传感技术学报2025，Vol.38Issue(3)：387-393,7.DOI:10.3969/j.issn.1004-1699.2025.03.002
磁场不均匀性对磁流体角速度传感器输出特性影响的研究
Analysis of the Influence of Non-Uniform Magnetic Field on the Output of Magnetohydrodynamics(MHD)Rate Sensor
摘要
Abstract
The magnetic induction intensity determines the scale factor of the MHD rate sensor,and the time-domain and frequency-domain characteristics of sensors are affected by non-uniform magnetic induction intensity in fluid channels.In order to analyze the in-homogeneity of magnetic circuit,MHD module is used to couple the flow field and the non-uniform magnetic field,and the goodness of fit of the vibration curve of the output potential is taken as the evaluation index.The results of simulation show that the circumferential non-uniform magnetic field has the greatest impact on the sensor output.Simulation is carried out on the circumferential non-uniform magnetic field,results show that fluctuation degress of output potential for uniform magnetic field and circumferential non-uniform mag-netic field are 0.61%and 1.09%,respectively,and the output stability is worse under circumferential non-uniform magnetic field than that under uniform magnetic fields.At the same time,the goodness of fit is worse.A circumferential non-uniform magnetic field com-posed of four fan-shaped magnets and a magnetic circuit composed of a whole magnet are designed for comparative experiments.The ex-periment indicates that the fluctuation degrees of the output signal are bigger and the goodness of fit is worse under the circumferential non-uniform magnetic field than those under the uniform magnetic field within the frequency range of 0.1 Hz-80 Hz,which affects the output stability and signal authenticity of the sensor.The experimental and simulation conclusions are consistent.关键词
磁流体动力学/磁场不均匀性/拟合优度/波动度Key words
magnetohydrodynamic/non-uniformity of magnetic field/goodness of fit/fluctuation degree分类
机械制造引用本文复制引用
纪越,陈浩,李醒飞..磁场不均匀性对磁流体角速度传感器输出特性影响的研究[J].传感技术学报,2025,38(3):387-393,7.基金项目
国家自然科学基金面上项目(62173245) （62173245）
国家自然科学基金重点项目(61733012) （61733012）
