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本文主要叙述单脉冲跟踪雷达多卜勒测速系统的闭环跟踪带宽及其实验测定法,并结合某雷达给出带宽计算结果和测试结果,结果表明二者十分接近。多卜勒测速系统的核心是细谱线二阶跟踪环。环路跟踪时,鉴频器特性可以线性化处理,环路等效为线性连续系统,这样对环路带宽的分析就十分简便。文中给出了环路的等效伺服框图、传递函数及闭环带宽的表达式,在此基础上提供了一种闭环带宽的实验测试方法,即环路输入一个最大频偏和调制频率已知的简谐源调频信号,在不同调制
This paper mainly describes the closed-loop tracking bandwidth of the Doppler velocimetry system with single-pulse tracking radar and its experimental measurement. The calculation results and test results of the bandwidth are given in combination with a radar. The results show that the two are close to each other. The heart of the Doppler speed system is a fine line second-order tracking loop. Loop tracking, frequency discriminator characteristics can be linearized, the loop is equivalent to a linear continuous system, so the loop bandwidth analysis is very simple. In this paper, the equivalent servo block diagram of the loop, transfer function and the expression of closed-loop bandwidth are given. Based on this, an experimental test method of closed-loop bandwidth is provided, that is, the loop inputs a maximum frequency offset and the modulation frequency is known Harmonic source FM signal, in different modulation