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一、引言锁相理论表明,跟踪相位加速度变化信号的理想环路是三阶锁相环路。但是就线性性能而言,三阶环是有条件稳定的,因而突出的问题是如何适当地选择环路参数,既满足稳定性要求,又满足环路最佳化性能要求。A.C.Tausworthe提出的三阶环理论,比较全面与系统地解决了这一难题,因而使三阶环在空间技术中跟踪多普勒信号或测量仪器中跟踪扫频信号等场合获得日益广泛的应用。
I. INTRODUCTION Phase-locked theory shows that the ideal loop to track the phase acceleration change signal is a third-order phase-locked loop. However, the third-order loop is conditionally stable in terms of linearity. Therefore, the outstanding issue is how to properly select the loop parameters to meet both the stability requirement and the loop optimization performance requirement. The third-order loop theory proposed by A.C.Tausworthe, a more comprehensive and systematic solution to this problem, so that the third-order loop in space technology to track Doppler signals or measuring instruments, such as tracking the sweep signal is increasingly widely used.