摘要
针对迎角和侧滑角,特别在大迎角飞行情况下不能够精确测量的问题,研究了一种利用INS/GPS系统数据结合其他辅助系统来估计迎角和侧滑角的方法,利用INS/GPS系统测量的地速和总加速度信号结合飞机其他传感器和数学模型估计得到了迎角和侧滑角传感器的虚拟信号。通过仿真验证,该方法结构简单易于工程实现,并且估计出来的迎角和侧滑角误差小于0.10,具有很好的实时性。
For several reasons, the angle of attack and the sideslip angle cannot be measured accurately especially when angle of, attack is high. Having failed to find any detailed paper in the open literature on implementing Colgren's idea[3-6], we have to do research and development to get such technical details. We describe in some detail ten modules, which are based on above-mentioned details and can be used to implement Colgren's idea. Seven of these ten modules are separately described; they are: module for receiving INS/GPS system data, module for calculating body velocity and acceleration, aerodynamic calculation module, nonlinear aerodynamic calculation module, module for decomposition of nonlinear aerodynamic forces, module for estimating velocity components due to gust, module for calculating angle of attack and sideslip angle. Three modules are only listed in the schematically diagram; they are: module for calculating atmospheric data, module for calculating mass and center of gravity, module for calculating thrust of aircraft engine. Simulation results show preliminarily that: (1) the error in estimating angle of attack is less than 0.015°, (2) the error in estimating sideslip angle is less than 0.05°, (3) this method has good real-time capability and is easy to use in engineering application.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2005年第2期231-234,共4页
Journal of Northwestern Polytechnical University
关键词
INS/GPS系统
迎角
侧滑角
Acceleration
Aircraft engines
Atmospherics
Decomposition
Global positioning system
Inertial navigation systems
Real time systems
Velocity
