3Toshitaka T,Takashi A.Effects of meteorological conditions on the operation of a stratospheric platform[C].Tokyo:The 3rd Stratospheric Platform Systems Workshop,2001.
4Lang Jie,Guan Zhiguang.Design of intelligent automatic leveling control system based on ultrasonic distance measuring technology[C].Jinan:Proceedings of the IEEE International Conference on Automation and Logistics,2007:1620-1624.
5Hattori K,Fukui M,Jinno M,et al.PLC-based optical add/drop switch with automatic level control[J].Journal of Lightwave Technology,1999,12(17):2562-2571.
6John P.Leveling the playing field:ZF sachs′self-leveling monotube shock is a proven and inexpensive way to improve vehicle stability(supplier technology)[M].America:University of Michigan,2003.
7Dasgupta B,Mruthyunjaya T S.The stew art platform manipulator:a review[J].Mech-Anism and Machine Theory,2000,35(1):15-40.
