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甚低频(Very low frequency,VLF)拖曳天线力学特征和控制是飞机对潜通信系统进一步深入论证需要解决的关键问题之一,而对其稳态动力学研究是进行甚低频拖曳天线力学特征和控制研究的基础。通过对载机盘旋时甚低频天线运动状态及其受力进行分析,应用牛顿定律建立机载甚低频拖曳天线稳态动力学模型。运用打靶法对其稳态动力学模型进行求解,分析载机速度、倾斜角和天线末端锥袋质量对天线末端锥袋量纲一半径和天线垂直度的影响。仿真结果表明在阻力系数较小时,在一定的倾斜角和载机飞行速度范围内其垂直度和天线末端量纲一半径存在多值情况,会导致拖曳天线系统的不稳定;在一定的阻力系数下,减小飞机速度,增加载机的倾斜角,能够提高甚低频拖曳天线的垂直度;单一增加天线末端锥袋质量来提高垂直度是不可行的。
The mechanical characteristics and control of very low frequency (VLF) towed antennas are one of the key issues that need to be solved for the further research of submarine communication systems. However, the steady-state dynamics of VLF towed antennas is characterized by mechanical characteristics and control The basis of research. By analyzing the motion state and force of the very low frequency antenna when the carrier circled, the steady state dynamic model of airborne very low frequency towed antenna was established by Newton’s law. The steady-state dynamic model was solved by shooting method, and the influence of carrier speed, tilt angle and antenna cone weight on the dimension of the antenna cone and the verticality of antenna were analyzed. The simulation results show that the multi-value of the verticality and the radius of the antenna tip within a certain range of tilt angle and aircraft flight speed can lead to the instability of the towed antenna system when the drag coefficient is small. Under a certain drag coefficient , Reducing the speed of the aircraft and increasing the tilt angle of the carrier can improve the verticality of the very low frequency towing antenna; it is not feasible to increase the quality of the end cone of the antenna to increase the verticality.