Fifth, we derive the mathematical equation of the instantaneous DOA, when the target moving in line and in the same plane as ULA.

第五，根据目标运动轨迹，通过数学推导得出目标在线阵平面内做直线运动时的瞬时波达方向表达式。

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A mathematical model of the output signal of focal plane array was established; a compensating algorithm utilizing reference source was derived and simulating programs were designed.

建立了红外焦平面阵列输出信号的数学模型，推导出使用参考辐射源的补偿算法并设计了仿真程序。

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According to the essence of Pilot Induced Oscillation (PIO) and the theory of Closed-loop control, the mathematical model of Pilot-Plane system is set up.

本文根据驾驶员诱发振荡的实质，从闭环控制理论出发，提出了人-机系统数学模型，并在时域内进行了计算。

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