Tonystark124's profile - activity

I am working on a sample exercise of creating an arm robot with 3 links and 2 joints, by defining the urdf file. Am also following the tutorial from Mastering ROS for Robotics Programmin by Lentin Joseph. I have the following code

     <?xml version="1.0"?>
    <robot name="pan_tilt">

    <link name="base_link">
    <visual>
        <geometry>
            <cylinder length="0.01" radius="0.2"/>
        </geometry>
        <origin rpy="0 0 0" xyz="0 0 0"/>
        <material name="yellow">
            <color rgba="1 1 0 1"/>
        </material>
    </visual>
</link>

<joint name="pan_joint" type="revolute">
    <parent link="base_link"/>
    <child link="pan_link"/>
    <origin xyz="0 0 0.1"/>
    <axis xyz="0 0 0"/>
</joint>

<link name="pan_link">
    <visual>
        <geometry>
            <cylindder length="0.4" radius="0,04"/>
        </geomtry>
        <origin rpy="0 0 0" xyz="0 0 0.09"/>
        <material name="red">
            <color rgba="0 0 1 1"/>
        </material>
    </visual>
</link>

<joint name="tilt_joint" type="revolute">
    <parent link="pan_link"/>
    <child link="tilt_link"/>
    <origin xyz="0 0 0.2"/>
    <axis xyz="0 1 0"/>
</joint>

<link name="tilt_link">
    <visual>
        <geometry>
            <cylindder length="0.4" radius="0,04"/>
        </geomtry>
        <origin rpy="0 1.5 0" xyz="0 0 0.0"/>
        <material name="green">
            <color rgba="1 0 0 1"/>
        </material>
    </visual>
</link>
</robot>

while running

    check_urdf pan_tilt.urdf

I get the following error :

    Error:   Error reading end tag.
     at line 72 in /build/buildd/urdfdom-0.2.10+dfsg/urdf_parser/src/model.cpp
    ERROR: Model Parsing the xml failed

The code is straight out of the tutorials. Can you please point out where the mistake is?

Thank you for your help. It worked for debug.!

Error reading end tag - Model parsing the xml failed I am working on a sample exercise of creating an arm robot with 3 l

removing gazebo did it for me

I am trying to fly the ardrone parrot 2.0 using tum_ardrone ptam module. It is a rospackage, so I had to make it using

       rosmake tum_ardrone

The above compiled with 0 failures. however, when I do the following commad

       rosrun tum_ardrone drone_stateestimation

I get the following error

      [rosrun] Couldn't find executable named drone_stateestimation below

      /home/bojan/fuerte_workspace/tum_ardrone

I tried to google and get a solid pipelined solution to check for the reason for this error and solve it, but I did not get it. Am new to ubuntu, thus your help is much appreicated. This error doesn't seem to be package specific since the same package works fine in another laptop I tested. Am runnign Ubuntu in vmWare. Does that make any difference?

Thanks in advance

UPDATE :

This is the ROS_PACKAGE_PATH as you asked.

/home/bojan/fuerte_workspace:/opt/ros/fuerte/share:/opt/ros/fuerte/stacks

The first path is the path I get after roscd. Please let me know if this information helps.

I created a custom world using model editor in gazebo4,

I was trying to run a fun project where I can fly the quadrotor model through the rings I created in the custom world, using vision based algorithm and solution. Thus, I came across hector quadrotor and wanted to use the robot model in this world.

This command can spawn the quadrotor into an empty world

    roslaunch gazebo_ros empty_world.launch

but this requires to have gazebo_ros. and that would remove gazebo4 and this world I created. Can I spawn the hector quadrotor directly into this world of gazebo4?

Try running sudo rosdep update.

You will get few warning messages, but I guess we can skip that.

Hello,

I am trying to work with the Atlas in DRCSIM, and using this link, I knew how to eprform fake walking, and move the bot. This link shows how to visualize andlog using rviz, spawning the bot in an environment in Gazebo.

I used Atlas in vrc_task3 environment, launching it using

    VRC_CHEATS_ENABLED=1 roslaunch drcsim_gazebo vrc_task_3.launch

In the given environment, on a closer lookup, the head of the bot is seeing upwards, because of which, the images I view in rviz are also in the slanted angle. I am trying to implement SLAM solution using the Atlas DRCSIM and this is not a probable scenario for me. How can I move the head of the bot to align it with a straight view

(P.S : My points are less than 5 thus, am not able to upload images and show you the exact case, but hope you can understand. Please help me.)

issues resolved. thanks,! :)

fatal error: pcl/point_cloud.h: No such file or directory I got this error while compiling/installing. Any ideas if you had the same?

can you please point to where I can look for it?

I got the package from the link mentioned

I am trying to install viso2_ros package from here, when I encounter the following error while I catkin_make

    CMake Error at /opt/ros/indigo/share/catkin/cmake/catkin_package.cmake:296 (message):
    catkin_package() include dir 'include' does not exist relative to
    '/home/tonystark/vision_odometry/src/dlut_smartrob/dlut_motor_hokuyo'
    Call Stack (most recent call first):
    /opt/ros/indigo/share/catkin/cmake/catkin_package.cmake:98 (_catkin_package)
   dlut_smartrob/dlut_motor_hokuyo/CMakeLists.txt:50 (catkin_package)


  -- Configuring incomplete, errors occurred!
  See also "/home/tonystark/vision_odometry/build/CMakeFiles/CMakeOutput.log". 
  See also "/home/tonystark/vision_odometry/build/CMakeFiles/CMakeError.log".

Can you please tell me how I can solve this? Thanks in advance.

If the way am installing is wrong, can you please point me towards the correct direction?

I am using Ros Indigo by the way

Thanks a lot for the answer. It was really valuable. Could you please suggest me some good VSLAM package I can use to achieve the same?

Hello,

I am new to using DRCSIM and Atlas, but through tutorials, I was able to get through the basics of configuring rviz, gazebo,and the worlds for the bot.

Suppose I want to VSLAM with the Atlas in drcsim, in the world present in gazebo, can you please give me directions as to where I should start and how I can achieve this?