激光多普勒测量自适应陷波器去噪研究

Research on Adaptive Notch Filter of Laser Doppler measurement

针对激光多普勒测量中声光调制、电光调制等引入的多频率噪音干扰 ,提出一种兼顾收敛性、鲁棒稳定性的自适应陷波器去噪方法 .并在时域内研究自适应陷波器算法及其构造 ,最后给出了仿真实例 .该算法不需具体的激光多普勒测试系统模型 ,方法简单 ,易于实现 ,试验结果表明了该方法的有效性 .

The algorithm and principle of the adaptive filter as well as its application as a noise cancellation wave trap are analyzed in face of the noise disturbance from acoustic optic modulation and electric optic modulation. A reasonable structure of the wave trap is proposed in time domain and the result of its computer simulation is given. Because all the procedure can be done without the detailed model about the LDV system, it is rather simple and practical. Experiment results show the effectiveness of the method proposed.