对一种冷氦增压电磁阀构建了阀芯运动控制方程及AMESim模型,通过线性稳定性分析求解电磁阀的压力-流量临界稳定曲线,并开展主阀芯的扰动响应特性分析。计算结果表明,流量较小时阀芯平衡状态不稳定,受到微小扰动就会形成自激振动;随着流量增大,平衡状态逐渐趋于稳定;同一工作压力下,介质为冷氦时电磁阀的稳定性优于常温氦气和空气;增加电磁阀与孔板间的连接管路长度,能够提高阀门工作稳定性。 The valve movement control equation and AMESim model are constructed for a cold helium booster solenoid valve. The pressure-flow critical stability curve of the solenoid valve is solved by linear stability analysis and the disturbance response characteristics of the main valve spool are analyzed. The calculation results show that when the flow rate is small, the equilibrium state of the valve core is unstable and the self-excited vibration will be formed when it is slightly disturbed. As the flow rate increases, the equilibrium state tends to be stable gradually; under the same working pressure, Stability is better than the ambient temperature helium and air; increase the length of the connecting pipe between the solenoid valve and the orifice plate, can improve the stability of the valve work.