【摘要】 针对旋转叶轮机械带冠叶片的轴向振动与叶顶间隙高精度同步测量需求，基于对测量模型的理论分析提出一种差分式双传感器排布的解耦测量方案，并通过进一步标定信号模量与物理参数间的三维多项式映射关系，实现针对带冠叶片的轴向振动位移与叶顶间隙的高精度反演。实验结果表明：当单周期采样点数达50点时，轴向振动位移与叶顶间隙预测值的决定系数分别达到0.995和0.988,均方根误差分别为0.064和0.058 mm;该测量方法通过分离信号间所包含的差模与共模特征有效解决了带冠叶片轴向振动与叶顶间隙解耦提取难题，并验证了差分式双传感器方案在实际测量中的可行性与精度优势，为带冠叶片健康监测提供了可靠技术手段。更多还原

【Abstract】 Based on the need for high-precision synchronous measurement of axial vibration and tip clearance in shrouded blades of rotating turbomachinery, a decoupling measurement scheme was proposed using a differential dual-sensor arrangement, derived from theoretical analysis of the measurement model. By further calibrating the three-dimensional polynomial mapping relationship between signal modulus and physical parameters, high-precision inversion of axial vibration displacement and tip clearance of shrouded blades was achieved. Experimental results show that when the number of sampling points per cycle reaches 50, the coefficients of determination for the predicted axial vibration displacement and tip clearance reach 0.995 and 0.988, respectively, with root mean square errors(RMSE) of 0.064 and 0.058 mm. This method effectively resolves the challenge of decoupling axial vibration and tip clearance in shrouded blades by separating the differential and common-mode features embedded in the signals, demonstrating the feasibility and accuracy advantages of the differential dual-sensor scheme in practical measurements, thereby providing a reliable technical approach for health monitoring of shrouded blades.更多还原