基于微分几何的非线性系统故障诊断

Journal of Huazhong University of Science and Technology (Nature Science Edition)(2015)

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Abstract
针对基于解析模型的非线性系统故障可诊断问题,提出了一种基于微分几何理论的故障可诊断判断方法。基于相对阶概念,定义了非线性系统的故障特征指数。对于单个故障单个输出的非线性系统,只要满足其故障特征指数小于等于系统的相对阶,就可证明故障是可以通过输出函数进行诊断的,即故障可诊断,并进一步证明了多输出非线性系统多个故障可诊断性的充要条件,同时进行可诊断性验证和数值模拟验证所提方法的有效性。
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Key words
fault diagnosis,nonlinear system,relative degree,fault characteristic index,differential geometry approach,analytical models
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