Modelo para simulación MYRAbot (urdf+gazebo)

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Revision as of 10:31, 12 November 2013 by Fernando (talk | contribs) (→‎URDF kinect)

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Modelo del MYRAbot

Se ha comenzado realizado un modelo de la estructura del MYRAbot a le que se le ha añadido la base Roomba, la cámara kinect y el brazo modelado. Hemos comenzado creando un package que va a contener el modelo de nuestro robot, que llamaremos "myrabot_fer_modelo", con la dependencia urdf.

URDF estructura MYRAbot

Se ha realizado previamente un modelo 3D de la estructura con un programa CAD, del que vamos a emplear las partes con una geometria singular, ya que el diseño empleando los elementos geométricos básicos sería complicado.

Diseño CAD 3D de la estructura del MYRAbot

Para el archivo principal crearemos un archivo llamdo "estructura-myrabot.xacro" en el directorio "urdf" de el package anteriormente creado, con el siguiente contenido: 

<?xml version="1.0"?>

<robot>

	<include filename="$(find myrabot_fer_modelo)/urdf/estructura-myrabot-macros.xacro" />

<macro name="estructura_myrabot" params="parent *origin">	

<joint name="world_joint" type="fixed">
  <parent link="${parent}"/>
  <child link="e_base_1_link"/>
  <insert_block name="origin" />
</joint>
       
  <link name="e_base_1_link">
    <inertial>
      <mass value="0.05"/>
      <origin rpy="0 0 0" xyz="0.135 0.135 ${0.015/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0.135 0.135 ${0.015/2}"/>
      <geometry>
        <cylinder radius="0.135" length="0.015" />
      </geometry>
      <material name="wood">
		<color rgba="${205/255} ${133/255} ${63/255} 1" />
	  </material>
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0.135 0.135 ${0.015/2}"/>
      <geometry>
        <cylinder radius="0.135" length="0.015" />
      </geometry>
    </collision>
  </link> 

<separador_base id="1" />
<e_separador_base id="1" xsim="1" ysim="1" />

<separador_base id="2" />
<e_separador_base id="2" xsim="1" ysim="-1" />

<separador_base id="3" />
<e_separador_base id="3" xsim="-1" ysim="-1" />

<separador_base id="4" />
<e_separador_base id="4" xsim="-1" ysim="1" />


<joint name="base_2" type="fixed">
  <parent link="e_base_1_link"/>
  <child link="e_base_2_link"/>
  <origin xyz="0 0 0.135" rpy="0 0 0" />
</joint>

  <link name="e_base_2_link">
    <inertial>
      <mass value="0.05"/>
      <origin rpy="0 0 0" xyz="0.135 0.135 ${0.02/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0.135 0.135 ${0.02/2}"/>
      <geometry>
        <cylinder radius="0.135" length="0.02" />
      </geometry>
      <material name="wood">
		<color rgba="${205/255} ${133/255} ${63/255} 1" />
	  </material>
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0.135 0.135 ${0.02/2}"/>
      <geometry>
        <cylinder radius="0.135" length="0.02" />
      </geometry>
    </collision>
  </link>

<joint name="pilar" type="fixed">
  <parent link="e_base_2_link"/>
  <child link="e_pilar_link"/>
  <origin xyz="0 0 0.02" rpy="0 0 0" />
</joint>
  
<link name="e_pilar_link">
    <inertial>
      <mass value="0.08"/>
      <origin rpy="0 0 0" xyz="0 0 ${0.7/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_pilar.stl" scale="0.001 0.001 0.001"/>
      </geometry>
      <material name="wood" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_pilar.stl" scale="0.001 0.001 0.001"/>
      </geometry>
    </collision>
  </link>
 
<joint name="botonera" type="fixed">
  <parent link="e_base_2_link"/>
  <child link="e_botonera_link"/>
  <origin xyz="0 0 0.02" rpy="0 0 0" />
</joint>
  
<link name="e_botonera_link">
    <inertial>
      <mass value="0.06"/>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.1/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.1/2}"/>
      <geometry>
        <box size="0.2 0.09 0.1"/>
      </geometry>
      <material name="wood" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.1/2}"/>
      <geometry>
        <box size="0.2 0.09 0.1"/>
      </geometry>
    </collision>
  </link>
  
<joint name="start_button_1" type="fixed">
  <parent link="e_botonera_link"/>
  <child link="e_start_button_1_link"/>
  <origin xyz="-0.06 0 0.1" rpy="0 0 0" />
</joint>

<link name="e_start_button_1_link">
    <inertial>
      <mass value="0.001"/>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.002/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.002/2}"/>
      <geometry>
        <cylinder radius="0.009" length="0.002"/>
      </geometry>
      <material name="black">
		  <color rgba="0 0 0 1"/>
      </material>		  
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.002/2}"/>
      <geometry>
        <cylinder radius="0.009" length="0.002"/>
      </geometry>
    </collision>
  </link>
  
<joint name="start_button_2" type="fixed">
  <parent link="e_start_button_1_link"/>
  <child link="e_start_button_2_link"/>
  <origin xyz="0.0 0 0.002" rpy="0 0 0" />
</joint>

<link name="e_start_button_2_link">
    <inertial>
      <mass value="0.001"/>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.004/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.004/2}"/>
      <geometry>
        <cylinder radius="0.0075" length="0.004"/>
      </geometry>
      <material name="green">
		  <color rgba="0 1 0 1"/>
      </material>		  
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.004/2}"/>
      <geometry>
        <cylinder radius="0.0075" length="0.004"/>
      </geometry>
    </collision>
  </link>
  
<joint name="emergency_button_1" type="fixed">
  <parent link="e_botonera_link"/>
  <child link="e_emergency_button_1_link"/>
  <origin xyz="0.06 0 0.1" rpy="0 0 0" />
</joint>

<link name="e_emergency_button_1_link">
    <inertial>
      <mass value="0.001"/>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.015/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.015/2}"/>
      <geometry>
        <cylinder radius="0.0125" length="0.015"/>
      </geometry>
      <material name="metal" />		  
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.015/2}"/>
      <geometry>
        <cylinder radius="0.0125" length="0.015"/>
      </geometry>
    </collision>
  </link>
  
<joint name="emergency_button_2" type="fixed">
  <parent link="e_emergency_button_1_link"/>
  <child link="e_emergency_button_2_link"/>
  <origin xyz="0.0 0 0.015" rpy="0 0 0" />
</joint>

<link name="e_emergency_button_2_link">
    <inertial>
      <mass value="0.001"/>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.003/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.003/2}"/>
      <geometry>
        <cylinder radius="0.018" length="0.003"/>
      </geometry>
      <material name="red">
		  <color rgba="1 0 0 1"/>
      </material>		  
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0.135 ${0.165-(0.09/2)} ${0.003/2}"/>
      <geometry>
        <cylinder radius="0.018" length="0.003"/>
      </geometry>
    </collision>
  </link>              

<joint name="base_kinect" type="fixed">
  <parent link="e_pilar_link"/>
  <child link="e_base_kinect_link"/>
  <origin xyz="0 0 ${0.395-0.155}" rpy="0 0 0" />
</joint>
  
<link name="e_base_kinect_link">
    <inertial>
      <mass value="0.02"/>
      <origin rpy="0 0 0" xyz="0 0 ${0.005/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_base_kinect.stl" scale="0.001 0.001 0.001"/>
      </geometry>
      <material name="wood" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_base_kinect.stl" scale="0.001 0.001 0.001"/>
      </geometry>
    </collision>
  </link>
  
<joint name="base_brazo_1" type="fixed">
  <parent link="e_pilar_link"/>
  <child link="e_base_brazo_1_link"/>
  <origin xyz="0 0 ${0.708-(0.395-0.155)}" rpy="0 0 0" />
</joint>
  
<link name="e_base_brazo_1_link">
    <inertial>
      <mass value="0.03"/>
      <origin rpy="0 0 0" xyz="0 0 ${0.005/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_base_brazo_1.stl" scale="0.001 0.001 0.001"/>
      </geometry>
      <material name="wood" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_base_brazo_1.stl" scale="0.001 0.001 0.001"/>
      </geometry>
    </collision>
  </link>

<separador_base_brazo id="1" />
<e_separador_base_brazo id="1" xsim="1" ysim="1" />

<separador_base_brazo id="2" />
<e_separador_base_brazo id="2" xsim="1" ysim="-1" />

<separador_base_brazo id="3" />
<e_separador_base_brazo id="3" xsim="-1" ysim="-1" />

<separador_base_brazo id="4" />
<e_separador_base_brazo id="4" xsim="-1" ysim="1" />

<joint name="base_brazo_2" type="fixed">
  <parent link="e_base_brazo_1_link"/>
  <child link="e_base_brazo_2_link"/>
  <origin xyz="0 0 0.074" rpy="0 0 0" />
</joint>
  
<link name="e_base_brazo_2_link">
    <inertial>
      <mass value="0.005"/>
      <origin rpy="0 0 0" xyz="0 0 ${0.005/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_base_brazo_2.stl" scale="0.001 0.001 0.001"/>
      </geometry>
      <material name="wood" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_base_brazo_2.stl" scale="0.001 0.001 0.001"/>
      </geometry>
    </collision>
  </link>    

<joint name="soporte_1" type="fixed">
  <parent link="e_pilar_link"/>
  <child link="e_soporte_1_link"/>
  <origin xyz="0 0 ${0.995-(0.708-0.155)-(0.395-0.155)}" rpy="0 0 0" />
</joint>
  
<link name="e_soporte_1_link">
    <inertial>
      <mass value="0.05"/>
      <origin rpy="0 0 0" xyz="0 0 ${0.64/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_soporte_1.stl" scale="0.001 0.001 0.001"/>
      </geometry>
      <material name="wood" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_soporte_1.stl" scale="0.001 0.001 0.001"/>
      </geometry>
    </collision>
  </link>
  
<joint name="soporte_2" type="fixed">
  <parent link="e_soporte_1_link"/>
  <child link="e_soporte_2_link"/>
  <origin xyz="0 0.2 0.61" rpy="-0.12 0 0" />
</joint>
  
<link name="e_soporte_2_link">
    <inertial>
      <mass value="0.01"/>
      <origin rpy="0 0 0" xyz="0 0 ${0.06/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 -0.2 -0.03"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_soporte_2.stl" scale="0.001 0.001 0.001"/>
      </geometry>
      <material name="wood" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 -0.2 -0.03"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_soporte_2.stl" scale="0.001 0.001 0.001"/>
      </geometry>
    </collision>
  </link>   

<joint name="monitor" type="fixed">
  <parent link="e_soporte_2_link"/>
  <child link="e_monitor_link"/>
  <origin xyz="0 -0.2 -0.09" rpy="0 0 0" />
</joint>
  
<link name="e_monitor_link">
    <inertial>
      <mass value="0.1"/>
      <origin rpy="0 0 0" xyz="0 0 ${0.180/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_monitor.stl" scale="0.001 0.001 0.001"/>
      </geometry>
      <material name="wood" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/e_monitor.stl" scale="0.001 0.001 0.001"/>
      </geometry>
    </collision>
  </link>
  
<joint name="pantalla" type="fixed">
  <parent link="e_monitor_link"/>
  <child link="e_pantalla_link"/>
  <origin xyz="0.135 ${0.135-0.005-0.03-0.0001} 0.086" rpy="0 0 0" />
</joint>
  
<link name="e_pantalla_link">
    <inertial>
      <mass value="0.0001"/>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <box size="0.22 0.0001 0.130" />
      </geometry>
      <material name="black" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <box size="0.22 0.0001 0.127" />
      </geometry>
    </collision>
  </link>       
 
<gazebo_propiedades nombre="e_base_1_link" material="LightWood" />

<gazebo_propiedades nombre="e_base_2_link" material="LightWood" />

<gazebo_propiedades nombre="e_separador_base_1_link" material="Grey" />

<gazebo_propiedades nombre="e_separador_base_2_link" material="Grey" />

<gazebo_propiedades nombre="e_separador_base_3_link" material="Grey" />

<gazebo_propiedades nombre="e_separador_base_4_link" material="Grey" />

<gazebo_propiedades nombre="e_separador_base_brazo_1_link" material="Grey" />

<gazebo_propiedades nombre="e_separador_base_brazo_2_link" material="Grey" />

<gazebo_propiedades nombre="e_separador_base_brazo_3_link" material="Grey" />

<gazebo_propiedades nombre="e_separador_base_brazo_4_link" material="Grey" />

<gazebo_propiedades nombre="e_pilar_link" material="LightWood" />

<gazebo_propiedades nombre="e_base_kinect_link" material="LightWood" />

<gazebo_propiedades nombre="e_base_brazo_1_link" material="LightWood" />

<gazebo_propiedades nombre="e_base_brazo_2_link" material="LightWood" />

<gazebo_propiedades nombre="e_botonera_link" material="LightWood" />

<gazebo_propiedades nombre="e_start_button_1_link" material="Black" />

<gazebo_propiedades nombre="e_start_button_2_link" material="Green" />

<gazebo_propiedades nombre="e_emergency_button_1_link" material="Grey" />

<gazebo_propiedades nombre="e_emergency_button_2_link" material="Red" />

<gazebo_propiedades nombre="e_soporte_1_link" material="LightWood" />

<gazebo_propiedades nombre="e_soporte_2_link" material="LightWood" />

<gazebo_propiedades nombre="e_monitor_link" material="LightWood" />

<gazebo_propiedades nombre="e_pantalla_link" material="Black" />

</macro>
  
</robot>

Los archivos empleados, con los modelos de malla 3D ".stl", en la descrición de la estructura del robot se pueden descargar a continuación, deben guardarse en el directorio "meshes" de nuestro package:

Los macros que estamos usando en el archivo principal del URDF son los que se muestran continuación, que guardaremos en un archivo llamado "estructura-myrabot-macros.xacro" en el directorio "urdf" de nuestro package: 

<?xml version="1.0"?>

<robot>

<macro name="default_inertia_e">
	<inertia ixx="0.01" ixy="0.0" ixz="0.0" iyy="0.01" iyz="0.0" izz="0.01"/>
</macro>

<macro name="separador_base" params="id"> 
<joint name="separador_base_${id}" type="fixed">
  <parent link="e_base_1_link"/>
  <child link="e_separador_base_${id}_link"/>
  <origin xyz="0.135 0.135 0.015" rpy="0 0 0" />
</joint>
</macro>

<macro name="e_separador_base" params="id xsim ysim">
  <link name="e_separador_base_${id}_link">
    <inertial>
      <mass value="0.02"/>
      <origin rpy="0 0 0" xyz="${xsim*0.040} ${ysim*0.105} ${0.120/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="${xsim*0.040} ${ysim*0.105} ${0.120/2}"/>
      <geometry>
        <cylinder radius="0.0075" length="0.120" />
      </geometry>
      <material name="metal">
		<color rgba="${211/255} ${211/255} ${211/255} 1" />
	  </material>
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="${xsim*0.040} ${ysim*0.105} ${0.120/2}"/>
      <geometry>
        <cylinder radius="0.0075" length="0.120" />
      </geometry>
    </collision>
  </link> 
</macro> 

<macro name="separador_base_brazo" params="id"> 
<joint name="separador_base_brazo_${id}" type="fixed">
  <parent link="e_base_brazo_1_link"/>
  <child link="e_separador_base_brazo_${id}_link"/>
  <origin xyz="0.135 ${0.135-0.082} 0.075" rpy="0 0 0" />
</joint>
</macro> 

<macro name="e_separador_base_brazo" params="id xsim ysim">
  <link name="e_separador_base_brazo_${id}_link">
    <inertial>
      <mass value="0.002"/>
      <origin rpy="0 0 0" xyz="${xsim*0.029} ${ysim*0.019} ${0.034/2}"/>
      <default_inertia_e />
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="${xsim*0.029} ${ysim*0.019} ${0.034/2}"/>
      <geometry>
        <cylinder radius="0.002" length="0.034" />
      </geometry>
      <material name="metal" />
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="${xsim*0.029} ${ysim*0.019} ${0.034/2}"/>
      <geometry>
        <cylinder radius="0.002" length="0.034" />
      </geometry>
    </collision>
  </link> 
</macro>

<macro name="gazebo_propiedades" params="nombre material">
<gazebo reference="${nombre}">
  <material>Gazebo/${material}</material>
  <mu1>0.5</mu1>
  <mu2>0.5</mu2>
  <selfCollide>true</selfCollide>
  <turnGravityOff>false</turnGravityOff>  
</gazebo> 
</macro>

</robot>

URDF Roomba

Para la base móvil Roomba se ha empleado el modelo del turtlebot, aunque equipado con una base móvil create, esta tiene unas físicas y sensores similares a la nuestra. Para esto necesitamos instalar los stacks turtlebot y turtlebot_simulator, que contienen el modelo y los plugins para gazebo, respectivamente. Eliminando lo que no necesitamos del modelo del turtlebot y modificacndo el elemento de la base, el contenido del archivo que guardaremos con el nombre "roomba.xacro" en el directorio "urdf" de nuestro package, es el siguiente: 

<?xml version="1.0"?>

<robot xmlns:xacro="http://ros.org/wiki/xacro">

  <property name="M_PI" value="3.14159"/>

  <include filename="$(find myrabot_fer_modelo)/urdf/roomba-gazebo.xacro"/>

  <property name="base_x" value="0.33" />
  <property name="base_y" value="0.33" />

  <xacro:macro name="create">
    <material name="Green">
      <color rgba="0.0 0.8 0.0 1.0"/>
    </material>

  <link name="base_footprint">
    <inertial>
      <mass value="0.0001" />
      <origin xyz="0 0 0" />
      <inertia ixx="0.0001" ixy="0.0" ixz="0.0"
              iyy="0.0001" iyz="0.0" 
              izz="0.0001" />
    </inertial>

    <visual>
      <origin xyz="0 0 0" rpy="0 0 0" />
      <geometry>
        <box size="0.001 0.001 0.001" />
      </geometry>
      <material name="Green" />
    </visual>

    <collision>
      <origin xyz="0 0 0.017" rpy="0 0 0" />
      <geometry>
       <box size="0.001 0.001 0.001" />
      </geometry>
    </collision>
  </link>

  <link name="base_link">
    <inertial>
      <mass value="3.6" />
      <origin xyz="0 0 ${0.092/2}" />
      <inertia ixx="0.01" ixy="0.0" ixz="0.0"
        iyy="0.01" iyz="0.0" izz="0.5" />
    </inertial>

    <visual>
      <origin xyz=" 0 0 ${0.092/2}" rpy="0 0 0" />
      <geometry>
        <cylinder length="0.092" radius="0.17"/>
      </geometry>
      <material name="white">
	    <color rgba="1 1 1 1" />  
      </material>
    </visual>

    <collision>
      <origin xyz="0.0 0.0 ${0.092/2}" rpy="0 0 0" />
      <geometry>
        <cylinder length="0.092" radius="0.17"/>
      </geometry>
    </collision>
  </link>

  <link name="wall_sensor_link">
    <inertial>
      <mass value="0.01" />
      <origin xyz="0 0 0"/>
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0" izz="0.001" />
    </inertial>
  </link>


  <link name="left_cliff_sensor_link">
    <inertial>
      <mass value="0.01" />
      <origin xyz="0 0 0"/>
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0" izz="0.001" />
    </inertial>
  </link>

  <link name="right_cliff_sensor_link">
    <inertial>
      <mass value="0.01" />
      <origin xyz="0 0 0"/>
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0" izz="0.001" />
    </inertial>
  </link>



  <link name="leftfront_cliff_sensor_link">
    <inertial>
      <mass value="0.01" />
      <origin xyz="0 0 0"/>
      <inertia ixx="1.0" ixy="0.0" ixz="0.0"
        iyy="0.01" iyz="0.0" izz="0.01" />
    </inertial>
  </link>

  <link name="rightfront_cliff_sensor_link">
    <inertial>
      <mass value="0.01" />
      <origin xyz="0 0 0"/>
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0" izz="0.001" />
    </inertial>
  </link>


  <joint name="base_footprint_joint" type="fixed">
    <origin xyz="0 0 0.017" rpy="0 0 0" />        
    <parent link="base_footprint"/>
    <child link="base_link" />
  </joint>

  <joint name="base_wall_sensor_joint" type="fixed">
    <origin xyz="0.09 -0.120 0.042" rpy="0 0 -1.0" />        
    <parent link="base_link"/>
    <child link="wall_sensor_link" />
  </joint>

  <joint name="base_left_cliff_sensor_joint" type="fixed">
    <origin xyz="0.07 0.14 0.01" rpy="0 1.57079 0" />        
    <parent link="base_link"/>
    <child link="left_cliff_sensor_link" />
  </joint>

  <joint name="base_right_cliff_sensor_joint" type="fixed">
    <origin xyz="0.07 -0.14 0.01" rpy="0 1.57079 0" />        
    <parent link="base_link"/>
    <child link="right_cliff_sensor_link" />
  </joint>

  <joint name="base_leftfront_cliff_sensor_joint" type="fixed">
    <origin xyz="0.15 0.04 0.01" rpy="0 1.57079 0" />        
    <parent link="base_link"/>
    <child link="leftfront_cliff_sensor_link" />
  </joint>

  <joint name="base_rightfront_cliff_sensor_joint" type="fixed">
    <origin xyz="0.15 -0.04 0.01" rpy="0 1.57079 0" />        
    <parent link="base_link"/>
    <child link="rightfront_cliff_sensor_link" />
  </joint>

  <link name="left_wheel_link">
    <inertial>
      <origin xyz="0 0 0"/>
      <mass value="0.01" />
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0" izz="0.001" />
    </inertial>

    <visual>
      <origin xyz="0 0 0" rpy="0 1.5707 1.5707" />
      <geometry>
        <cylinder radius="0.033" length = "0.023"/>
      </geometry>
    </visual>

    <collision>
      <origin xyz="0 0 0" rpy="0 1.5707 1.5707" />
      <geometry>
        <cylinder radius="0.033" length = "0.023"/>
      </geometry>
    </collision>
  </link>

  <joint name="left_wheel_joint" type="continuous">
    <origin xyz="0 0.13 0.015" rpy="0 0 0"/>
    <parent link="base_link"/>
    <child link="left_wheel_link"/>
    <axis xyz="0 1 0"/>
  </joint>

  <link name="right_wheel_link">
    <inertial>
      <origin xyz="0 0 0"/>
      <mass value="0.01" />
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0" izz="0.001" />
    </inertial>

    <visual>
      <origin xyz="0 0 0" rpy="0 1.5707 1.5707" />
      <geometry>
        <cylinder radius="0.033" length = "0.023"/>
      </geometry>
    </visual>

    <collision>
      <origin xyz="0 0 0" rpy="0 1.5707 1.5707" />
      <geometry>
        <cylinder radius="0.033" length = "0.023"/>
      </geometry>
    </collision>
  </link>

  <joint name="right_wheel_joint" type="continuous">
    <origin xyz="0 -0.13 0.015" rpy="0 0 0"/>
    <parent link="base_link"/>
    <child link="right_wheel_link"/>
    <axis xyz="0 1 0"/>
  </joint>

  <link name="rear_wheel_link">
    <inertial>
      <origin xyz="0 0 0"/>
      <mass value="0.001" />
      <inertia ixx="0.0001" ixy="0.0" ixz="0.0"
        iyy="0.0001" iyz="0.0" izz="0.0001" />
    </inertial>

    <visual>
      <origin xyz="0 0 0" rpy="0 1.5707 1.5707"/>
      <geometry>
        <sphere radius="0.015" />
      </geometry>
    </visual>

    <collision>
      <origin xyz="0 0 0" rpy="0 1.5707 1.5707" />
      <geometry>
        <sphere radius="0.015" />
      </geometry>
    </collision>
  </link>

  <joint name="rear_castor_joint" type="fixed">
    <origin xyz="-0.13 0 0.0" rpy="0 0 0"/>
    <parent link="base_link"/>
    <child link="rear_wheel_link"/>
    <axis xyz="0 1 0"/>
  </joint>

  <link name="front_wheel_link">
    <inertial>
      <origin xyz="0 0 0" />
      <mass value="0.01" />
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0" izz="0.001" />
    </inertial>

    <visual>
      <origin xyz="0 0 0" rpy="0 1.5707 1.5707"/>
      <geometry>
        <sphere radius="0.018" />
      </geometry>
    </visual>

    <collision>
      <origin xyz="0 0 0" rpy="0 1.5707 1.5707" />
      <geometry>
        <sphere radius="0.018" />
      </geometry>
    </collision>
  </link>

  <joint name="front_castor_joint" type="fixed">
    <origin xyz="0.13 0 0.0" rpy="0 0 0"/>
    <parent link="base_link"/>
    <child link="front_wheel_link"/>
    <axis xyz="0 1 0"/>
  </joint>


  <joint name="gyro_joint" type="fixed">
    <axis xyz="0 1 0" />
    <origin xyz="0 0 0.04" rpy="0 0 0" />
    <parent link="base_link"/>
    <child link="gyro_link"/>
  </joint>
  <link name="gyro_link">
    <inertial>
      <mass value="0.001" />
      <origin xyz="0 0 0" rpy="0 0 0" />
      <inertia ixx="0.0001" ixy="0" ixz="0" iyy="0.000001" iyz="0" izz="0.0001" />
    </inertial>
  </link>

  <joint name="laser_joint" type="fixed">
    <origin xyz="-0.065 0 0.075" rpy="0 0 0" />
    <parent link="base_link" />
    <child link="laser" />
  </joint>

  <link name="laser">
    <visual>
      <geometry>
        <box size="0.02 0.035 0.002" />
      </geometry>
      <material name="Green" />
    </visual>
    <inertial>
      <mass value="0.001" />
      <origin xyz="0 0 0" />
      <inertia ixx="0.0001" ixy="0.0" ixz="0.0"
        iyy="0.0001" iyz="0.0"
        izz="0.0001" />
    </inertial>
  </link>
  
<gaezebo>
  <material>Gazebo/White</material>
</gaezebo>  
  
  <turtlebot_sim_imu/>
  <turtlebot_sim_laser/>
  <turtlebot_sim_create/>
  <turtlebot_sim_wall_sensors/>  
  
</xacro:macro>
  
</robot>

Para su uso en el simulador gazebo debemos añadir los plugins de los diferentes sensores de la base. Crearemos un archivo llamado "roomba-gazebo.xacro" en el directorio "urdf" de nuestro package con el siguiente contenido: 

<?xml version="1.0"?>

<robot xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller" xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface" xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor" xmlns:xacro="http://ros.org/wiki/xacro">


<xacro:macro name="turtlebot_sim_imu">
  <gazebo>
    <controller:gazebo_ros_imu name="imu_controller" plugin="libgazebo_ros_imu.so">
      <alwaysOn>true</alwaysOn>
      <updateRate>30</updateRate>
      <bodyName>gyro_link</bodyName>
      <topicName>imu/data</topicName>
      <gaussianNoise>${0.0017*0.0017}</gaussianNoise>
      <xyzOffsets>0 0 0</xyzOffsets> 
      <rpyOffsets>0 0 0</rpyOffsets>
      <interface:position name="imu_position"/>
    </controller:gazebo_ros_imu>
  </gazebo>
</xacro:macro>

<xacro:macro name="turtlebot_sim_laser">
  <gazebo reference="laser">
    <sensor:ray name="laser">
      <rayCount>180</rayCount>
      <rangeCount>180</rangeCount>
      <laserCount>1</laserCount>
      
      <origin>0.0 0.0 0.0</origin>
      <displayRays>false</displayRays>
      
      <minAngle>-130</minAngle>
      <maxAngle>130</maxAngle>
      
      <minRange>0.08</minRange>
      <maxRange>10.0</maxRange>
      <resRange>0.01</resRange>
      <updateRate>20</updateRate>
      <controller:gazebo_ros_laser name="gazebo_ros_laser_controller" plugin="libgazebo_ros_laser.so">
	<gaussianNoise>0.005</gaussianNoise>
	<alwaysOn>true</alwaysOn>
	<updateRate>20</updateRate>
	<topicName>scan</topicName>
	<frameName>laser</frameName>
	<interface:laser name="gazebo_ros_laser_iface" />
      </controller:gazebo_ros_laser>
    </sensor:ray>
  </gazebo>
</xacro:macro>

<xacro:macro name="turtlebot_sim_create">
  <gazebo>
    <controller:gazebo_ros_create name="create_controller" plugin="libgazebo_ros_create.so">
      <alwaysOn>true</alwaysOn>
      <node_namespace>turtlebot_node</node_namespace>
      <left_wheel_joint>left_wheel_joint</left_wheel_joint>
      <right_wheel_joint>right_wheel_joint</right_wheel_joint>
      <front_castor_joint>front_castor_joint</front_castor_joint>
      <rear_castor_joint>rear_castor_joint</rear_castor_joint>
      <wheel_separation>.260</wheel_separation>
      <wheel_diameter>0.066</wheel_diameter>
      <base_geom>base_link_geom_base_link</base_geom>
      <updateRate>40</updateRate>
      <torque>1.0</torque>
    </controller:gazebo_ros_create>
  </gazebo>
</xacro:macro>

<xacro:macro name="turtlebot_sim_wall_sensors">
  <gazebo reference="wall_sensor_link">
    <sensor:ray name="wall_sensor">
      <alwaysActive>true</alwaysActive>
      <rayCount>1</rayCount>
      <rangeCount>1</rangeCount>
      <resRange>0.1</resRange>

      <minAngle>0</minAngle>
      <maxAngle>0</maxAngle>

      <minRange>0.0160</minRange>
      <maxRange>0.04</maxRange>
      <displayRays>false</displayRays>
    </sensor:ray>
  </gazebo>

  <gazebo reference="left_cliff_sensor_link">
    <sensor:ray name="left_cliff_sensor">
      <alwaysActive>true</alwaysActive>
      <rayCount>1</rayCount>
      <rangeCount>1</rangeCount>
      <resRange>0.1</resRange>

      <minAngle>0</minAngle>
      <maxAngle>0</maxAngle>

      <minRange>0.01</minRange>
      <maxRange>0.04</maxRange>
      <displayRays>false</displayRays>
    </sensor:ray>
  </gazebo>

  <gazebo reference="right_cliff_sensor_link">
    <sensor:ray name="right_cliff_sensor">
      <alwaysActive>true</alwaysActive>
      <rayCount>1</rayCount>
      <rangeCount>1</rangeCount>
      <resRange>0.1</resRange>

      <minAngle>0</minAngle>
      <maxAngle>0</maxAngle>

      <minRange>0.01</minRange>
      <maxRange>0.04</maxRange>
      <displayRays>false</displayRays>
    </sensor:ray>
  </gazebo>


  <gazebo reference="leftfront_cliff_sensor_link">
    <sensor:ray name="leftfront_cliff_sensor">
      <alwaysActive>true</alwaysActive>
      <rayCount>1</rayCount>
      <rangeCount>1</rangeCount>
      <resRange>0.1</resRange>

      <minAngle>0</minAngle>
      <maxAngle>0</maxAngle>

      <minRange>0.01</minRange>
      <maxRange>0.04</maxRange>
      <displayRays>false</displayRays>
    </sensor:ray>
  </gazebo>

  <gazebo reference="rightfront_cliff_sensor_link">
    <sensor:ray name="rightfront_cliff_sensor">
      <alwaysActive>true</alwaysActive>
      <rayCount>1</rayCount>
      <rangeCount>1</rangeCount>
      <resRange>0.1</resRange>

      <minAngle>0</minAngle>
      <maxAngle>0</maxAngle>

      <minRange>0.01</minRange>
      <maxRange>0.04</maxRange>
      <displayRays>fan</displayRays>
    </sensor:ray>
  </gazebo>



  <gazebo reference="left_wheel_link">
    <mu1 value="10"/>
    <mu2 value="10"/>
    <kp value="100000000.0"/>
    <kd value="10000.0"/>
    <fdir value="1 0 0"/>
  </gazebo>

  <gazebo reference="right_wheel_link">
    <mu1 value="10"/>
    <mu2 value="10"/>
    <kp value="100000000.0"/>
    <kd value="10000.0"/>
    <fdir value="1 0 0"/>
  </gazebo>
  <gazebo reference="rear_wheel_link">
    <mu1 value="0"/>
    <mu2 value="0"/>
    <kp value="100000000.0"/>
    <kd value="10000.0"/>
  </gazebo>

  <gazebo reference="front_wheel_link">
    <mu1 value="0"/>
    <mu2 value="0"/>
    <kp value="100000000.0"/>
    <kd value="10000.0"/>
  </gazebo>
</xacro:macro>
</robot>

URDF kinect

Para la cámara kinect incluiremos el modelo y el plugin para el simulador en un solo archivo. Crearemos un archivo llamado "kinect.xacro" dentro del directorio "urdf" de nuestro package con el siguiente contenido: 

<?xml version="1.0"?>

<robot xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller" xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface" xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor" xmlns:xacro="http://ros.org/wiki/xacro">
	
  <property name="M_PI" value="3.14159"/>

<xacro:macro name="kinect" params="parent *origin">
  
  <joint name="base_camera_joint" type="fixed">
	<insert_block name="origin" />
    <parent link="${parent}" />
    <child link="camera_link" />
  </joint>

  <link name="camera_link">
    <inertial>
      <mass value="0.01" />
      <origin xyz="0 0 0" />
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0"
        izz="0.001" />
    </inertial>

    <visual>
      <origin xyz=" 0 0 0 " rpy="0 0 0" />
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/kinect.dae"/>
      </geometry>
    </visual>

    <collision>
      <origin xyz="0.0 0.0 0.0" rpy="0 0 0" />
      <geometry>
        <mesh filename="package://myrabot_fer_modelo/meshes/kinect.dae"/>
      </geometry>
    </collision>

  </link>

  <joint name="camera_depth_joint" type="fixed">
    <origin xyz="0 0.018 0" rpy="0 0 0" />
    <parent link="camera_link" />
    <child link="camera_depth_frame" />
  </joint>

  <link name="camera_depth_frame">
    <inertial>
      <mass value="0.01" />
      <origin xyz="0 0 0" />
      <inertia ixx="0.001" ixy="0.0" ixz="0.0"
        iyy="0.001" iyz="0.0"
        izz="0.001" />
    </inertial>
  </link>

  <joint name="camera_depth_optical_joint" type="fixed">
    <origin xyz="0 0 0" rpy="${-M_PI/2} 0 ${-M_PI/2}" />
    <parent link="camera_depth_frame" />
    <child link="camera_depth_optical_frame" />
  </joint>

  <link name="camera_depth_optical_frame">
    <inertial>
      <mass value="0.001" />
      <origin xyz="0 0 0" />
      <inertia ixx="0.0001" ixy="0.0" ixz="0.0"
        iyy="0.0001" iyz="0.0"
        izz="0.0001" />
    </inertial>
  </link>

  <joint name="camera_rgb_joint" type="fixed">
    <origin xyz="0 -0.005 0" rpy="0 0 0" />
    <parent link="camera_link" />
    <child link="camera_rgb_frame" />
  </joint>

  <link name="camera_rgb_frame">
    <inertial>
      <mass value="0.001" />
      <origin xyz="0 0 0" />
      <inertia ixx="0.0001" ixy="0.0" ixz="0.0"
        iyy="0.0001" iyz="0.0"
        izz="0.0001" />
    </inertial>
  </link>

  <joint name="camera_rgb_optical_joint" type="fixed">
    <origin xyz="0 0 0" rpy="${-M_PI/2} 0 ${-M_PI/2}" />
    <parent link="camera_rgb_frame" />
    <child link="camera_rgb_optical_frame" />
  </joint>

  <link name="camera_rgb_optical_frame">
    <inertial>
      <mass value="0.001" />
      <origin xyz="0 0 0" />
      <inertia ixx="0.0001" ixy="0.0" ixz="0.0"
        iyy="0.0001" iyz="0.0"
        izz="0.0001" />
    </inertial>
  </link>

  <gazebo reference="camera_link">
    <sensor:camera name="camera">
      <imageFormat>R8G8B8</imageFormat>
      <imageSize>640 480</imageSize>
      <hfov>60</hfov>
      <nearClip>0.05</nearClip>
      <farClip>3</farClip>
      <updateRate>20</updateRate>
      <baseline>0.1</baseline>
      <controller:gazebo_ros_openni_kinect name="kinect_camera_controller" plugin="libgazebo_ros_openni_kinect.so">
        <alwaysOn>true</alwaysOn>
        <updateRate>20</updateRate>
        <imageTopicName>/camera/image_raw</imageTopicName>
        <pointCloudTopicName>/camera/depth/points</pointCloudTopicName>
        <cameraInfoTopicName>/camera/camera_info</cameraInfoTopicName>
        <frameName>camera_depth_optical_frame</frameName>
        <distortion_k1>0.0</distortion_k1>
        <distortion_k2>0.0</distortion_k2>
        <distortion_k3>0.0</distortion_k3>
        <distortion_t1>0.0</distortion_t1>
        <distortion_t2>0.0</distortion_t2>
      </controller:gazebo_ros_openni_kinect>
    </sensor:camera>
  </gazebo>
  
</xacro:macro>

</robot>

Ensamblado MYRAbot

< volver a principal

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