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Nonlinear sensor fault diagnosis using mixture of probabilistic PCA models

机译:混合概率PCA模型的非线性传感器故障诊断

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摘要

This paper presents a methodology for sensor fault diagnosis in nonlinear systems using a Mixture of Probabilistic Principal Component Analysis (MPPCA) models. This methodology separates the measurement space into several locally linear regions, each of which is associated with a Probabilistic PCA (PPCA) model. Using the transformation associated with each PPCA model, a parity relation scheme is used to construct a residual vector. Bayesian analysis of the residuals forms the basis for detection and isolation of sensor faults across the entire range of operation of the system. The resulting method is demonstrated in its application to sensor fault diagnosis of a fully instrumented HVAC system. The results show accurate detection of sensor faults under the assumption that a single sensor is faulty.
机译:本文提出了一种使用概率主成分分析(MPPCA)模型的非线性系统中传感器故障诊断的方法。这种方法将测量空间分为几个局部线性区域,每个区域都与概率PCA(PPCA)模型相关联。使用与每个PPCA模型相关的转换,使用奇偶校验关系方案构造残差矢量。残差的贝叶斯分析构成了在系统整个操作范围内检测和隔离传感器故障的基础。所产生的方法在将其应用到功能齐全的HVAC系统的传感器故障诊断中得到了证明。结果表明在单个传感器有故障的假设下,传感器故障的准确检测。

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