某火星探测器对器载磁强计磁干扰的控制与实现

Magnetic interference mitigation and implementation for the onboard magnetometer of a Mars probe

  • 摘要: 针对某火星探测器上磁强计面临的磁干扰问题,文章提出一种磁性综合控制方案。该方案摒弃了传统的独立伸杆方式,而是利用太阳电池阵展开结构设计延展式支架,使磁强计远离探测器本体。在明确磁性控制分类以及各子系统和主要磁干扰源部件的磁矩分配指标的基础上,通过优化磁强计传感器布局、选择无磁或低磁材料和元器件、优化单部件结构布局和配置、控制磁滞效应和涡流效应,以及采用合理布线技术等措施,有效降低了探测器主要部件的磁性。试验结果表明,探测器本体和太阳电池阵对器载磁强计的干扰影响控制在1 nT左右,满足火星探测器磁场测量精度指标要求。该磁性控制方案可为同类航天器的磁性设计和控制提供参考。

     

    Abstract: To mitigate magnetic interference affecting the onboard magnetometer of a Mars probe, an integrated magnetic cleanliness strategy was developed and validated. The strategy incorporated an extended support bracket into the solar array deployment mechanism, replacing traditional deployable booms, to maximize the magnetometer’s separation from spacecraft-generated interference fields. Magnetic dipole moment budgets were specified for each subsystem and major interference source. The sensor layout was optimized; low- and non-magnetic materials were employed; and component structures and wiring were refined to suppress hysteresis and eddy current effects. As a result, the magnetic influence of key components was significantly reduced. Test results showed that the magnetic field at the magnetometer location remained within approximately 1 nT, meeting the measurement accuracy requirements for Martian magnetic fields. This magnetic cleanliness approach serves as a practical reference for the magnetic design of future deep space missions.

     

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