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兵工学报 ›› 2023, Vol. 44 ›› Issue (2): 428-436.doi: 10.12382/bgxb.2021.0563

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基于改进SOGI-FLL的旋转弹舵机滞后测试方法

张鑫1,*(), 林凡2, 沈鑫杰2   

  1. 1 北京理工大学 机械与车辆学院, 北京 100081
    2 北京理工大学 宇航学院, 北京 100081
  • 收稿日期:2021-08-24 上线日期:2022-06-13
  • 通讯作者:

A Lag Angle Test Method for Actuators of Spinning Missiles Based on Improved SOGI-FLL

ZHANG Xin1,*(), LIN Fan2, SHEN Xinjie2   

  1. 1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
    2 School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China
  • Received:2021-08-24 Online:2022-06-13

摘要:

针对旋转弹舵机滞后测试中存在的噪声及常值偏移问题,将2阶广义积分锁频环(SOGI-FLL)改进后应用于测试数据处理,以精确地得到舵机滞后角。舵机滞后角测试问题的本质是存在噪声及常值偏移下的正弦信号相位提取问题。通过在常规SOGI-FLL中引入常值偏移补偿回路,使其具有常值偏移扰动抑制能力。改进SOGI-FLL表现为带通滤波器特性,可实现正弦信号基波频率处无滞后无衰减的滤波,有效消除噪声及常值偏移的影响,其输出的正交信号供给带有PI环节的锁相环(PLL)进行相角估计。仿真和实验结果表明,在测试信号存在噪声及常值偏移时,相比于传统FFT方法和相关分析法,改进SOGI-FLL能够有效地提高滞后角处理精度。

关键词: 旋转弹舵机, 2阶广义积分锁频环, 带有PI环节的锁相环, 滞后角

Abstract:

To address the problems of noise and DC offset in testing the lag angle of actuators of spinning missiles, an improved second-order generalized integrator frequency-locked loop (SOGI-FLL) algorithm is applied for processing test data and accurately calculating the lag angle. The essence of the test is to extract the phase of sinusoidal signals under the influence of noise and DC offset. By introducing the DC offset compensation loop into conventional SOGI-FLL, the algorithm is capable of suppressing DC offset disturbances. The improved SOGI-FLL shows the characteristics of a band-pass filter, which can realize filtering without lag and attenuation at the fundamental frequency of sinusoidal signal, effectively eliminating the influence of noise and DC offset. In the meantime, the output quadrature signals are supplied to phase locked loop (PLL) with PI controller for phase angle estimation. The simulation and experimental results show that the improved SOGI-FLL can effectively improve the lag angle processing accuracy compared with the traditional FFT method and correlation analysis method when the test signal is affected by noise and DC offset.

Key words: actuator of spinning missile, second-order generalized integrator frequency-locked loops, phase-locked loop with PI controller, lag angle

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