基于微小形变测量的旋翼天平高精度测力校准系统

旋翼天平原位校准中,校准力精确加载是提高校准精度的重要因素。校准装置结构形变会给校准力加载造成误差,影响校准精度。针对这一问题,设计了旋翼天平测力校准系统。该系统采用激光三角法实现微小位移测量,通过测量立方靶块空间位置变化,计算力加载点位移;建立数学模型,分析结构形变对校准力加载影响,测量校准力。经实验,该系统可以消除结构形变影响,准确测量校准力,提高校准力加载精度。

High Precision Force Calibration System for Rotor Balance Based on Micro-deformation Measurement

In the in-situ calibration of rotor balance, the accurate loading of calibration force is an important factor to improve the calibration accuracy. The structural deformation of the calibration device will cause errors in the loading of the calibration force and affect the calibration accuracy. In order to solve this problem, a force calibration system for rotor balance is designed. The system uses laser triangulation method to measure the micro-displacement, and calculates the displacement of force loading point by measuring the change of spatial position of cubic target. A mathematical model is established to analyze the influence of structural deformation on the loading of calibration force and to measure the calibration force. Experiments show that the system can eliminate the influence of structural deformation, measure the calibration force accurately and improve the loading accuracy of the calibration force.