Ground Vehicle (UGV) to work in ROS and Gazebo

Hello everyone, Please help... I am working on a project where I need UGV designed in ROS and can be simulated in Gazebo and (Preferably contain some sensors such as camera, ultrasonic and Lidar or ...
user avatar
1 vote
2 answers
1k 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 ...
Chad Johnson's user avatar
1 vote
1 answer
88 views

How does Amazon ensure its drones are not shot down or captured when in service [closed]

If Amazon plans to deliver packages using drones, how does it ensure the drones reach their destination safely and come back? Won't thieves be able to easily steal packages and drones by shooting them ...
nk379's user avatar
  • 111
0 votes
1 answer
5 views

Graphically monitor CPU - RAM etc over ROS

Hi, I am using an ODROID-XU4 on a quadrotor. On the ODROID is running ROS. To the Odroid is also connected to a camera flea3 by PointGrey. I am launching the pointgrey node to connect to the camera ...
user avatar
0 votes
1 answer
240 views

Utilizing the inertial sensors in an AR Drone

I'm trying to figure out how to use the inertial sensors in an AR Drone to perform a rough version of dead reckoning. I want to move the drone around a room (without flying it) and using the velocity ...
Fadhil Abubaker's user avatar
0 votes
2 answers
2 views

recall multiple ROS nodes in one main cpp ROS node

Hello, I'm using ROS indigo to fly my Erle Copter, I want to ask you about ROS nodes, I have several ROS nodes: one of these nodes will take reading from one of the sensor and do some calculations, ...
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