Questions tagged [drone]

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Subscribing custom topic in ros-mobile

I am using px4-sitl and mavros for UAV simulation in ros noetic and try to teleopt the drone using ros-mobile. what I noted mavros has its own message type defined like ...
Mubahsir's user avatar
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Wind effect on a drone: formulation

When the drone flies in the open space the wind acting on it creates aerodynamic drag force and the aerodynamic torque. So when I want to simulate the drone flight using the state space equation do we ...
Alisa976's user avatar
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F450 Quadcopter frame torques

I'm building a quadcopter and programming it's flight controller which is running on a RP2040. These are its main characteristics: Frame: DJI F450 Radio: FlySky FS-I6 IMU: Adafruit BNO055 Breakout ...
Alex Foglia's user avatar
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URGENT:Unable to takeoff drone automatically in real life(Navio2 with Ardupilot via MavROS)

I am currently working on a project that utilizes hand gestures to control the drone without GPS. I was able to arm the drone but cannot seem to make the drone take off after arming in real life. This ...
Alex's user avatar
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1 answer
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In a Blank Webots World, How to Operate the Mavic

I need to operate the mavic drone in a world other than its demonstration but when I do so the robot will just crash to the ground. I thought it was the world parameters or the controller that was ...
Léo's user avatar
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1 answer
171 views

SOLVED: How to visualize in rviz2 fixed frame a Pointcloud2 collected w.r.t. a mobile frame

I'm using ROS2 Humble on Ubuntu 22.04. In my project I'm trying to visualize in rviz2 a pointcloud generated by a depth camera, mounted on a drone simulated in gazebo garden. Thanks to this topic I've ...
AleCavalliPolito's user avatar
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6 views

Using Image Stitching for X,Y Pose Estimation in Quadrotor Navigation: Feasibility and Limitations

I'm exploring the feasibility of inferring the x, y pose of robots without direct positional data but utilizing image stitching. Here's the scenario: I have multiple drones equipped with downward-...
hunterlineage's user avatar
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Parrot ANAFI drone parameters

I have a project include the use of Parrot ANAFI drone, however I don't have the values of the inertial parameters such as the mass moment of inertia (I_x,I_y,I_z) only the mass is known. Can you ...
Baker Shehadeh's user avatar
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1 answer
28 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
68 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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1 answer
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Mambo parrot /tello control propeller speeds

From my understanding, for parrot mambo and tello drones, we control forward-backward, up-dow, left-right, and yaw speeds (in m/s and deg/s). But the low level control is control the 4 propeller ...
Jose Daniel's user avatar
1 vote
1 answer
47 views

Guide Drone using GPS

I am new to drone building and developing. I am using Cube Orange plus and gps module from company Taoglas. My GPS is fixed few cm above esc. The drone is drifting too much when I am keeping it at a ...
Ankit Kumar's user avatar
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1 answer
145 views

"world" frame does not exist in tf tree when launching gazebo simulation

I'm trying to work with sjtu drone simulator (https://github.com/NovoG93/sjtu_drone). I'm using ROS2 humble, Gazebo 11. When I launch the program, using: ros2 launch sjtu_drone_bringup ...
oferb's user avatar
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223 views

Estimating gyroscope bias for attitude IMU sensor fusion with an unscented Kalman filter

I'm trying to use a UKF as the attitude estimator for a drone with just a gyroscope and accelerometer as sensors. So far, it's going well and after some tuning appears to perform basically as well as ...
brennanenanen's user avatar
1 vote
2 answers
154 views

How to recover low voltage LiPo battery?

I am using a 3-cell LiPo battery for a quadcopter. My charger is the Prophet Sport Mini Multichemistry charger. It has built-in undervoltage protection, meaning it will not charge a LiPo or LiFe ...
YaBoiWhiteRice's user avatar
1 vote
2 answers
155 views

Using Here3+ for GNSS information, missing documentation?

The Here3+ is a GNSS receiver often used by drones, specifically the pixhawk. I wanted to use this receiver in my own project for geopositioning, I am however completely unable to find any ...
kees jansen's user avatar
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Why new/recommended MEMS IMU for AHRS for drones are 6-DOF instead of 9-DOF?

I'm developing an quadcopter as an DIY project. I'm in nascent stage of development. I've just finalized the design/working philosophy. I'm planning to fuse data from 9-DOF (9-Axes) IMU + GNSS + ...
Dark Sorrow's user avatar
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32 views

Need to automate some simple actions of a drone

I am working on a student&enthusiast project that includes the participation of a few drones (copter-type). Right now, there is nothing complicated in their movements, just, for example 100 meters ...
Gela O.'s user avatar
0 votes
3 answers
988 views

Designing S-Curve velocity profile for given Distance

I'm trying to create a high-level API for controlling a drone, where I tell it how far I want it to go (eg. moveForward(10)). The SDK allows me to give the drone an ...
dkapur17'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
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Do electromagnets affect magnetometer calibration?

I am designing a landing pad for a drone that will have electromagnets built into the pad. My drone has a pixhawk 2 with PX4. I'm worried that the electromagnets in the pad will throw off the drone's ...
Sam Chamberlin's user avatar
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0 answers
52 views

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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Vulnerability of LiDAR systems for autonomous drones

I will soon be working on an autonomous drone project and we're planning to use LIDAR systems for localization & mapping. However, at the same time, we are looking into how to make drones safer ...
Azrion's user avatar
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1 vote
1 answer
95 views

What devices can I use as a flight controller in a Quadcopter project? [closed]

I know that the flight controller is the heart of the quadcopter and a device which has to be considered greatly when building a quadcopter project. In regards to this quadcopter project that I'm ...
Mubashir Hussain's user avatar
1 vote
1 answer
72 views

Drone lost traj recovery

So I am using slam algorithm to localize the drone which is gps denied . The input to the slam algo is imu data and a video . Now after the first run of the slam algorithm it creates the trajectory ...
Karan Katiyar's user avatar
2 votes
1 answer
269 views

What can cause yaw rotation on a multirotor when yaw control is disabled?

Let's assume that I assembled a multicopter (quadcopter, hexacopter or octocopter) and let's say that I disable yaw control on it while roll and pitch controllers are enabled. Now let's assume that I ...
desmond13's user avatar
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1 vote
2 answers
1k views

To calculate roll,pitch and yaw

How do I calculate roll,pitch and yaw value from the position co ordinates of the drone, that is x,y and z from the gps sensor??? Using the x,y and z co ordinates I have to calculate roll,pitch and ...
Anonymous's user avatar
0 votes
1 answer
189 views

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
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1 answer
206 views

Imaginary part in result of inverse laplace transform

I am working with a system(closed-loop feedback control) that has a transfer function like this F = 20*(s+5)/(s^4+13.5s^3+41s^2+80*s+100) this one is in the s-domain but for the response analysis, I ...
ShivamPR21's user avatar
4 votes
1 answer
70 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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2 answers
125 views

Finding the right PD values for a quadcopter simulator

I am working on this short assignment where I have to find the right PD values for a simulated quadcopter. I have to reach 0.9 meters under 1 second with an overshoot of less than 5%. This is my ...
Onur-Andros Ozbek's user avatar
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1 answer
169 views

How to calculate the pitch of the quadcopter rotor blade and their efficiency?

I have gone to some of the blade designs and profiles of the blade which suits my requirement. But, once after entering the Theoretical calculation, I was stuck in the determination or the ...
Praveen kumar selvaraj's user avatar
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1 answer
41 views

Setting up rewards to account for UAV crashes (Reinforcement Learning)

I am working on a project to implement a collision avoidance algorithm on a real UAV. I'm interested in understanding the process to set up a negative reward to account for scenarios wherein there is ...
desert_ranger's user avatar
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1 answer
3 views

[ERROR] [1588286007.343230]: Current /drone/down_camera/image_raw not ready yet, retrying for getting down_camera_rgb_image_raw

I am using a script (appended to the end of this post) to setup my workspace on my Ubuntu18.04. After setting everything up I ran the following lines: Terminal 1: ...
user avatar
0 votes
1 answer
213 views

EKF-SLAM what should the observation model be?

I am implementing an EKF algorithm for a drone localization, and while I was defining the observation model I got a bit confused. This is my situation: I have a drone which is able to give me the ...
adiego73's user avatar
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1 answer
73 views

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
0 votes
1 answer
7 views

Drone for mavros

Hi ! So I want to build a small drone(can be tested in lab) and deploy ROS on it. Can anyone help me with what motors and flight controller that I should use to do so ? I want to use mavros_pkg so ...
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0 votes
1 answer
2 views

Ardupilot + ROS

Hi ! I have made a hexacopter with APM 2.8 and would love to deploy ROS on it using a Raspi. I aim to use opencv with ros to detect landing marker and make it land autonomously. But I don't know what ...
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1 answer
11 views

Autopilots which are compatible with ROS

Where can i find their list please help Originally posted by gadamer on ROS Answers with karma: 11 on 2018-03-18 Post score: -1
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0 votes
1 answer
27 views

Drones compatible with ROS

Hello everyone, I'm currently looking a drone compatible with ROS and i need some buying advice. Currently i was working with a parrot bebop, coupled with a S.L.AM.Dunk also from Parrot. but it's not ...
user avatar
0 votes
1 answer
2 views

Drone Simulation using GMapping and Realsense R200

Hi, I'd like to simulate the RTF Drone from Intel which has the R200 Camera as the main sensor. I'd like to use it for mapping simulations with GMapping. I want to build a launch file to load world, ...
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0 votes
1 answer
4 views

Indoor Mapping and Localization for Drones

Hi, I am assembling a drone using the Intel® Aero Compute Board, Intel® Aero Vision Accessory Kit (Intel® RealSense™ R200 stereo camera) and other sensors. I don't know where to start and which ...
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0 votes
1 answer
5 views

Drone doesn't stop taking off

Hi, my problem is that after I send a takeoff message to my drone (in gazebo) it doesn't stop taking off. It keeps moving upwards until I publish to land topic. I would like it to hover in place or at ...
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0 votes
1 answer
4 views

How to extract image of bebop camera to my computer

I'm trying to processing images obtained of bebop 1 camera from my computer, but I can not access the images. Can you help me ? I'm using the autonomy_bebop driver but the documentation does not show ...
user avatar
0 votes
1 answer
11 views

Getting started in the world of drone programming

Hey guys, I'am new in this site but i think i will pretty active in the next few months! My idea is program a drone so that it follows objects alone. I have some programming experience but i don't ...
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1 answer
1 view

catkin_make is not building my bitbucket based ros packages

Background I have an existing project that I want to migrate to a different computer. I started building a project on my Raspberry Pi and then put the project up on github. The current name of the ...
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1 answer
1 view

How to control ardrone in tum_simulator with command line?

I've installed tum_simulator for ros indigo and am having some troubles controlling the drone. Ultimately I want to control the drone from a python program, so for now I would like to control it via ...
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0 votes
1 answer
3 views

ROS Programmable Drones/UAVs in the Market

Hello, Does anyone have any recommendation for programmable drones (preferably ROS compatible) available in the market? For research purposes (mainly navigation problems) in a robotics lab? Thanks, ...
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0 votes
1 answer
51 views

How to install joy package

I am new to ROS, forgive me if the question relates to fundamental knowledge I am not aware. What I am trying to do is using joy stick to control A.R. drone 2.0 by ROS in Ubuntu 14.04 LTS. I am ...
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0 votes
1 answer
4 views

Develop a flight control system

Hi all! Im actually building a quadcopter (accelerometer+gyroscopemotor+props+esc...) I would like to develop my own flight controller. Just discovered ROS. Could be ROS interesting to develop and ...
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