针对目前奇异值分解方法在航空发动机碰摩故障诊断处理中的不足,在基于矩阵分析推导奇异值残差重构信号能量成分的基础上,提出了利用奇异值残差重构突变信息的方法并建立了诊断流程.利用仿真信号对提出的方法进行了验证,得出了该方法与理论分析相符合.最后将其应用于某型航空发动机实测数据的处理,成功地判断出该发动机碰摩的时刻和碰摩故障的延展,结果表明该方法对航空发动机碰摩故障的诊断具有良好的效果. Aiming at the shortcomings of singular value decomposition method in the fault diagnosis and treatment of aero-engine rub-impact fault, based on the matrix analysis, the energy components of the singular value residual reconstruction signal are deduced. The method to reconstruct the mutation information by using the singular residuals Established the diagnostic process.The simulation method was used to verify the proposed method, and the method is consistent with the theoretical analysis.Finally, the method is applied to the processing of the measured data of a certain type of aeroengine and the successful judgment of the frictional The results show that this method has a good effect on the diagnosis of aero-engine rub-impact fault.