高速公路涡扇发动机低压涡轮轴自动断裂检测  

Automatic fracture detection of low pressure turboshaft of expressway turbofan engine

作　　者：周波 ZHOU Bo(The Electrification Company Of China First Highway Engineering Co.,Ltd.,Beijing 100102,China)

机构地区：[1]中交一公局电气化工程有限公司,北京100102

出　　处：《中国高新科技》2024年第23期131-132,共2页

摘　　要：发动机运行速度快,低压涡轮轴断裂程度过大可使双转子涡扇在高速路失稳,引发严重故障。为解决该问题,设计基于SIFT尺度空间的低压涡轮轴断裂自动检测方法:构建SIFT尺度空间,依涡轮轴应力特征向量取值定义奇异值估算条件以估计应力,匹配断裂特征点得出断裂时间与区域,实现自动检测。实验表明,该方法能在低压涡轮轴损坏裂度达5mm前检测到断裂行为,不会影响发动机稳定运行。The engine runs at high speed,and if the low-pressure turbine shaft breaks too severely,it can cause the twin-fan turbofan to become unstable at high speeds,leading to serious malfunctions.To solve this problem,a method for automatically detecting low-pressure turbine shaft fracture based on SIFT scale space is designed:a SIFT scale space is constructed,and the singular value estimation condition is defined based on the stress feature vector value to estimate the stress,the fracture feature points are matched to obtain the fracture time and region,and automatic detection is achieved.The experimental results show that the method can detect the fracture behavior before the low-pressure turbine shaft damage reaches 5mm,without affecting the stable operation of the engine.

关 键 词：发动机 低压涡轮 轴断裂检测 SIFT尺度空间 应力特征 奇异值估算 特征点 损坏裂度 

分 类 号：TN919[电子电信—通信与信息系统]