Questions tagged [ros]

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

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4
votes
1answer
14k views

How to get a python node in ROS subscribe to multiple topics?

How a ROS node written in Python could subscribe to multiple topics and publish to multiple topics? All examples I found were for a single topic. Is this an event-driven model so subscription to ...
1
vote
1answer
375 views

ROS : Performing 2-D Pedestrian Dead Reckoning on an AR Drone and displaying location on a floorplan [closed]

I'm trying to find a way where I can estimate the location of my drone on a floorplan. Note that right now, I will just be moving the drone around manually and not flying it. I read up on PDR and ...
-1
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1answer
52 views

How can I save messages publishing from a ROS package into a variable?

I am using darknet_ros_3d package and writing a subscriber. So far, I have followed the code given as under: ...
17
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1answer
3k views

ROS: Best practices?

I'm going to build a small robot system, and it seems like that ROS serves a nice framework to control and program the system. However, I am wondering which is the best practice to manage the ...
29
votes
12answers
15k views

Can ROS run on a Raspberry Pi?

Can ROS run on a Raspberry Pi? ROS is resigned to run on a network of machines, with different machines, even different cores on the same machine doing different jobs. Can one of those machines be a ...
16
votes
2answers
7k views

How to choose a good IMU for a wheeled robot?

At our lab, we have a several "Kurt" type robots (about the size of a Pioneer, six wheels, differential drive). The built-in gyroscopes are by now really outdated; the main problem is that the ...
12
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2answers
11k views

ROS: catkin_make vs. catkin build

When using ROS: Why should I use catkin build from catkin_tools instead of catkin_make? I've been told that ...
6
votes
1answer
3k views

Implementing a boustrophedon algorithm in a given room with obstacles

I have a mobile robot which is navigating around a room, I already have the map of the room. I am using the navigation_stack of ROS. I am using rotary encoders for odometry. I am fusing the data from ...
1
vote
1answer
66 views

What is the Point of Monocular SLAM

I am not a V-SLAM expert yet, but as far as I understand with monocular V-SLAM there is a scale ambiguity introduced by the fact that a camera essentially is an azimuth sensor that maps the 3D world ...
4
votes
1answer
402 views

Robot moving sideways in RVIZ ROS

Hi, I have a wheeled-legged robot as you can see in the picture. When I simulate it in ROS-Gazebo it works fine, however at the same time in Rviz it moves sideways instead of forward or backwards. I ...
3
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1answer
1k views

Tf frame origin is offset from the actual base_link

I have built my differential drive mobile robot in solidworks and converted that to URDF file using soliworks2urdf converter. I successfully launched and robot and simulated with tele-operation node. ...
2
votes
1answer
858 views

Python PID tuning - Parrot Bebop 2 - Target follower - ROS

I'm developing a PID controller for making the drone follow a detected object. I used as reference these topics: Ttracking-objects-from-camera-pid-controlling-parrot-ar-drone Tracking-objects-...
1
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0answers
291 views

Gazebo crashes and burns launching empty world in new package [closed]

I'm launching empty_world copied into my package with the command roslaunch my_package empty_world.launch. Here is ...
0
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1answer
56 views

Coordinates seem to show overlapping but RViz doesn't

How can you place two objects that seem to overlap with their units but appear stacked on top of each other [original intent] in RViz? I was watching this video tutorial on ROS and URDF. I have ...
0
votes
1answer
410 views

Why can't the Controller Spawner find the expected controller_manager ROS interface?

I have a quadruped robot with base link (BL), 4 child links called LFT, LFT, RFT, RFT, T for thigh and each having 4 children with name LFC, LBC, RFC, RBC, C for Calf. 8 joints - Base link to 4 thighs ...
0
votes
1answer
37 views

Docker on WSL2: Dockerfile: how to test whether ROS gazebo can connect to already working X server (using its X11 display on Windows)?

I had the following errors and warnings in a ROS project. They showed up using docker-compose or when running a mere container from the image, which strangely had worked once somehow but then later ...
0
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0answers
380 views

Looking for a model in a gazebo

I have a small world file, say ...
0
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0answers
155 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: ...
0
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0answers
26 views

Docker on WSL2: ROS gazebo in “docker-compose”: demo “test talker” needed as the input of the standard RViz listener

Taking the image and the X server setting that you get from Docker on WSL2: how to test whether ROS gazebo can connect to already working X server (using its X11 window on Windows)?, I was curious how ...