Questions tagged [state]

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Is it acceptable to convert the optimized control input state (acceleration) from my Model Predictive Controller to position

Good day, I hope you are well. I currently have an MPC position controller that optimizes a set of control input accelerations given a trajectory. u = [Ux_dot_dot Uy_dot_dot, Uz_dot_odt] However what ...
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SMACC or any other state machine for ROS2

Does anybody know when SMACC will be available for ROS2? Are there any other state machine libraries for ROS2 (preferably written in C++)? Originally posted by Artem on ROS Answers with karma: 709 on ...
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What is the Best SBC/mobile computing platform for ROS in 2020

HI Hope you are doing well. I am currently trying to make a scale self-driving rally car. TBH I don't have much idea about what I am doing but I made a some what functional self-driving car(In CARLA ...
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Proper usage of FlexBE' s "priority" container

Hello, I have recently started working with the flexbe ROS package ([http://wiki.ros.org/flexbe]) and have been having some difficulty understanding the purpose of the container of type "priority&...
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STOMP planner: Can only handle joint space goals

I'm trying to use STOMP with this tutorial. I want to plan a path with STOMP using a relative command for the endeffector. I'm trying to execute the following command to achieve this: go x 0.5 I ...
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How to exit from a ROS2 lifecycle launch script?

Hi, is there a way to interrupt the execution of a ROS2 launch script? In my case I have a lifecycle node managed by a lifecycle launch script. I would like to stop the execution of the script if the ...
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How to define a cost function for the 'general state cost integral' optimization objective of OMPL through MoveIt?

Hi, I'm relatively new to OMPL and MoveIt, but I'm fairly certain that I understand the capabilities of OMPL and that there are no tutorials for this. Maybe I'm just missing something. I'm hoping ...
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How to use GetModelState service from Gazebo in python

Hi, I'm actually working on Baxter robot with gazebo and I wanted to get the model state of cubes I create, so I made this method : ...
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UR10 state/real time interface

Hi everyone, I work on an UR5 with ROS Indigo and the following in my workspace: universal robot: https://github.com/ros-industrial/universal_robot/tree/indigo modern driver: https://github.com/...
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Zigzag ground track from eight shape flight path

Hi all, I tried to using ukf template recursively with navsat_transform node following http://answers.ros.org/question/200071/how-to-fuse-imu-gps-using-robot_localization/ With my eight flight path it ...
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Can a sequence of nodes be run in SMACH, behavior trees, or similar?

Hi, I am looking for a solution to the idea of creating a state machine as a sequence of nodes, or a sequence of concurrent nodes. Where the nodes, could be nodes of any type that a user has created. ...
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Spawning a robot arm with desired joint angles

I am trying to spawn a Kinova Mico arm in a gazebo simulation and Rviz. It spawns with all the joints at a value of 0. This means that they spawn in collision state, shown below. Both in rviz and they ...
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How do I publish gazebo position of a robot model on odometry topic

Hello, I have a robot model that runs using teleop key, and I want to publish its position and velocity on odometry topic. How should I achieve this? Thanks. Originally posted by cybodroid on ROS ...
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Is it ok to comment out joint state publisher node from turtlebot package?

When i comment it out i am getting an error showing there is no transformation between basefoot print and the left and right wheels. How to remove this error? Will the error go if i give some joint ...
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Subscribe /tilt_controller1/state to know current position

Hi people, I am working with Dynamixel Servomotor AX-12+ in ROS fuerte and I need to know its current position. In my code I subscribe to /tilt_controller1/state this is the info topic: ...
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Port Questions and (Initial) Feedback from Controller via Simple Message - ROS-I

Hello ROS-Community! I would still like to use my computer (Matlab, Simulink, C++) like a "controller" and therefor write a little driver. It is not yet necessary to run it on the real B&...
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State Estimation and Localization in Robot Navigation

Hello, I would like to ask the difference between a state estimator like robot_localization, or robot_pose_ekf and a ...
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Problems with static tf publisher

I am using my own URDF file for my custom built robot, the robot is properly visible and moves properly in rviz, If I run the simulation with /odom publisher. But when open the camera nodlet with ...
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retrieve tf transform

Hellow, I'm trying to obtain information from the a tf transform. I've loaded my URDF file in the parameter server and run robot and joint state publish. Here is a picture of some links : So I can ...
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ROS Answers SE migration: robot rviz tf

Hi, I am new to ROS. I tryed to use the Pioneer 3-AT urdf model provided in the p2os-Master stack.If I have a frame tree for this robot, and want to show this robot in a fixed map, in Rviz, I would ...
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Turtlebot_node Sensor State on Stage

I want to simulate a Turtlebot on Stage, more precisely its bumps_wheeldrops parameter from the TurtlebotSensorState message. How can I set it up? Here is my current launch file: ...
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using bullet physics 2.81 with my ros package (a new angle)

Hi everyone, I posted something similar earlier but have been tracking down the weirdness and now have more insight. But I still have a question on what is going on and thus am reposting. So the ...
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Get state of all links in a model in gazebo?

I know that I can get a list of all link states in gazebo by calling rostopic echo -n 1 /gazebo/link_states But what about getting link states for only a specific ...
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