摘要
研究了直升机飞行力学模型辨识方法。首次将状态子空间系统辨识法应用于直升机飞行力学模型的辨识,并对其进行了改进。通过辨识成功地得到了悬停状态下小型直升机的高阶飞行力学模型,并进行了算例直升机仿真验证。结果表明,状态子空间法辨识具有良好的鲁棒性,不会出现经典辨识算法寻优过程中出现的局部极小现象,以及迭代带来的收敛性问题,对于辨识直升机飞行力学模型是非常适用和有效的。
The helicopter system identification based on the subspace system identification method is studied. The subspace algorithm is firstly used for helicopter flight dynamics system identification. The high order flight dynamics model is obtained by using system identification and is verified by the simulation. The result shows that the subspace algorithm is robust and suitable for the helicopter flight dynamics identification. Meanwhile, modeling, input designing, data filtering, and validation of model helicopter system identification are also presented.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2008年第5期589-593,共5页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国家自然科学基金(60705034)资助项目
关键词
飞行力学
系统辨识
子空间
直升机
flight dynamics
system identification
subspace
helicopter
