分布嵌入式大气数据系统算法的初步研究  

Elementary Study on the Distributed Flush Air Data System Arithmetic

作　　者：王岩[1] 郑伟[1] 

机构地区：[1]沈阳飞机设计研究所,辽宁沈阳110035

出　　处：《飞机设计》2008年第6期5-11,26,共8页Aircraft Design

摘　　要：针对某型飞机给出了DFADS系统的构型描述，进行了DFADS的算法设计，算法采用了一种非物理映射的方法来建立各测压点压力和基本大气参数之间的关系。先是利用制定的多传感器数据表决规则表决出2～3对相关的测压点，然后通过建立相关测压点压力和其压力系数值之间的关系，利用这几对测压点的压力对事先建立的Cpi（α，β，Ma）映射关系表格数据库进行查表计算，从而得到当前的飞行状态。本文利用计算流体动力学（CFD）计算手段获得了332个飞行状态下飞机前机身14个测压点的表面压力系数数据，并以此为基础对DFADS的算法进行了仿真验证。结果表明，该DFADS的算法可以根据14个点的压力输入，正确地解算当前的大气参数。For a certain aircraft, the paper represents the system contexture of the DFADS and describes the algorithm design of the DFADS. The algorithm introduces a method of non-physical mapping to establish the relationship between the sensor data and the basic air data parameters. First, two or three pairs of relevant sensors are selected by the specific multi-sensor data voting rules. Then, the relationship between the data from the selected sensors and the corresponding pressure coefficient is established. Furthermore, the flight state is obtained with calculating and searching the established mapping relation database about Cpi （α, ,β, Ma ） . This paper employs computational fluid dynamics （CFD）method to acquire the surface pressure coefficient data Corresponding to the 14 measurement points on the forward fuselage under 332 fight states. Simulation results show that the algorithm of the DFADS is validated. As a result, the present air data parameter can be correctly calculated using the pressure data from 14 measurement points.

关 键 词：嵌入式大气数据系统 多传感器 数据表决 映射嵌入式 

分 类 号：V241.7[航空宇航科学与技术—飞行器设计]