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Questions tagged [ros]

ROS (Robot Operating System) is a free, open-source robot software framework developed by Willow Garage.

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2answers
286 views

RViz: How to Visualize a Voxblox Mesh as a MarkerArray?

I am currently trying to run the test cow and lady dataset with Voxblox. The process appears to execute properly in the terminal, but I cannot view the mesh in RViz. When I try to add the topic <...
2
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1answer
72 views

Turtlebot 2 dimensions

I am trying to drive the differential drive kinematics of Turtlebot 2. However, I couldn't find the distance between 2 wheels on the datasheet. I'd appreciate if anyone could provide me this dimension....
1
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1answer
38 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 ...
1
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1answer
56 views

SE3 composition operator gives unexpected results

Given Data and Algorithm I have a stream of SE3 poses supplied by a basic wheel encoder odometry through ROS message passing system. Odometry publishes data in traditional to ROS ENU coordinate frame ...
0
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1answer
41 views

Main not defined package python issue

My apologies but I've run out of ideas. I'm very new to python and stuck trying to execute the following code from this tutorial: ...
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0answers
101 views

MATLAB ROS Communication Issue: The following nodes should be connected but aren't

I have both MATLAB and ROS installed on a SINGLE Linux machine. I am trying to publish data from MATLAB over a rostopic and echoing it in the terminal to view it. No matter, however, I play with URIs ...
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0answers
11 views

list of robotics framework running over xenomai

Can anyone tell me the list of robotics framework or softwares which can run on xenomai patched kernal like orocos? I was learning orocos this days in normal gnulinux kernal, but after i patch xenomai ...
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0answers
80 views

warning: target request linking to directory

Im trying to build rtt package of orocos-toolvhain by using cmake .. command inside build folder. when i do so i'm getting below warning. ...
0
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0answers
55 views

install orocos-toolchain in xenomai pathced linux?

Can anyone tell me the proper way or give me link to install orocos-toolchain on xenomai patche linux? I have patched xenmai with linux kernel in my system and anslo when i enter "xeno lateny" i an ...
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0answers
76 views

Which Kinect to use for robotic arm pick and place application with object detection?

I am building a robotic arm for pick and place application. The robot is going to recognize several objects using the RGB feed from Kinect (will use a model such as YOLOv2 for object detection, ...
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0answers
96 views

Required library XENOMAI NOT FOUND

I am following this tutorial to install orocos in my system with ubuntu 16.06, xenomai 3.0.5. But i'm getting error: ...
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0answers
91 views

Kalman filter for slow ground vehicle with RTK

I have been using dual RTK receivers for my tractor projects. This gives me reliable position, heading, and tilt at low rates (10 Hz). I recently began working with an INS (an Advanced Navigation ...
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0answers
69 views

undefined reference to KDL::Rotation::Quaternion

I am using orocos toolchain 2.9, ros kinetic, ubunt u16. ...
1
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1answer
196 views

Adding ROS to Raspberry Pi car and teleoperation

I just completed a Raspberry Pi car setup shown in the image below. With my car now assembled, I can run a simple Python script put the necessary GPIO pins HIGH or LOW and moves the car around ...
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0answers
65 views

PixHawk I/II not working in 'Rover' mode (firmware issue?)… HELP!

We are working in a new agricultural rover, and we opted for PixHaw-II+ROS+MavLink platform as a good control alternative. However, our project is stuck as the PixHawk seems to work only when it is ...
0
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0answers
29 views

controller-youbot: call ros::init() error

I am trying to run run the controller-youbot package from this link. i have build this package succesfully. Now when i try to run the deployer as u can see below it shows some error. i don't know from ...
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0answers
766 views

Unable to install ROS kinetic on Ubuntu 16.04

I am following instruction here. When I try to do the full install sudo apt-get install ros-kinetic-desktop-full I am getting this error:- ...
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0answers
16 views

Gazebo Force Model Incorrect

If I use the Gazebo7 UI to apply 100N of force along the X axis to a 1Kg sphere it should go flying, right? Creating a 1Kg primitive sphere and applying 100N through the UI makes it move 1m over 18 ...
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0answers
58 views

rtt-exercise building error-orocos-toolchain

I am using ros kinetic in ubuntu 16.04. My first error is: ...
2
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0answers
486 views

ROS Gazebo Odometry Issue

I am setting up a Gazebo model for use with the navigation stack. I have been reading the Navigation Tuning Guide and am confused about the lidar data in the odom frame. I would think that the tuning ...
0
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0answers
39 views

Error mgs during multi vehicle simulation with launch file

I followed the instruction as mentioned here. when I run the last command to launch environment works fine for default programme but when I added code for one more drone (UAV1 iris_3) and run ...
0
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0answers
75 views

Finding transformation matrix between two coordinate systems

This probably might be a trivial question but I'm kinda new to the scene. I've got an object in a simulation that is at its origin Ps[Xs,Ys](to keep things simple for me, I am considering a 2D space ...
1
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3answers
910 views

Is a virtual machine with ros-kinetic available anywhere?

I want to learn ros-kinetic from a virtual machine. I found that ros-indigo is available from nootrix; similarly, is there a ...
0
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2answers
337 views

install ROS on ubuntu 17

which distribution of ROS should I install on Ubuntu 17 I have searched in ros distributions wiki but couldn't find any specification and I also found that ROS Kinetic Kame is not suitable for ubuntu ...
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0answers
29 views

Need help with drivetrain system for a 4-wheeled mobile robot Arduino and Ros

Looking at all these great, specific question in robotics stack exchange, I'm afraid I am a complete beginner at creating a robot and with ROS and arduino. My aim in the long term is to learn how to ...
0
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1answer
116 views

Error during mavros Multi-Vehicle Simulation with px4 in Gazebo | Invalid <param> tag

I followed the instruction as mentioned here. Everything worked fine but at last stage when I try to run:- roslaunch px4 multi_uav_mavros_sitl.launch I get ...
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2answers
78 views

Publisher and subscriber

Can anyone please explain what is a publisher and a subscriber when we talk about ROS? Where is which of them installed and what do they do? Any simple example is appreciated.
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1answer
2k views

Invoking “cmake” failed

I am unable to solve this problem. I tried to run catkin_make command in catkin_ws directory ...
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2answers
349 views

Mujoco and MoveIt!

I want to implement deep reinforcement learning using a UR5 robot. A little research told me nowadays researchers are using openAI gym, Mujoco, rllab as their frameworks. The thing is, I want to train ...
1
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1answer
2k views

Installing ROS in a conda environment

I'm planning to setup ROS and it's dependencies in a conda environment (similar to virtualenv). I've read a few posts where they state it's not going to be simple. Did any of you guys do it ? If you ...
3
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1answer
205 views

ROS PCL: Help with Moving Least Squares filter

I'm trying to implement a simple ROS node to perform Moving Least Squares filtering on a sensor_msgs/PointCloud2 topic. I'm following this PCL tutorial, which uses ...
0
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1answer
324 views

Real time implementation of EtherCAT master with ros_control

I want to control a motor using EtherCAT protocol. 1. I used IgH ethercat master to control motor in hard real time (1 kHz). 2. Later I want to integrate this in ros_control with hard real-time ...
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0answers
287 views

rostopic pub/echo not working on single pc system

I'm working my way through the tutorials in the wiki one by one and I and into some issues in the 'Examining the Simple Publisher and Subscriber' tutorial (found here). All my code is identical to ...
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0answers
256 views

Kangaroo x2 and Sabertooth 2x32?

I have successfully used sabertooth 2x32 vai USB cable . The code is listed below ,sabertooth dip switch configuration is (On off on on on on 1-6). USB cable connected directly (No ttl cable or ...
0
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1answer
381 views

This script require root privileges! | what is going on ?

I run the following command to install GeographicLib datasets for mavros inside the catkin_ws directory (catkin workspace). ...
0
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2answers
578 views

roslaunch mavros px4.launch not working properly

when I run roslaunch mavros px4.launch command process start and shut down. ...
2
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1answer
416 views

Error during turtlebot launch in ROS

When I run roslaunch turtlebot_gazebo turtlebot_world.launch I am getting this error:- ...
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1answer
39 views

how do i select light-weight 6dof robot?

I plan to do some scientific research, after modeling and path planning for the robot, The algorithm outputs the Joint control torque(or Joint variable), and then i want to input this result to the ...
1
vote
1answer
127 views

rospack Error: package 'script' not found

I am trying to run rosrun script forward.py but it gives me an error saying [rospack] Error: package 'script' not found In my ...
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2answers
205 views

Using ROS to control a CMM (Coordinate Measuring machine)

i'm a senior, i really desperate to find answers here. i am building a robotic arm with bunch of low-cost sensors , motors and other actuators. i'm using PI 3 as my Microcontroller. I need helping to ...
0
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3answers
2k views

catkin_make unable to build and throws “Makefile:138: recipe for target 'all' failed make: *** [all] Error 2 Invoking ”make -j4 -l4“ failed”

I have been trying to build my ROS workspace using catkin_make, where i have cloned a repo/PACKAGE. I tried many of the things mentioned in previous answers to questions similar to my issue but ...
5
votes
1answer
403 views

Is there any ROS community effort bases on golang?

I recently read a Go language(Golang) book and feel that this language is what I like. I like C and Python, C can do the low level and basic jobs well. This language is also designed lovely. Also ...
0
votes
1answer
79 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: ...
1
vote
1answer
97 views

how to sync the timer in control system with ROS?

To simulate a system, a global timer will be set and all submodules will be synchronized with that timer to work together. such as PID controller, kalman filter, PWM module etc. How do you sync the ...
0
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2answers
332 views

Error starting image_view video_recorder using launch file

To record .avi video, I am using video_recorder for the image_view package. I want to do this through the launch file. Here is the how I put it in there ...
2
votes
2answers
454 views

Nuc, custom pc or raspberry pi?

For our Minor “Robotics and Vision” we need to use ROS to create a system that can navigate to and from a coffee machine. The available hardware consists of a robotic platform from "Dr Robot", and a ...
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0answers
313 views

Interfacing multiple ethernet sensors on ROS system (single ethernet port) [closed]

My system consists of the following: A PC with a single ethernet port and other USB ports, a robot mobile base, a SICK LMS lidar with ethernet cable, a Velodyne sensor with Ethernet cable. The robot ...
2
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3answers
296 views

Introduction to AI Robotics book: robot implementation, with ROS?

I'm reading the book Introduction to AI Robotics By Robin R. Murphy and it the first character said, more or less, that after chapter 5 I will be able to design and implement my own robots, either in ...
4
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1answer
601 views

Why do we need ROS?

I'm a beginner in robotics and I'm planning to do a basic navigation problem for differential drive robot. I know the concept involved and can code it in the arduino but I came to know about ROS and ...
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0answers
134 views

Getting started with motion planning

I have recently finished the coursera Motion Planning course and I am looking for a project to do, using ROS, OpenRave, Gazebo and similar tools. My project would be in the area of motion planning for ...