The Application Of The Digital Filtering Algorithms In The Signal Processing System Of The Micro-Displacement Sensor

In the Active Optical System, the precise measurement of the micro-displacement is the important evidence for the adjustment of the segmented mirrors and has great influence upon the full playing of the system's optical performance. In this paper, both the median and adaptive filters are designed and simulated based on MatLab platform to remove the noises in the received signal of the micro-displacement sensor which has the features of low frequency, small amplitude and being susceptible to interference. The algorithms are also verified in the real micro-displacement measuring system. The results show that both of these two algorithms are effective and contribute to improve the system's performance.