一种嵌入式大气数据系统余度设计方案

A Redundancy Design of Flush Air Data Sensing System

针对嵌入式大气数据系统,从系统余度设计和数据解算余度设计两个角度进行分析,并提出解决方案。系统余度设计方面,介绍了测压点余度设计方法,并提出一种基于计算机内总线的双余度嵌入式大气数据计算机架构,使得系统设计余度在两余度以上;解算算法余度设计方面,建立参数测量模型,并推导了利用风洞数据进行参数解算的方法,得到参数后可应用最佳线性最小方差无偏估计对大气数据进行在线实时估计。

To the flush air data sensing system,the redandancy of system and parameters solution method are studied. First,pressure measurement hole layout method is presented briefly,system redundancy is designed with double redundancy based on computer-in-database for reliability. Then parameters solution model and method are constituted and educed. When these model parameters were got,air data will be computed with optimal linear least-square unbiased estimation.