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5.0.弹体运动去耦 5.1.弹体运动去耦理论 4.3.7.4节讨论了早期的扫描系统。图42和43是相位测量和弹体运动相减过程的方块图。这些系统用弹体安装速率陀螺在偏航和俯仰平面内测量弹体运动,相减过程包括视在的弹体速度和目标速度之间的差。图42表示来自接收机的扫描信号频率正比于相干仪增益2πd/λ、视在的速度β和cosβ。弹体陀螺,通过一个适当的增益,频率调制振荡器使频率改变,作为弹体运动绕偏航和俯仰轴的函数,其实质与由接收机被干涉仪测得的视在目标速度收到的扫描频率的改变是相同的。在图42的方框图中,如果增益正确,真实的LOS视线速率比例于中心在F_0的鉴频器测得的频率F的变化。这一系统的一系列问题无能确定和维持鉴频器
5.0. Decoupling of projectile motions 5.1. Decoupling of projectile motions Section 4.3.7.4 discusses early scanning systems. Figures 42 and 43 are block diagrams of phase measurement and projectile motion subtraction. These systems measure projectile motion in the yaw and pitch planes with a projectile-mounted rate gyro that subtracts the apparent apparent projectile velocity from the target velocity. Figure 42 shows that the frequency of the sweep signal from the receiver is proportional to the coherence gain 2πd / λ, apparent velocity β and cosβ. The body gyroscope, with a suitable gain, frequency-modulated oscillator, changes the frequency as a function of the projectile motion around the yaw and pitch axes, in essence, as received by the apparent target velocity measured by the receiver by the interferometer The change in scan frequency is the same. In the block diagram of Figure 42, if the gain is correct, the true LOS line rate is proportional to the change in frequency F measured at a frequency discriminator centered at F_0. A series of problems of this system can not confirm and maintain the frequency discriminator