APU负载压气机叶轮叶片的共振频率是维修叶轮过程中需要控制的一项指标。在分析了APU组成结构、主要作用及受力分析的基础上 ,对叶片的损坏情况进行了讨论 ,提出了将叶片共振频率测试仪与二级模糊综合评判的数学方法相结合 ,对叶轮的状态进行综合评价的新颖实用的方法 ,这将对 APU维修水平的发展起到积极的促进作用 The resonant frequency of the APU-loaded compressor impeller blades is an indicator that needs to be controlled during the maintenance of the impeller. Based on the analysis of the structure, main function and stress analysis of APU, the damage situation of the blade was discussed. The combination of the blade resonance frequency tester and the mathematical method of the second level fuzzy comprehensive evaluation was put forward. The condition of the impeller A comprehensive and practical evaluation of the new method, which will APU maintenance level played a positive role in promoting