近年来，叶尖计时技术在透平机械叶片振动的监测与诊断中广泛应用，取得了较好的效果。然而叶尖计时法的测量结果为叶尖位移在旋转方向上的分量，叶片轴向位移导致的叶尖计时测点位置变化也会引入旋转方向上的位移分量，需对叶尖计时测量结果进行解耦，从中辨识叶片的轴向位移。依据叶尖计时测量原理，分析了测点位置变化对测量结果的影响关系，提出了基于叶尖计时的叶片轴向位移辨识方法。结合叶片型线方程，建立了融合叶片轴向位移的叶尖计时采样模型，仿真验证了所提方法的有效性。然后利用轴向位移可调式航空发动机压气机叶片实验台实测的叶尖计时信号进行实验验证，将转子叶片轴向位移辨识值与真实值进行对比，验证了本文所提方法的准确性。对于叶片运行状态的全面准确评估以及转子-叶片轴位移故障诊断具有重要的工程应用价值。

The blade tip-timing technology has improved in recent years and is now frequently utilized in the monitoring and diagnostics of turbomachinery blade vibration. It is necessary to decouple the blade tip-timing measurement results and determine the axial displacement of the blade from them, because the measurement results of the blade tip-timing method are the components of the blade tip displacement in the rotational direction. The change in the posi-tion of the blade tip-timing measurement point caused by the axial displacement of the blade will also introduce the displacement components in the rotational direction. The method of blade axial displacement identification based on blade tip-timing is proposed after an analysis of the link between the change in measurement point position and the measurement result. A sample model of blade tip timing that incorporates blade axial displacement is created in conjunction with the blade profile equation, and the efficiency of the suggested strategy is confirmed by simula-tion. The measured blade tip-timing signals from the adjustable axial displacement aero-engine compressor blade are then used for experimental verification. The axial displacement identification values for the rotor blade are compared to the real values to verify the accuracy of the proposed method. It has significant engineering applica-tion value for the thorough and accurate assessment of blade operation status and rotor-blade axial displacement fault diagnosis.