Update launch files

launch/sim_sample.launch

@@ -24,11 +24,11 @@
   </include>
 
   <include file="$(find iri_skid_steering_gazebo)/launch/spawn.launch">
-    <arg name="name"  value="$(arg ns)"/>
+    <arg name="ns"    value="$(arg ns)"/>
     <arg name="model" value="pioneer3_example"/>
-    <arg name="x"   value="0.0"/>
-    <arg name="y"   value="0.0"/>
-    <arg name="yaw" value="0.0"/>
+    <arg name="x"     value="0.0"/>
+    <arg name="y"     value="0.0"/>
+    <arg name="yaw"   value="0.0"/>
   </include>
 
   <node name="rviz"

launch/spawn.launch

 <?xml version="1.0" encoding="UTF-8"?>
 <launch>
 
-  <arg name="name"  default="robot"/>
+  <arg name="ns"    default="robot"/>
   <arg name="model" default="pioneer3_example"/>
-  <arg name="x"   default="0.0"/>
-  <arg name="y"   default="0.0"/>
-  <arg name="yaw" default="0.0"/>
+  <arg name="x"     default="0.0"/>
+  <arg name="y"     default="0.0"/>
+  <arg name="yaw"   default="0.0"/>
   
   <include file="$(find iri_pioneer3_description)/launch/description.launch">
-    <arg name="name" value="$(arg name)"/>
-    <arg name="model" value="$(arg model)"/>
+    <arg name="ns"            value="$(arg ns)"/>
+    <arg name="model"         value="$(arg model)"/>
+    <arg name="static_wheels" value="true" />
   </include>
   
-  <group ns="$(arg name)">
+  <group ns="$(arg ns)">
   
-    <node name="spawn_urdf" pkg="gazebo_ros" type="spawn_model" args="-param robot_description -urdf -model $(arg name) -x $(arg x) -y $(arg y) -z 0 -R 0 -P 0 -Y $(arg yaw)" />
+    <node name="spawn_urdf"
+          pkg="gazebo_ros"
+          type="spawn_model"
+          args="-param robot_description -urdf -model $(arg ns) -x $(arg x) -y $(arg y) -z 0 -R 0 -P 0 -Y $(arg yaw)" />
   
   </group>