基于模型的双转子-支撑系统快速故障识别方法  

Efficient fault identification method for dual rotor-supporting system using model-based method

作　　者：陈景明[1] 蒋东翔[1] 徐洪志[1] 

机构地区：[1]清华大学热能工程系电力系统和发电设备控制及仿真国家重点实验室,北京100084

出　　处：《航空动力学报》2013年第12期2797-2802,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(60979014)

摘　　要：建立了双转子-支撑系统的有限元模型,模拟了质量不平衡故障和局部轴弯曲故障下的振动信号.根据有限元模型,提出了基于模型的双转子-支撑系统故障识别方法,依次通过单一故障遍历、双故障遍历和三故障遍历方法,实现了故障快速准确识别.仿真结果表明:该方法能够准确识别单一故障和多故障,同时确定故障发生的位置、严重程度和相位情况,优化了故障识别过程,理想情况下减少了98.9%的计算量,加快了故障识别的速度.此外,比较了添加了不同信噪比噪音信号的诊断结果,诊断结果相对误差控制在1%左右,表明该方法具有良好的抗噪声干扰的能力.The finite element model of dual rotor-supporting system was constructed.Based on the finite element model,vibration signal under the faults of mass unbalance and local shaft bow was simulated.A model-based method was developed to identify the fault in the dual rotor-supporting system.1-fault search method,2-fault search method and 3-fault search method were utilized to identify the fault efficiently and accurately.The validation results show that the method could identify single fault and multi-concurrent faults accurately and confirm the fault location,severity and phase simultaneously.This method optimizes fault search process,which is used to decreases 98.9% calculation amount in the ideal situation,and accelerates fault identification.Besides,if comparing with the identification results by adding different adding noises,the relative error is around 1% which validates good robustness to noise.

关 键 词：双转子-支撑系统 故障识别 基于模型 质量不平衡 转轴弯曲 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]