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bjoernellens1 2023-11-20 12:12:37 +01:00 committed by GitHub
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urdf/inertial_macros.xacro
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<?xml version="1.0"?>
<robot xmlns:xacro="http://www.ros.org/wiki/xacro" >
<!-- Specify some standard inertial calculations https://en.wikipedia.org/wiki/List_of_moments_of_inertia -->
<!-- These make use of xacro's mathematical functionality -->
<xacro:macro name="inertial_sphere" params="mass radius *origin">
<inertial>
<xacro:insert_block name="origin"/>
<mass value="${mass}" />
<inertia ixx="${(2/5) * mass * (radius*radius)}" ixy="0.0" ixz="0.0"
iyy="${(2/5) * mass * (radius*radius)}" iyz="0.0"
izz="${(2/5) * mass * (radius*radius)}" />
</inertial>
</xacro:macro>
<xacro:macro name="inertial_box" params="mass x y z *origin">
<inertial>
<xacro:insert_block name="origin"/>
<mass value="${mass}" />
<inertia ixx="${(1/12) * mass * (y*y+z*z)}" ixy="0.0" ixz="0.0"
iyy="${(1/12) * mass * (x*x+z*z)}" iyz="0.0"
izz="${(1/12) * mass * (x*x+y*y)}" />
</inertial>
</xacro:macro>
<xacro:macro name="inertial_cylinder" params="mass length radius *origin">
<inertial>
<xacro:insert_block name="origin"/>
<mass value="${mass}" />
<inertia ixx="${(1/12) * mass * (3*radius*radius + length*length)}" ixy="0.0" ixz="0.0"
iyy="${(1/12) * mass * (3*radius*radius + length*length)}" iyz="0.0"
izz="${(1/2) * mass * (radius*radius)}" />
</inertial>
</xacro:macro>
</robot>