On raspberrypi (kinetic)
树莓派上安装好了已经...就省略了ttyusb之类步骤
~~roslaunch hls_lfcd_lds_driver hlds_laser.launch~~
~~roslaunch hls_lfcd_lds_driver view_hlds_laser.launch~~
roslaunch ar_track_alvar turtlebot3.launch →proper tf
add laserscan
Odometry is the use of data from motion sensors to estimate change in position over time.(标识了前进的向量)
Launch virtual turtlebot in Rviz: roslaunch turtlebot3_fake turtlebot3_fake.launch
Do things like in real world: roslaunch turtlebot3_teleop turtlebot3_teleop_key.launch