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2021-09-05 11:22:26 -0500 marked best answer save position of robot online slam?

Hi

I want to save the current position of robot while the navigation with online slam is running and then i can set those saved position as 2d goals in navigation with static map!

i can get current position of the robot in map frame when i am running navigation stack with static map by subscribing to amcl/pose topic. but in navigation with online slam amcl does not publishes any point. So how can i get robots current position in online slam?

thanks!

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2018-06-27 02:46:53 -0500 marked best answer Sleep command in launch file?

Hi, Is there any way to make a launch file sleep between executing different nodes and launch files? Also is there any way to write some logs from launch file ?

Thanks!

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2017-08-01 09:54:25 -0500 asked a question Custom analyzer group

Custom analyzer group Did anybody try to write a custom AnalyzerGroup by inheriting it? Is it even possible? Here is m

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2017-05-22 06:54:01 -0500 commented answer PoseStamped as flexbe app userdata

I already solved it, but thanks for your complete descriptions, I'm really looking forward to more tutorials. ;-)

2017-05-22 06:52:10 -0500 marked best answer PoseStamped as flexbe app userdata

I am very new to the flexbe app and now I want to use the 'PublishPoseState' in my behavior, but I don't know how can I define a state machine user data with PoseStamped Type, Is there any example or tutorial for that (obviously defining a string message is very simple)?

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2017-05-19 05:04:26 -0500 asked a question PoseStamped as flexbe app userdata

PoseStamped as flexbe app userdata I am very new to the flexbe app and now I want to use the 'PublishPoseState' in my be

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2016-01-11 06:03:26 -0500 marked best answer calculating covariances of robot's odometry ?

Hi we are using RosAria for our pioneer robot, it has an odometry topic named pose, but the values of its covariances are always zero. how can i calculate covariances for odometry message? Actually i want to give RosAria to robot_pose_ekf for combining robot's odometry with IMU data but robot_pose_ekf does not accepts zero covariances!

2015-11-26 03:28:09 -0500 marked best answer Simple Navigation Problem

Hi,

I have integrated a Pioneer3AT mobile robot with ROS 2d navigation stack. It's scan matches are completely correct all the time, but sometimes when i send it a navigation goal, it keeps rotating for a few seconds. specially when it is moving through a door. also the planned path for the robot is very near to the walls, I know that there is a lots of parameters in navigation stack to solve this problems, but i don't know which one is the right one!

Any body has experienced these kind of problems ?

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2015-04-27 09:17:29 -0500 marked best answer base_link to base_footprint transform ?

Hi, I am trying to use robot_pose_ekf for my navigation stack, I have done every thing according to this thread but I faced a problem about my transformations! Robot_pose_ekf is publishing a base_footprint tf, but i dont know how should i connect base_link tf to base_footprint tf. what is the relation between them?

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2015-01-18 06:27:52 -0500 asked a question xacro.py generates empty urdf file

I am using following command to convert *.urdf.xacro to *.urdf in ROS indigo,ubuntu 14.04:

rosrun xacro xacro.py a.urdf.xacro > a.urdf

also

rosrun xacro xacro.py -o a.urdf a.urdf.xacro

content of a.urdf.xacro(just for test):

<?xml version="1.0"?>
<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
<property name="base_mass" value="3.7000" />
<xacro:macro name="hunter">
    <xacro:macro name="hunter_robot" >
        <link name="base_link" />
    </xacro:macro>
</xacro:macro>
</robot>

and the content of generated urdf:

<?xml version="1.0" ?>
<!-- =================================================================================== -->
<!-- |    This document was autogenerated by xacro from a.urdf.xacro                   | -->
<!-- |    EDITING THIS FILE BY HAND IS NOT RECOMMENDED                                 | -->
<!-- =================================================================================== -->
<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
</robot>

I have faced this problem in two different machines. any idea?

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2014-10-22 05:01:34 -0500 marked best answer problem in transform from map to base

Hi, when i am setting up a navigation stack for my pioneer robot but when i am running move_base.launch after receiving a static map from map_server its writing below warning: "Waiting on transform from /base_footprint to /map to become available before running costmap , tf error."

currently my tf_tree is something like this:

odom_combined---> base_footprint ----> base_laser

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2014-09-12 15:34:02 -0500 commented answer Optris package

Did you test hydro branch of optris_drivers in ROS indigo? since hydro and indigo have very similar build infrastructures i think it would be compiled in ROS indigo either.

2014-09-11 14:33:21 -0500 answered a question Optris package

I have used this package for my optris pi200 thermal camera, it's very stable and easy to use,

Please explain more about your problem, as far as i remember, it is not too difficult to build this package. Just like other ROS packages, use "catkin_make" to build the pacakge, and also follow instructions in the optris_driver ROS page.

2014-09-08 09:53:37 -0500 asked a question rosserial and wireless communication

Hi,

I am using APC220 Radio Communication Module on my arduino atmega2560, in order to communicate with my computer wirelessly. i have written a simple publisher/subscriber node for my arduino using arduino ide and ros_lib, it's works fine using usb to serial cable, but when i'm using APC220(which is actually acts as an serial interface, conntected toRX/TX pins), i am getting following errors:

[ERROR] [WallTime: 1410187017.536715] Tried to publish before configured, topic id 125 
[ERROR] [WallTime: 1410187017.538328] Tried to publish before configured, topic id 125
[WARN] [WallTime: 1410187017.549967] Serial Port read returned short (expected 16 bytes, received 13 instead).
[WARN] [WallTime: 1410187017.550437] Serial Port read failure: 
[INFO] [WallTime: 1410187017.550810] Packet Failed :  Failed to read msg data
[INFO] [WallTime: 1410187017.551095] msg len is 16

I am almost sure about my hardware settings and baud rates, because it's works with a single publisher, my problem is a node with subscriber and publisher working simultaneously.

Is there any tips about using rosserial_arduino with wireless modules? Is there any body who has experienced APC220 modules with ROS and Arduino?

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