摘要
在利用卡尔曼滤波新息序列进行泄漏检测的同时,引入强跟踪滤波器性能评价指标,对信号进行变点定位。管道压力信号经卡尔曼滤波后产生新息序列,结合序贯似然比检测(SPRT)检测新息序列,实现管道泄漏检测。强跟踪滤波(STF)跟踪平稳信号时,新息序列满足相互正交,发生泄漏突变后,产生跟踪误差,新息序列相互正交性被破坏。建立新息序列正交性评价指标,作为泄漏的突变点指示,同时实现滤波器工作性能监测。
While leak detecting,strong tracking filter performance evaluation index is introduced to localize the leak singularity signal.After Kalman filter generates innovation series,SPRT detects the innovation series,and complete leak detection.When strong tracking,filter is tracking stationary signal,innovation series are mutually orthogonal.The mutation leak which results in tracking error destroys the orthogonality of innovation series.Orthonormality evaluation index of innovation series is created.The index is used as indication of the leak singularity point,and monitoring the performance of the filter at the same time.
出处
《价值工程》
2011年第4期42-44,共3页
Value Engineering
关键词
管道泄漏
滤波器
序贯似然比检测
正交性评价指标
pipeline leak
filter
sequential probability ratio test
orthonormality evaluation index
