IMU sensor plugin in drcsim

edit

hi all,

where does the .cpp code exist for this imu plugin. This is from

drcsim / ros / atlas_description / urdf / atlas.gazebo 

  <gazebo reference="imu_link">
    
    
    <sensor name="imu_sensor" type="imu">
      <always_on>1</always_on>
      <update_rate>1000.0</update_rate>
      <imu>
        <noise>
          <type>gaussian</type>
          
          <rate>
            <mean>0.0</mean>
            <stddev>2e-4</stddev>
            <bias_mean>0.0000075</bias_mean>
            <bias_stddev>0.0000008</bias_stddev>
          </rate>
          <accel>
            <mean>0.0</mean>
            <stddev>1.7e-2</stddev>
            <bias_mean>0.1</bias_mean>
            <bias_stddev>0.001</bias_stddev>
          </accel>
        </noise>
      </imu>
    </sensor>
  </gazebo>

Thanks