双稳态电磁阀控制方式和动态性能的研究

Study on Control Method and Dynamic Performance of the Bistable Solenoid Valve

航天器中大量采用了自动化程度较高的双稳态电磁阀,其控制方式和动态性能是设计中的重要环节。根据双稳态电磁阀的工作特点,建立电、磁、机系统的机电模型,并对等效电路模型进行了改进。根据多场耦合的特点,考虑到磁性材料的非线性特性及磁路的漏磁效应,选择有限元法进行仿真计算,并建立了电磁阀的二维有限元模型。电磁阀动态仿真计算数据与试验结果相一致,达到了定量判定出电磁阀所受电磁力大小以及开关放电电流的特征曲线的目的。多耦合场条件下运用有限元法对控制方式进行优化可以提高设计工作的费效比,且能够达到较高的精度,是进行电磁阀优化设计的有效方法。

The spacecraft uses bistable solenoid valve with a higher degree of automation, and control method and dynamic peorformanee was an important link in the design of bistable solenoid valve. According to the working characteristics of the solenoid valve, established the electromechanieal model of the electric, magnetic, machine system, and improved the equivalent circuit model, described the working principle process and energy conversion of the solenoid valve in more accurate. According to the chacacteristies of multi field coupling, considered the nonlinear properties of magnetic materials and leakage effect of magnetic circuit, choosingfinite element method for the simulation calculation, and a two-dimensional finite element model was established The dynamic simulation data was eonsistent with the experimental results of solenoid valve, achieved the purpose of quantitatively analyzing the electromagnetic force size, and got characteristic curve of the switch discharge eurrent. Usingfinite element method to optimize control method could improve the cost-effectiveness in multi field coupling conditions, and could achieve high precision, so it was an effective method for designing optimization of solenoid valve.