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《Journal of Zhejiang University(Engineering Science)》 2014-01
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Ground effect modeling for small-scale unmanned helicopter

CHEN Di-shi;ZHANG Yu;LI Ping;School of Aeronautics and Astronautics,Zhejiang University;Department of Control Science and Engineering,Zhejiang University;  
A relatively accurate ground effect model of the helicopter was constructed in order to stably control the small-scale unmanned helicopter when it flies close to the ground.The ground effect on lift force of small-scale unmanned helicopter was investigated through flight experiments and data analysis.When the helicopter hovered with different load,the value of lift force was respectively recorded while it was in ground effect(IGE)and out of ground effect(OGE).The numerical relationship between the lift force provided by the rotor and collective was calibrated.The value of collective was recorded when the helicopter hovered at different height with the same load.The lift force provided by ground effect was calculated by referring to the former calibrated results,as well as its proportion kof the deadweight of the helicopter. Then a function combining k and height was fitted.A nonlinear simulation model of the helicopter was built,when the helicopter hovered at certain height affected by the ground effect.The sequence of control data from real hovering test was respectively inputted into IGE model and OGE model.The comparison of these two simulation results showed that output of IGE model performed closer to the actual flight data— less variation in height,which improved the model of the helicopter in the vertical direction when involving in ground effect.
【Fund】: 中央高校基本科研业务费专项资金资助项目(2012QNA4024);; 国家自然科学基金资助项目(61005085)
【CateGory Index】: V275.1
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【Citations】
Chinese Journal Full-text Database 2 Hits
1 HOU Xin,LI Ping,HAN Bo,FANG Zhou(Department of Control Science and Engineering,Zhejiang University,Hangzhou 310027,China);Hierarchical hybrid control system of small unmanned helicopter[J];Journal of Zhejiang University(Engineering Science);2009-05
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【Co-citations】
Chinese Journal Full-text Database 2 Hits
1 KE Yi-jie;ZHOU Jiang-hua;WANG Sheng;College of Materials Science and Opto-electronic Technology,University of Chinese Academy of Sciences;Center for LTA System Research and Development,Academy of Opto-electronics,Chinese Academy of Sciences;;Feedback linearization controller design for quadrotor UAV with multiple specifications[J];Flight Dynamics;2013-06
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