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2019-12-10 01:04:09 -0500 marked best answer About local planner ?

Hi all,

I'd like to implement a new local planner in move_base. My new planner is based on a Fuzzy-PID controller and is implemented in c++.

My question is: can I integrate it in the ROS's navigation stack? and how match is it difficult or easy to do?

waiting for your answers and your help. Best regards.

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2018-08-16 02:46:56 -0500 commented answer Add extra information to a map created by Gmapping

Thank you for the answer Peter.

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2018-08-07 07:40:15 -0500 asked a question Add extra information to a map created by Gmapping

Add extra information to a map created by Gmapping Dear all, I would like to add an extra information to a map created

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2018-07-09 13:56:52 -0500 marked best answer Get (x,y) coordinates of an obstacle from a map

Hello all, I need help,

Can someone tell me how to get the (x,y) coordinates of an obstacle from a 2d map created with gmapping.

I'm working with a Turtlebot robot, ROS Fuerte in Ubuntu.

After retrieving the position ((x,y) coordinates), can we remove the obstacle from the map.

Is it possible to add an obstacle to a created map in a specified position ? if yes How ?

any help is appreciated !

waiting for your answers :)

Regards.

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2017-04-30 03:05:12 -0500 marked best answer global_planner changing parameters

Hi folks,

I'd like to change the following parameters in the global_planner hydro-devel package to false to use the A* algorithme:

~<name>/use_dijkstra (bool, default: true)
If true, use dijkstra's algorithm. Otherwise, A*.

But I can't find the file in which I must make changes !!

EDIT:

File: move_base.launch.xml:

<!-- 
    ROS navigation stack with velocity smoother and safety (reactive) controller
-->
<launch>
  <include file="$(find turtlebot_navigation)/launch/includes/velocity_smoother.launch.xml"/>
  <include file="$(find turtlebot_navigation)/launch/includes/safety_controller.launch.xml"/>
  <arg name="odom_topic" default="odom" />
  <node pkg="move_base" type="move_base" respawn="false" name="move_base" output="screen">
  <param name="base_global_planner" value="global_planner/GlobalPlanner" />              
    <rosparam file="$(find turtlebot_navigation)/param/costmap_common_params.yaml" command="load" ns="global_costmap" />
    <rosparam file="$(find turtlebot_navigation)/param/costmap_common_params.yaml" command="load" ns="local_costmap" />
    <rosparam file="$(find turtlebot_navigation)/param/local_costmap_params.yaml" command="load" />
    <rosparam file="$(find turtlebot_navigation)/param/global_costmap_params.yaml" command="load" />
    <rosparam file="$(find turtlebot_navigation)/param/base_local_planner_params.yaml" command="load" />
    <rosparam file="$(find turtlebot_navigation)/param/move_base_params.yaml" command="load" />
    <remap from="cmd_vel" to="navigation_velocity_smoother/raw_cmd_vel"/>
    <remap from="odom" to="$(arg odom_topic)"/>
  </node>
</launch>

There's no Planner.yaml or global_planner.yaml that contains the parameter that I'd like to change !

Can someone help me please.

Regards.

2017-04-20 16:36:19 -0500 marked best answer package install problem !! minecraft_ros

Hi all, I'm trying to install this package: minecraft-ros

But it fails :( showing me this error when i execute make:

/opt/ros/hydro/2schematic/build$ make
[ 33%] Built target rgbd2schematic
[ 66%] Built target octomap2schematic
[ 83%] Building CXX object CMakeFiles/pcd2schematic.dir/src/pcd_converter.cpp.o
/opt/ros/hydro/2schematic/src/pcd_converter.cpp: In member function ‘virtual bool rgbd_2_schematic::PcdConverter::convertData(rgbd_2_schematic::Schematic&)’:
/opt/ros/hydro/2schematic/src/pcd_converter.cpp:120:42: error: no matching function for call to ‘getMinMax3D(rgbd_2_schematic::PointCloudT&, rgbd_2_schematic::PointT&, rgbd_2_schematic::PointT&)’
/opt/ros/hydro/2schematic/src/pcd_converter.cpp:120:42: note: candidates are:
/usr/include/pcl-1.7/pcl/filters/voxel_grid.h:58:3: note: void pcl::getMinMax3D(const PCLPointCloud2ConstPtr&, int, int, int, Eigen::Vector4f&, Eigen::Vector4f&)
/usr/include/pcl-1.7/pcl/filters/voxel_grid.h:58:3: note:   candidate expects 6 arguments, 3 provided
/usr/include/pcl-1.7/pcl/filters/voxel_grid.h:76:3: note: void pcl::getMinMax3D(const PCLPointCloud2ConstPtr&, int, int, int, const string&, float, float, Eigen::Vector4f&, Eigen::Vector4f&, bool)
/usr/include/pcl-1.7/pcl/filters/voxel_grid.h:76:3: note:   candidate expects 10 arguments, 3 provided
/usr/include/pcl-1.7/pcl/filters/voxel_grid.h:143:3: note: template<class PointT> void pcl::getMinMax3D(const typename pcl::PointCloud<PointT>::ConstPtr&, const string&, float, float, Eigen::Vector4f&, Eigen::Vector4f&, bool)
/usr/include/pcl-1.7/pcl/filters/voxel_grid.h:160:3: note: template<class PointT> void pcl::getMinMax3D(const typename pcl::PointCloud<PointT>::ConstPtr&, const std::vector<int>&, const string&, float, float, Eigen::Vector4f&, Eigen::Vector4f&, bool)
make[2]: *** [CMakeFiles/pcd2schematic.dir/src/pcd_converter.cpp.o] Error 1
make[1]: *** [CMakeFiles/pcd2schematic.dir/all] Error 2
make: *** [all] Error 2

CAN YOU HELP ME PLEASE, I NEED HELP !!

thx in advance ..

2017-04-19 16:02:43 -0500 marked best answer How to replace binary package with catkin package ?

Hi all,

I'd like to reinstall the same package with catkin. The package is already installed using sudo apt-get install.

Can someone tell me how can I replace the existing package with catkin.

I'm using ROS Hydro, and the package that I'd to replace is rosserial.

Thanks in advance.

regards.

2017-04-19 16:02:28 -0500 marked best answer update source package ?

Hi all,

I'd like to apply changes mentioned here: https://github.com/ros-drivers/rosser... and here: http://answers.ros.org/question/19759...

Can someone tell me which package should I update and how to update it ?

I'm using ROS Hydro.

thanks in advance.

regards.

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2016-06-09 10:00:57 -0500 asked a question Arduino 9 Axes Motion Shield

Hello everybody,

Can I use this arduino shield as IMU in my mobile robot ? Arduino 9 Axes Motion Shield: http://www.arduino.org/learning/refer...

Thank you in advance for your help.

Best regards.

2016-05-27 10:24:51 -0500 asked a question Add special location in Gmapping maps

Hi everybody,

Can you tell me if it's possible to add a special location in a map created by Gmapping so when the robot reaches this position it knows that it's in this position ?

Example: In the map I mark the saloon as special position. When the robot reaches the saloon, he must knows that it's in the saloon !

Is this possible ?

Thanks in advance for your answers.

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2016-05-08 15:23:24 -0500 marked best answer odometry and gyro replacement for my new robot using smart-phone or tablet ?

Hi there,

I'd like to know if it's possible to get odometry and gyro data from a tablet or smart-phone and publish them in corresponding topics via Wifi for example ??

is it possible ?

if yes, is it difficult to do ?

Waiting for your answers.

Kind regards.

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2016-05-04 09:50:37 -0500 asked a question Quaternion problem !?

Hello,

I have a problem with this function: geometry_msgs::Quaternion odom_quat= tf::createQuaternionMsgFromYaw(th);

when I give the input value "th" in degree it functions and the robot turns but with bad precision. And when I give the input in radians it doesn't function at all !!!

I don't know where's the problem !

Any suggestion please !

Regards.

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2015-12-15 11:27:39 -0500 commented question issue with move_base for a robot with rotational center at the back

Hi, I'm facing the same problem ! did you found a solution ? if yes could you share it with us please ..

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2015-12-13 03:26:51 -0500 asked a question odom problem with quaternion !

Hi,

I'm facing the same problem like this one: http://answers.ros.org/question/20771...

Can any one help me please ?

regards.

2015-12-13 03:21:06 -0500 commented question odom code please help

Hi, I'm facing the same problem. Did you find a solution to this ?