工程系统健康描述及基于GFRF方法的健康监测  

Engineering system health formulation and health monitoring based on GFRF approach

作　　者：高占宝[1] 李行善[1] 梁旭[1] 于劲松[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100083

出　　处：《北京航空航天大学学报》2006年第9期1026-1030,共5页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：健康管理概念是伴随着工程系统应用而产生的.针对目前复杂系统综合健康管理技术领域缺乏有效的系统健康表示方法的问题,提出了健康向量、健康指数、健康函数、健康态变映射、健康状态映射等一系列描述工程系统健康的基本概念.与传统的部件状态参数描述方法相比,引入健康向量等概念可以全面地描述系统级健康,并且能够有效地刻画系统健康的动态变化本质.分析了Volterra级数系统描述方法和广义频率响应函数分析技术,利用系统健康形式化定义构建系统健康向量,讨论了一类非线性系统基于广义频率响应函数的健康监测技术.以非线性弹簧-阻尼-质量块系统为研究对象,通过仿真计算,给出了系统健康监测数据与系统健康指数的对应关系.仿真实验结果证明了系统健康形式化描述方法的有效性以及基于广义频率响应函数健康监测方法的可行性.The health management concept was burgeoned as the application of engineering system. Several basic formulation definitions, such as health vector, health index, health function, were presented to mitigate the lack of formal concepts for the system health. Compared with the traditional condition parameters based component health description method, the engineering system level health condition can be effectively represented and the dynamic essence of health decrease can be revealed by using the health formulation definitions. Employing the Volterra series system description approach and analyzing the system through generalized frequency response function（ GFRF）, the system health vector was constructed based on the concepts of engineering system health, and the health of a kind of nonlinear system was monitored by the GFRF method. The nonlinear spring-mass-dashpot system was used as the research object. The relation between system health monitoring data and health index was given through simulation. And the simulated data show that the system health formulation definitions are effective and the system health monitoring approach based on GFRF is feasible.

关 键 词：系统健康 健康向量 健康指数 广义频率响应函数 健康监测 

分 类 号：TP202[自动化与计算机技术—检测技术与自动化装置] TP206.3[自动化与计算机技术—控制科学与工程]