角位移传感器定转子间隙设计与验证  

Design and Verification of Air Gap Between Stator and Rotor of RVDT

作　　者：徐华[1] 郑嘉铭 韩超 XU Hua;ZHENG Jiaming;HAN Chao(Nanjing Electromechanical Hydraulic Engineering Research Center,Nanjing 211106,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]南京机电液压工程研究中心,南京211106 [2]西安交通大学电气工程学院,西安710049

出　　处：《南京航空航天大学学报》2021年第4期598-604,共7页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：角位移传感器(Rotary variable differential transformer,RVDT)采用非接触设计,具有灵敏度高、线性好、结构紧凑等优点,在航空领域自动控制系统中应用广泛。在其结构参数中,定转子间隙是提高性能和可靠性的重要设计因素。本文针对定转子间隙进行研究,并以一款典型产品开展了优化设计。通过理论仿真分析和物理实验测试两个角度研究了间隙对角位移传感器的线性度和梯度这两个重要静态指标的影响规律,从而获得了在一定的结构尺寸下,传感器输出梯度和线性度随间隙大小的变化规律以及间隙的合理选取范围等重要结论。本文研究不仅可为产品结构设计参数的选取提供有力的支撑,而且在工程实现中,还可对实际产品结构尺寸进行修正,提高产品的合格率。此外,相关研究方法和获得的结论还可以推广应用到多余度角位移传感器的研制中,为此类产品的快速研发提供借鉴。Rotary variable differential transformer(RVDT)adopts non-contract design,has the advantages of high sensitivity,good linearity and compact structure,and is widely used in automatic control system in the aviation field.The air gap between stator and rotor is one of the important structural parameters to improve its performance and reliability.This paper studies the air gap between stator and rotor and develops an optimized design with a typical product.Through theoretical simulation analysis and physical experimental tests,the influence of the air gap on the linearity and gradient of RVDT,the two important static indicators,is studied.In this way,under a certain structure size,the influence of the air gap size on the RVDT output gradient and linearity and the reasonable selection range of the air gap are obtained.The proposed study can not only provide strong support for the selection of product structure design parameters,but also revise the actual product structure size during engineering realization to improve the product qualification rate.In addition,the relevant research methods and conclusions obtained can also be promoted and applied to the development of redundant RVDT,providing a reference for the rapid development of such products.

关 键 词：角位移传感器 定子铁芯 转子铁芯 间隙设计 线性度 梯度 

分 类 号：V241.6[航空宇航科学与技术—飞行器设计]