摘要
针对飞机状态监控中遇到的一阶导量特征提取问题进行了研究,提出了一种燃油流量特征提取方法。以飞参数据中的剩余燃油量为数据源,通过数据清洗去除剩余燃油量中的野值点和波动点,设计一种斜率约束的二次样条Hermite插值方法将离散的剩余燃油量数据转化为连续的剩余燃油量曲线,对剩余燃油量曲线求导提取出燃油流量值。进行了实例分析,分析结果表明,使用该方法提取的燃油流量估计值与燃油流量实测值之间相对预测误差较小,表明该燃油流量特征提取方法精度较高,可以用于飞机燃油流量监控。
The problems of first derivative feature extraction is researched and a fuel flew feature extraction method is presented. The method uses the fuel volume data which is recorded by flight data recorder as input, and gets rid of the outliers and wave points in the fuel volume data by data cleaning. Then the method transforms discrete fuel volume data into continuous fuel vol- ume estimation curve by using slope constraint quadratic spline Hermite interpolation. After that, fuel flow is obtained by deriva- tion of fuel volume estimation curve. The experimental result shows that the relative prediction error between measurement value of fuel flow and estimation value of the fuel flow is small, so the prediction accuracy of the estimation method is high and the method can be used in aero-engine fuel flow monitoring.
出处
《计算机工程与设计》
CSCD
北大核心
2014年第2期531-535,共5页
Computer Engineering and Design
关键词
特征提取
斜率约束插值
燃油流量
剩余燃油量
数据清洗
feature extraction
slope constraint interpolation
fuel flow
fuel volume
data cleaning
