解决ros indigo下hardware_interface/EffortJointInterface问题

urdf下的transmission属性如下：

  
    transmission_interface/SimpleTransmission
    
      hardware_interface/EffortJointInterface
    
    
      EffortJointInterface
      1
    
  

roalaunch时报错：

[FATAL] [1555737632.690393621]: No matching hardware interface found for 'hardware_interface/EffortJointInterface
[FATAL] [1555737632.690484449]: Could not initialize robot simulation interface

查阅资料：

https://github.com/ros-controls/ros_control/issues/280

大致是说gazebo版本问题，文件来自于kinetic，但是不可能换系统，遂放弃

ros官网对于transmission的阐述：

所以，去掉hardware_interface即可，改为：

  
    transmission_interface/SimpleTransmission
    
      EffortJointInterface
    
    
      EffortJointInterface
      1