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作 者:朱永亮[1] 吴志辉 黄炼 ZHU Yongliang;WU Zhihui;HUANG Lian(Nanjing Research Institute of Electronics Technology,Nanjing Jiangsu 210039,China)
出 处:《现代雷达》2025年第2期110-116,共7页Modern Radar
摘 要:星载合成孔径雷达发射脉冲时,供电母线的电流随着发射脉冲的频率和脉宽而波动,不同频率、不同脉宽条件下电流波动的峰值差异很大。当雷达发射脉冲的频率与供电系统输入端的谐振频率接近时,母线电流将出现谐振放大,谐振波动的幅值将大大超过正常雷达发射时的峰值电流,这给卫星供电系统带来了不利的影响。针对母线电流谐振波动的现象,文中分析了电流谐振波动产生的原理,并提出一种电压和电流双控制环路的抑制方法。该方法在稳压控制的基础上,通过对电流幅值的稳定控制来抑制供电母线电流谐振的幅值,使供电母线电流在任何工况下的波动均保持在最小值以内。仿真及实际电路的验证表明该方法能有效降低母线电流谐振波动的幅值,可用于星载雷达天线系统中。When the spaceborne synthetic aperture radar emits pulses,the current of the power supply bus fluctuates with the frequency and pulse width of the emitted pulses,and the peak values of the current fluctuation vary greatly under different frequencies and pulse width conditions.When the frequency of the radar emitting pulse is close to the resonance frequency of the power supply system input terminal,the bus current will increase because of the resonance,and the amplitude of the resonance fluctuation will greatly exceed the peak current under the normal condition,which will have adverse effects on the satellite power supply system.Aiming at the phenomenon of bus current resonance fluctuation,the principle of current resonance fluctuation is analyzed in this paper,and a suppression method of voltage and current dual control loops is proposed.On the basis of voltage regulation control,the proposed method suppresses the amplitude of current resonance in the power supply bus by stabilizing the control of current amplitude,achieving the effect of minimizing the fluctuation of power supply bus current under any operating conditions.Through simulation and experimental verification,it is shown that the proposed method can effectively reduce the amplitude of bus current resonance fluctuation and can be used in spaceborne radar antenna systems.
关 键 词:合成孔径雷达 卫星电源 供电母线 电流谐振波动 环路控制
分 类 号:V442[航空宇航科学与技术—飞行器设计]
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