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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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Initialization failed: Error initializing stage: generate grasp pose: invalid pregrasp: unknown state ''

Hi I am currently working with Moveit Task Constructor package at ROS Noetic dist. I want to folow this tutorial but instead of using the panda robot, I would like to use my robot. To do that I first ...
Doğukan YILMAZ's user avatar
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publishing on set_link_state gazebo

I'm trying to publish some angular velocity to one of my drone rotor However the moment I publish, my rotor teleports to origin, and this is not only for this model, doesn't matter what model or what ...
Ayush Jha's user avatar
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How to simulate motion of leggeed robot

I am trying to simulate a legged robot but i am having issues with the motion. The robot is unable to drag the the base and the legs slip. https://youtu.be/gsimOuvqvq8
Dev Manek's user avatar
1 vote
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Changing username on ROS discourse https://discourse.ros.org/

Is it possible to update the username on https://discourse.ros.org/ Not sure if this is the right place to ask the question, but I haven't found any option on https://discourse.ros.org/ Thanks.
Yeshasvi's user avatar
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Mobile manipulator with MoveIt

I am working on a mobile-manipulator having a robotic arm and a mobile base. The mobile base is a 4 wheel holonomic drive(mecanum wheels) robot. I am trying to use MoveIt for controlling the arm and ...
Pratham's user avatar
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Add constraint to maximise momentum in moveit

Is it possible to add constraint to trajectory planners in MoveIt to plan a trajectory such that it maximize momentum? For example lets say I want a robotic arm to hit an object. In this case I would ...
Pratham's user avatar
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2 answers
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How do I handle map/odom transforms if I want to use robot_localization as well as slam_toolbox?

I'm trying to use slam_toolbox (2d LIDAR) in conjunction with robot_localization (IMU + Wheel Odom). So far my best idea for managing the frames is as shown in the pictures below. However, this ...
PrattPrakash's user avatar
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ROS: Further understanding the diffrence of MultiThreadedSpinner and AsyncSpinner

I have several years of experience with robot software development using ROS, especially ROS Noetic. I want to clarify my understanding about ...
Danendra's user avatar
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moveit_servo errors "[servo_server-1] process has died [pid 177444, exit code -11, cmd "

I want to run the pose tracking example of moveit_servo, but it shows an error message. ...
xu zhang's user avatar
1 vote
1 answer
24 views

ROS1 gazebo11 invisible links

I'm trying to spawn my robot urdf in gazebo, but some links are not showing, although they appear in the left menu bar. They also show in Rviz and Moveit, so it has to be something with gazebo visuals ...
ChikN42 -'s user avatar
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Not getting intensity data from pointcloud when using gpu lidar in gazebo

I was trying to work on lidar point cloud using PCL by simulating a lidar in gazebo fortress and ROS 2. I am able to process the data but I always get the intensity as zero. Is there a way I could get ...
Rajas Joshi's user avatar
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Missing Bullet Inverse Dynamics while building tesseract-collision

I am trying to build the tesseract motion planning environment for ROS, but I am running into the following error while building the tesseract-collision package using catkin: ...
Anon's user avatar
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1 answer
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ROS3D.UrdfClient suddenly stopped loading meshes

I'm trying to visualize a 3d robot simulation on a web browser and I'm currently using the ros3djs library (not sure if this is the best choice yet). Some days ago I managed to visualize correctly the ...
Dario's user avatar
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"/gazebo/apply_body_wrench" service is missing

I want to apply force to an object in ROS2 Gazebo but "/gazebo/apply_body_wrench" service is not available in ros2 service list. After adding "...
Pratham's user avatar
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inconsistent bounce behaviour of ball in gazebo

I am trying to simulate a tennis ball in gazebo. The issue is that the ball is having inconsistent bouncing effects. Means the ball is bouncing different number of times when released from the same ...
Pratham's user avatar
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Sensor fusion with Kalman filter: what should go as "command" in case we have a choice?

Let's say I have a robot with few sensors and dif. drive. And I want to perform sensor fusion using UKF. Dif. drive can take commands, so my first thought was to use command (linear and angular speed) ...
Steve Brown's user avatar
1 vote
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Extrinsic matrices of sensors from tf_static_publisher

I have two lidar sensors, and an IMU, I also have the nodes of static_transfrom_publisher with the parameters in the standard format of: ...
Josh's user avatar
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ros2 commands fail on Jazzy when RMW_IMPLEMENTATION=rmw_cyclonedds_cpp

Description I have installed ROS 2 Jazzy on Ubuntu 22.04. If I just ros2 topic list and ros2 run demo_nodes_cpp talker on the ...
Ruben Alves's user avatar
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5 views

ROS Melodic Visual mono SLAM with Orb Slam 2

Im trying to use ROS for the first time with a project that needs to use visual slam with a mono camera input. I am using ROS1 Melodic with the orb_slam_2 package along side turtle bots to get a basic ...
Jack Duffy's user avatar
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15 views

How to apply force to an object in gazebo using script

I am trying to spawn an object in gazebo at certain height and apply force to it in x direction at the same time(when the object is in the air). The object is being spawned successfully. But the force ...
Pratham's user avatar
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Latency spike in real time application (robotics arm)

I have set up my real time kernel Preempt_RT ( 5.15.0-1063-realtime) with Ubuntu pro. When I run ping test, I always got high max latency at 1.5 to 4ms, which is not ok, it has to be less than 1ms ...
bot24's user avatar
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1 vote
1 answer
33 views

Convert MCAP to ROS

I have an MCAP file, which I want to convert to ROS (or other storage formats). I couldn't find any documentation online. Is there any github project available. Any help is appreciated.
lerner1225's user avatar
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1 answer
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ROS2 Xacro/URDF file isn't displaying, Error: No transform from [] to []

I've created a URDF file using a few Xacro files, and for some reason as soon as I added in the caster wheel it started having problems. The chassis and caster both show up, but the caster just spawns ...
FalOn's user avatar
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Motor plugin in ROS2

I want to build a self-balancing robot. In the simulation of this robot, I need to have a motor plugin that allows me to set the wheel speeds and accurately implement the mathematical model of this ...
Hamid Khabazi's user avatar
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1 answer
18 views

Algorithm for turtlebot3 simulation

If I use the command roslaunch turtlebot3_gazebo turtlebot3_simulation.launch, the robot can automatically move around the environment's floor. I would like to know the algorithm running behind this ...
Encipher's user avatar
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1 vote
1 answer
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Configuring-ROS2-Environment

I am going about setting up ROS2 for the first time, and when I enter the command set | findstr -i ROS the output I receive is ...
Jace Michael's user avatar
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12 views

Simulate joint holding in gazebo

I am building a simulation of a custom-designed robotic arm. In the simulation, I am controlling it using 'effort_controllers/JointVelocityController'. However, I want the joint to remain still when ...
msl_2000's user avatar
0 votes
1 answer
22 views

Cmake error for ROS - cannot find the package

I follow the tutorial of Turtlebot3 to launch the turtlebot into the Gazebo environment. I am using OS - Ubuntu 20.04.1 LTS, ROS version - Noetic, Gazebo Version: 11.14.0. I received error while ...
Encipher's user avatar
  • 423
0 votes
1 answer
21 views

Can' find my custom node for a new behavior Tree plugin RO2 nav2 bt_navigator

Hey I'm trying to write a behavior tree plugin following this tutorial https://docs.nav2.org/plugin_tutorials/docs/writing_new_bt_plugin.html I'm on Ubuntu20.04 using Ros2 galactic and v3 for ...
Evrard Emonot's user avatar
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1 answer
20 views

ROS launch not working for turtlebot

OS - Ubuntu 16.04.7 LTS ROS version - Kinetic Gazebo Version: 7.0.0 command working: roslaunch gazebo_ros empty_world.launch commands not working: ...
Encipher's user avatar
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pylon-ros-camera [closed]

The content displayed by roslaunch info shows 'BayerGR8' | 'NO_ROS_EQUIVALENT', with only the Mono8 encoding format available. My camera model supports RGB encoding format, and I can capture color ...
HT Ling's user avatar
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1 answer
21 views

Follow point by point a quintic polynomial

I am using ROS Noeticfor the first time, practically applying theoretical robotics concepts. I have to move the robot's TIAgo arm, following a quintic polynomial trajectory in Cartesian space. From ...
TIAgo_robot's user avatar
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1 answer
10 views

More than 80% of the sampled goal states fail to satisfy the constraints imposed on the goal sampler

The following error can occur when doing constrained motion planning More than 80% of the sampled goal states fail to satisfy the constraints imposed on the goal sampler. Is the constrained sampler ...
Rufus's user avatar
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7 views

Robot_pose_ekf not publishing transformation of odom_combined frame

I am using the ROS melodic and trying to fuse the odom and IMU using robot_pose_ekf package Here is my code ...
Usama Arshad's user avatar
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1 answer
19 views

Command manager not available- Cannot run Move-to-start

OS: Ubuntu 22.04 ROS distro: Humble Libfranka 0.13.2 Franka_ROS2 Preempt_RT enabled Hi, I was following the tutorial link to run ros2 launch franka_bringup move_to_start_example_controller.launch.py ...
bot24's user avatar
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0 answers
7 views

Some links are not showing up under Gazebo's models

I have a .xacro file that is being used to create a urdf to be sent to Gazebo, which is being launched using ROS2. I am trying to update a codebase from ROS to ROS2. I don't get any errors - I have ...
Ara's user avatar
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0 votes
1 answer
29 views

Unable to build ROS package

I've been trying to compile this project using the steps in the documentation and ran into the following issue when running colcon build --symlink-install. Yes, I ...
Allison's user avatar
1 vote
0 answers
12 views

Error [rospack] Error: package 'rosbag_storage' not found when using bag_reader.exe on Windows

I have compiled a bag_reader.exe program using VS2019 on a Windows environment to read ROS bag files. While the program works perfectly fine in the ROS environment, I encounter the following error ...
sheng1_2's user avatar
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0 answers
7 views

How to publish joint state of a robot to another robot?

I am totally new in teleoperation, and I am stuck on how to publish joint state of a robot to another robot? I am using Franka Emika, and Franka_ros has a franka_hw that reads joint state, but this is ...
bot24's user avatar
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0 votes
0 answers
14 views

Rviz shows pixels for the camera output

I want to visualize KUKA iiwa robot with the kinect camera sensor in rviz. The visualization shows pixels for the entire perspective of the camera (as shown in image attached). When the robot moves ...
Aashiv's user avatar
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0 votes
1 answer
17 views

When to call rospy.init_node() in a ROS client?

I am new to developing ROS services and clients. All of the tutorials I found online are quite simple. Most refer to the client as the client node yet I never see a call to ...
jasonsf's user avatar
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0 answers
10 views

How to assign array values in rosmsg result part of message in actionlib in Rospy (ROS 1 in python)

Good day all, I'm trying to create an action server that sends three float64 vectors each containing the x, y and z coordinates of a point following this tutorial: https://www.youtube.com/watch?v=...
user123456098's user avatar
1 vote
1 answer
13 views

Dynamic assignment of joints to ros2_controllers

Is it possible to assign all joints of a robot (or a series of specific joints according to a pattern, e.g. left_joint_*) to a controller in the controller configuration YAML or does each joint ...
Maximilian von Unwerth's user avatar
1 vote
1 answer
20 views

Camera is not detected through pylon-ros-camera package

OS: Distributor ID: Ubuntu Description: Ubuntu 20.04.6 LTS Release: 20.04 Codename: focal I installed pylon_7.5.0 and was able to build the ...
theateist's user avatar
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1 vote
0 answers
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Collision Checking using Moveit (python wrapper) for a set of Joint Positions

I have a set of robot joint positions which I found by sweeping through the allowed joint positions with a fixed delta. This gives me about a set of ~2 million joint positions. Now, I want to check ...
robot_collision's user avatar
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How to Set Up Teleultrasound with Single-PC Control for Dual Franka Emika Robot Arms

I am trying to set up teleultrasound with both the master system and slave system using Franka Emika robot arm. Franka Emika controller is connected to a PC with a network cable. Is there anyway that ...
bot24's user avatar
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0 votes
0 answers
43 views

Laser Scan rotates with robot

Required Info: Operating System: Ubuntu 22.04 LTS ROS2 Version: ROS2 Humble The LaserScan rotating with robot when I use teleop_twist_keyboard to manually rotate the robot. I am using the rplidar_ros ...
Vrushab Jain's user avatar
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0 answers
10 views

/usr/bin/ld: cannot find -lpackage_name

I am new to ROS2 (Foxy) and CMake. I have a ROS2 package called senso_gui_control, that is dependent on another package in my workspace (...
shellyshampaine's user avatar
0 votes
1 answer
29 views

ROS2 robot_localization how to correct x and y position when hit a wall

I started using the robot_localization EKF node recently to fuse encoder odometry and IMU data (I'm using a differential robot with 2 wheels). It works well because if I rotate the robot by hand, the ...
Gaetano Pispisa's user avatar
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0 answers
18 views

how do I replace built-in algorithms on my PixHawk/ardupilot with custom reinforcement learning algorithms m?

I’ve been working on a drone project for 2 months now. Originally, it was supposed to take 2 only weeks. Everyday, there’s a new, unexpected problem that ends of being more difficult than it seems. My ...
user3081098's user avatar

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