ardupilot sitl
$ git clone https://github.com/ArduPilot/ardupilot
$ git submodule update --init --recursive
$ git checkout Copter-4.0.3
ArduCopter$ ../Tools/autotest/sim_vehicle.py --map --console --out=udp:0.0.0.0:14560 -v ArduCopter
export PATH=$PATH:/usr/local/cuda-10.0/bin:/home/zhangym/Desktop/ardupilot/Tools/autotest:/home/zhangym/Desktop/ardupilot/gcc-arm-none-eabi-6-2017-q2-update/bin