基于热参数的单轴燃气轮机非线性故障诊断方法  

Nonlinear Component Fault Diagnosis of One Shaft Gas Turbine

作　　者：夏迪[1] 王永泓[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《上海交通大学学报》2008年第3期381-384,共4页Journal of Shanghai Jiaotong University

摘　　要：为了提高故障诊断精度,提出了基于PG9171E型单轴发电用燃气轮机(燃机)的非线性故障诊断方法.通过建立燃机仿真模型,以部件特性相对变化量为输入量,以模型计算值与实测值之间的误差为目标值,并选用适当的无约束优化方法,计算得到了目标值最小时的部件特性相对变化量,即部件故障发展情况.结果表明,所提出的非线性故障诊断方法收敛性好、精度高,适用于该类机型的故障评定工作.A nonlinear method for diagnosing component faults of engines was presented. It uses nonlinear gas path analysis techniques to determine the values of health parameters, with the help of a suitably for- mulated engine simulation model. Taking parameter deviations as independent parameter, the difference between model outputs and measurements as object, an object function can be built. By solving this function, the component fault can be verified. The different scenarios of faults on the PG9171E engine were considered in order to demonstrate the effectiveness of the method.

关 键 词：燃气轮机 故障诊断 梯度法 非线性 

分 类 号：TK39[动力工程及工程热物理—热能工程]