高动态下惯性加速度辅助三阶锁相环性能分析

Performance Analysis of the Third Order PLL Aided by Inertial Acceleration under High Dynamic Conditions

关键词:  高动态  加速度  锁相环  惯性辅助

Key words:  High dynamic  Acceleration  Phase locked loop  Inertial assistance

摘要:

针对高阶跟踪环路稳定性比低阶环路差，大带宽带来测量误差大的问题。研究在高动态环境下，惯导加速度信息辅助卫星接收机三阶载波锁相环跟踪算法，以及不同环路参数下跟踪环路的性能。对载体高动态场景、加速度信息延迟进行建模，并对算法进行了数学仿真。仿真分析结果表明，在加速度信息辅助下，即使压缩载波跟踪环路等效噪声带宽到3Hz，在高达1200g/s的加速度动态下，环路跟踪同样稳定可靠。

Abstract:

This paper presents the arithmetic of 3rd order carrier PLL assisted by acceleration information from INS(Inertial Navigation System),also introduces the performance of tracking loop with different parameter of loop. The model for high dynamic condition and accelerates information delay are built,based on the model,the arithmetic is simulated. The result indicates that,with accelerate information auxiliary,tracking loop is stable under 1200g/s condition even compressing the noise bandwidth of carrier tracking loop down to 3Hz.