Questions tagged [ros]
ROS (Robot Operating System) is a free, open-source robot software framework initially developed by Willow Garage. And now under the maintenance of Open Robotics.
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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 ...
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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 ...
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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 ...
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How to fix ValueError: module PIL Image is not a class?
This is the node I've written in rospy. It opens a socket connection and then converts the received image to < ndarray > and then < sensormsg.Image > and publishes it
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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:
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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 ...
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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 ...
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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 ...
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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 ...
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Does a stable library exist for docking robots using images?
I built a mobile base from scratch, and now I am focused on getting the robot to charge.
The robot is using an on-board webcam (and PC) to detect a QR barcode on the charger unit. Using OpenCV I find ...
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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 ...
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Calculate covariance matrix from x,y,z data
In ROS I've recorded a bag file from a custom robot (in real world) that does not provide covariance matrix and I want to use /odom to feed an EKF, but covariance ...
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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. ...
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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-...
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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 ...
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cartesian velocity control loop implementation
I'm using ROS (noetic) to intuitively control a franka manipulator using the panda_robot package for the simulation.
I've set up an extended kalman filter which fuses the following measures:
IMU data:...
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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 ...
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Problem with Define Robot Poses (in Moveit Setup Assistant)
In this picture, I can use GUI to define any pose of robot. However, I can't drag the slider or enter a number in the box. What is my problem?
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How do you publish on a ROS topic when the message type is not known?
I am trying to publish a ROS message in Python but I do not know the message type. I tried using AnyMsg and it did not work. If this is possible would someone be able to provide a Python code snippet?
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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 ...
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costmap_2d with nothing but a clearing footprint?
I'd like to set up a costmap_2d initialized to be 100% unknown or obstacles, and have it do nothing except clear grid locations within the footprint. I don't want to have a static map that is ...
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how do i create a /map frame?
I have the following tf tree, but I'm missing the /map frame. Where does it come from? What is supposed to publish it?
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Lookup would require extrapolation into the future on the same machine
I get this error when trying to view my RPLidar A2 scan in rviz2. It’s on a differential drive robot controlled using arduino using Articulated Robotics’ code that I quickly ported to Humble, ...
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ROS + kinect depth data duplication
I am trying to get depth data from a Kinect in a ROS project. It currently looks like this:
To arrive at this, I've done:
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Cannot define robot poses in MoveIt setup assistant
I am using ROS Noetic Ninjemys with Ubuntu 20.04. I made a URDF of an end effector. I tried to configure it with MoveIt setup assistant. However, I am unable to adjust the prismatic joint "...
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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 ...
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