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提出基于相对论的运动体电磁散射的精确数值计算方法。此方法包括时空变换、电磁场变换以及任意参考系的电动力学。电磁散射仿真在目标系进行,通过相对论变换得到雷达系的数值结果。通过匀速运动的例子计算多普勒效应,通过加速运动和圆周运动的例子计算加速度引起的相对论效应,通过旋转和振动的例子计算微多普勒效应。其中加速运动的例子中考虑非惯性系的影响,并与惯性情形做比较,表明加速度仍会对回波产生影响。算例结果表明此方法可精确模拟以任意方式运动的物体。
An accurate numerical calculation method of electromagnetic scattering of moving body based on the theory of relativity is proposed. This method includes spatio-temporal transformations, electromagnetic field transformations, and the electrokinetics of any frame of reference. The electromagnetic scattering simulation is carried out in the target system and the numerical results of the radar system are obtained through the relativistic transformation. The Doppler effect is calculated by an example of constant motion, the acceleration-induced relativistic effect is calculated by examples of accelerating and circular motions, and the micro-Doppler effect is calculated by the example of rotation and vibration. In the case of accelerating motion, the influence of non-inertial system is taken into account and compared with the inertial situation, indicating that the acceleration will still affect the echo. The example results show that this method can accurately simulate objects moving in any way.