说明：  四旋翼无人直升机飞行控制系统的研究与设计，南京理工的一篇硕士论文，研究得详细，推荐的参考资料
(Theestablishment ofa perfec our-rotorunmanned helicopterfight control system platform will be helpful to further expand on four-rotor unmanned helicoptel"flight navigation research, control algorithm design，and control system development．The subject lays a solid foundation for further research on anew type of multi-purpose unmanned aerial vehicle(UAV) which would meet different conditions．)