多重故障模式下的电动伺服系统故障建模方法  

Multiple-fault modeling and reconfiguration of electrical servo system

作　　者：高智刚[1] 李朋[1] 周军[1] 

机构地区：[1]西北工业大学精确制导与控制研究所,西安710072

出　　处：《中国惯性技术学报》2016年第1期135-140,共6页Journal of Chinese Inertial Technology

基　　金：国家重点基础研究发展计划(1973-6131567)

摘　　要：针对电动伺服系统的多重故障建模问题,提出了基于仿真模型重构和故障模型嵌套组合的多重故障建模方法。将电动伺服系统划分为若干功能单元,在各功能单元仿真模型基础上,提炼故障描述函数,利用统一故障表达式构建各功能单元故障模型。为了有效描述系统多重故障,提出了功能单元内多故障模型逐层嵌套+功能单元间故障模型组合的故障建模方法,重点分析并给出了不同类型多重故障的故障模型嵌套原则。仿真分析和实验验证结果表明,所建立故障模型可有效描述多重故障发生时的系统工作性能,提出的多重故障建模方法合理有效,具有普遍适用性,为故障诊断、构建故障知识库和容错控制仿真验证等提供了良好的研究手段。Aiming at the problem of multiple-fault modeling for electrical servo system, a multiple-fault modeling method was presented based on the reconfiguration of simulation model and faults model nesting. The electrical servo system was divided into some function units, and the fault model of every function unit was built according to the uniform fault expression. To describe the multiple faults of system, the modeling method was proposed by using both the level-wise nest for the inner faults of function unit and the fault model combination when the faults exist in different function units. The nest principle under different types of multiple faults are analyzed and given. The simulation and experiment results indicate that the multiplefault model can effectively describe the fault characteristics of electrical servo system, and the modeling method is valid and applicable, which can supply the research platform for fault diagnosis, establishing the fault knowledge base and the simulation verification for fault-tolerant control.

关 键 词：电动伺服系统 故障建模 多重故障 故障模型嵌套 功能单元 模型重构 

分 类 号：TP215[自动化与计算机技术—检测技术与自动化装置]