智能球铰链优化设计与精度提升  

Optimized design and accuracy improvement of intelligent ball hinge

作　　者：胡鹏浩[1] 陈时毅 廖普 刘文文[1] 祝连庆[2] Hu Penghao;Chen Shiyi;Liao Pu;Liu Wenwen;Zhu Lianqing(The School of Instrumentation Science and Opto-electrical Engineering, tlefei University of Technology, Hefei 230009, China;The School of Instrumentation Science and Opto-electrical Engineering, Beijing Information Science and Technology University, Beijing 100192, China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院,合肥230009 [2]北京信息科技大学仪器科学与光电工程学院,北京100192

出　　处：《仪器仪表学报》2018年第3期132-140,共9页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51475133,51475132);北京市“光电测试技术”重点实验室开放项目(GDKF2016001)资助

摘　　要：针对所研发的智能球铰链测量分辨率及测量精度较低的问题,从永磁体选型、传感器匹配以及模型算法方面进行改进和优化。通过仿真分析和计算,确立了圆柱形永磁体的结构参数、重新设计了传感器水平放置与永磁体进行位置匹配的方案,更新了角度反解算法的函数初值选择方法,研制了新的智能球铰链样机和标定装置。测试数据表明,该样机测量范围、精度都有显著提高,在±10°范围内,单轴测量均方差为19＇;在±20°范围内,均方差为24＇。基于数据分析与诊断,已找出主要误差源,找到了进一步提高测量精度的途径。In order to improve measuring resolution and accuracy in the developed intelligent ball hinge（IBH）,some issues including design of the permanent magnet（PM）,matching of sensors and algorithm optimization are studied in this work.A new matching scheme of cylindrical permanent magnet and horizontal placed sensor arrays is determined by simulation calculation and analysis.The selection method of initial value in the algorithm for solving the angle is updated.The intelligent ball hinge prototype and calibration device are newly developed.The experimental results indicate that the measuring accuracy is significantly improved as well as the enlargement of measurement range,in the range of ± 10°,the standard deviation of single axis is about 19＇,and the standard deviation is about 24＇ in± 20°.The main error source in the IBH is identified from the experiment data,and a new method to further improve performance of the IBH is obtained.

关 键 词：球铰链 永磁体 传感器 模型算法 精度分析 

分 类 号：TH712[机械工程—测试计量技术及仪器]