IMU: What is the "w" in the IMU data
Hello there, i use the Gazebo IMU-Plugin to generate sensor data of an IMU for my robot. An IMU message looks like the following: header: ... orientation: x: -9.881865455454e-324 y:...
View Articlefailed to fetch current robot state
Dear all, I want to use MoveIt to make Baxter follow a trajectory in cartesian space (first on simulation and then on the real robot). Unfortunately I am facing an issue when trying to get the robot's...
View ArticleHow can I publish Twist messages to /gazebo node(amcl_demo.launch)
Hello! I'm runnning TurtleBot on rviz, and I want to publish Twist messages to the "/gazebo" node in order to control robot's velocity. I wrote a publisher as below but it didn't work. How can I solve...
View Article"roscore" is not initializing - ROS MELODIC
I have installed ROS_MELODIC in my Ubuntu 18.04.1 LTS machine. When I started the ros master with *roscore*, I got an exception as quoted. > `... logging to...
View ArticleMy first URDF for a Scara Arm shows in rViz but not Gazebo.
Hi, thanks so much in advance for your guidance. I am new to ROS but have gotten through the Turtlebot 2 tutorials with a Create 2 Turtlebot I built and am now trying to create a URDF for a Scara arm I...
View ArticleHector Quadrotor Demo: Take Off Not Working.
Hello, I am trying to use the `hector_quadrotor_demo`, but the UAV is not taking off. I followed the [wiki](http://wiki.ros.org/hector_quadrotor/Tutorials/Quadrotor%20outdoor%20flight%20demo "Quadrotor...
View Articlerospy.get_time() returns 0 when using gazebo
Hi, When I run my code, I run into two problems. First, when I call `rospy.get_time()`, it returns 0. Secondly, in my while loop, perhaps due to the first issue, it only iterates once. Here is my...
View ArticleError [Model.cc:932] Unable to find link[link] Error [Plugin.hh:156] Failed...
Hello, During gazebo simulation, I meet the following errors: > Error [Model.cc:932] Unable to find link[link] Error [Plugin.hh:156] Failed to load plugin libgazebo_ros_camera.so:...
View Articlehow to call pause_physics service
i cant seem to do: pause_physics_client=rospy.ServiceProxy('/gazebo/pause_physics',PausePhysics) there doesn't seem to be a PausePhysics.srv anywhere under gazebo_msgs/srv I can see that the service is...
View Articleproblem with kobuki gazebo simulation
I'm trying to simulate kobuki in gazebo based on http://wiki.ros.org/kobuki/Tutorials/Gazebo%20Simulation#Overview I can bring up the empty world and the playground world. but when I try to launch the...
View ArticleVR Headset for ROS
Hey! We think about buying a VR Headset. Partially for the lulz, but it also would be great to be able to use it within RVIZ or Gazebo so you walk around your robot before it is built. AFAIR the Vive...
View ArticleIn Gazebo, my robot can't see AR tag
OS : Ubuntu 16.04 ROS : Kinetic Simulator : Gazebo I made an AR tag model using Blender. (.dae) And make a SDF file for Gazebo. I can see the AR tag in Gazebo. ---------- 4 0 0 0 0 0true2 0 0 0 0...
View ArticleJointPositionController does not post on /joint_states topic
Hi, I was following the ros tutorial on how to use urdf in gazebo with ros: http://wiki.ros.org/urdf/Tutorials/Using%20a%20URDF%20in%20Gazebo However, when I start roslaunch urdf_sim_tutorial...
View ArticleHow can I add a pre-designed path with some obstacles in the Gazebo
Hey all, I'm new to the Gazebo. I'm trying to build the following Gazebo world for the vehicle to follow the path and have obstacle avoidance. My understanding is first of all, add the texture...
View ArticleAdd elements (obstacles, walls, etc.) in a URDF file
I've just started to learn how to implement an URDF. To do it, I'm following the [tutorials](http://wiki.ros.org/urdf/Tutorials) about URDF in ROS Wiki. But, those tutorials only talk about how to...
View ArticleCollada File flicker in gazebo
I need to load ArUco marker inside gazebo environment. I created a Cuboid with sketchup, and embedded the ArUco Marker image to one face of the cuboid (shown below) then I export the dae file for the...
View ArticleSimulating quadrotor with Realsense in Gazebo
Dear all, i am trying to make a real quadrotor with realsense so as to avoid the obstacles, but before that, i think it will be necessary to simulate this in the gazebo to try the algrithm, cause you...
View ArticleMigrating KUKA youbot Gazebo simulation from Fuerte to Melodic ROS
Hi there, I am trying to run and simulate the KUKA robot in gazebo simulation. the original package is based on Electric/fuerte ROS, the real robot comes with one of the old distributions.. currently...
View ArticleUsing ROS Rviz to control the UR5 with OnRobot RG2 Gripper
Hello there! My objective is to control the UR5 robotic arm with the RG2 Gripper from OnRobot ([link here](https://onrobot.com/products/)) using Rviz for both the simulated robot in Gazebo and the Real...
View ArticleDifference between and 1
Hi, Could anyone give me some explanation the difference between dynamics damping, and mu1, mu2 in the urdf ? As I understand it, mu1 and mu2 are tangential friction forces applied between body and...
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