光纤光栅六维测力仪耦合误差原位校准  

In-Place Calibration for Coupling Error of Six-axis Dynamometer Based on Fiber Bragg Grating

作　　者：陈发银 席勇辉[1] CHEN Fayin;XI Yonghui(Kunming Shipborne Equipment Research and Test Center,Kunming 650000,China)

机构地区：[1]昆明船舶设备研究试验中心,昆明650000

出　　处：《宇航计测技术》2024年第4期11-16,共6页Journal of Astronautic Metrology and Measurement

摘　　要：不同于应变型测力仪,光纤光栅(Fiber Bragg Grating, FBG)六维测力仪采用结构型测力原理及光无源器件,耦合误差是其主要指标参数之一,且由于其应用场景限制,通常进行原位校准。文中分析了FBG六维测力仪的传感结构及原理,根据耦合误差模型,设计了无标准力源的原位校准装置,提出基于机械臂的耦合误差原位校准方法,实现了校准操作流程的简化和不确定度来源的控制。通过结合实际算例,分析了校准结果不确定度,验证了该方法的有效性。Different from strain gauge dynamometers,six-axis dynamometer based on fiber Bragg grating(FBG)adopts the structural force measurement principle,and one of its main performance parameters is the coupling error.Due to the limitation of its application scenario,in-place calibration is usually performed.The sensing structure and principle of the FBG six-axis dynamometer are analyzed,and an in-place calibration device without a standard force source is proposed according to the coupling error model.An in-place calibration method based on a robot arm for coupling error is also established,in which the calibration process is simplified and the source of uncertainty is reduced.The uncertainty of calibration results is analyzed with a practical example,and the effectiveness of the method is verified.

关 键 词：光纤光栅 六维力 耦合误差 原位校准 

分 类 号：TB938.1[一般工业技术—计量学] V241[机械工程—测试计量技术及仪器]