摘要
为提升军用航空飞机中燃油流量传感器的工作性能,以输出电压信号幅值和电压曲线平滑度为评判标准,结合理论与仿真工具研究最优的传感器设计方案。从麦克斯韦方程组出发,根据永磁铁静磁理论和法拉第电磁感应定律,阐述传感器的实现原理并初步得到各参数值与评判标准的对应关系。再以理论指导仿真,使用有限元工具对不同参数条件下线圈输出电压曲线的特征进行仿真分析,得到结论如下:对于同为10组的磁铁和线圈组合,减小磁铁与线圈距离、增大磁铁剩磁强度、加快叶轮转速均可使感应电压急剧增强,而铁芯相对磁导率的变化在超过一定范围后对电压的影响逐渐减小。最后由仿真与实验对比其他的磁铁与线圈组合方式可知,设计传感器时最优方案为线圈与磁铁组数相同且应适当减少。研究结果对于提升机载燃油流量传感器的测量精度和测量可靠性具有一定的指导意义。
In order to improve the performance of fuel flow sensor in military aircraft,taking the amplitude of output voltage signal and the smoothness of voltage curve as evaluation criteria,the optimal sensor design scheme is studied by combining theory and simulation tools.Starting from Maxwell’s equations,according to the magnetostatic theory of permanent magnet and Faraday’s law of electromagnetic induction,the realization principle of sensor is expounded and the corresponding relation between each parameter value and the evaluation standard are preliminarily obtained.Under the guidance of theory the characteristics of the output voltage curve of the coil under different parameters are simulated and analyzed by using the finite element tool.The simulation results are as follows:for the same 10 groups of magnet and coil combination,the induction voltage can be sharply enhanced by reducing the distance between magnet and coil,increasing the magnetic remanence strength of magnet,and accelerating the impeller speed,while the influence of the change of the iron core relative permeability on the voltage decreases gradually after exceeding a certain range.By comparing other combinations of magnets and coils with simulation and experiment methods,it can be seen that the optimal scheme for sensor design is to have the number of coils and magnets and reduce them appropriately.The research results have certain significance for improving the measurement accuracy and reliability of airborne fuel flow sensor.
作者
徐伟
林波
刘兆强
江文波
张思宇
胡敏
XU Wei;LIN Bo;LIU Zhao-qiang;JIANG Wen-bo;ZHANG Si-yu;HU Min(AVIC Sichuan Fanhua Aviation Instrument&Electric Co.,Ltd.,Chengdu 610500,China)
出处
《测控技术》
2021年第11期150-156,共7页
Measurement & Control Technology
关键词
燃油流量测量
传感器设计
磁电转换原理
有限元仿真
fuel flow measurement
sensor design
magnetoelectricity conversion
finite element simulation
