三维编织复合材料健康检测的FBG传感器信号的阈值去噪优化

FBG Sensor Signal Detection of 3D Braided Composites Threshold Denoising Optimization

传统小波变换算法在三维编织复合材料健康检测的FBG传感器信号中无法对噪声进行很好的消除,本文针对这一问题,提出了基于阈值优化的小波变换算法,首先采用采用折衷阈值法构建小波系数估计器,然后利用构建的小波系数估计器对偏差进行优化,从而达到更好的去噪效果。实例仿真试验结果表明,在对光谱仪测得的FBG反射谱的去噪中,本文提出的基于阈值优化的小波变换算法去噪效果更好。

The traditional wavelet transform algorithm in FBG sensor signal of 3D braided composites in health detection of the noise can not be eliminated well, aiming at this problem, the wavelet transform algorithm based on optimal threshold, first by the construction of wavelet coefficient estimator used to compromise threshold method, and then use the wavelet co-efficient estimator constructs the deviation is optimized, in order to achieve a better denoising effect. The simulation experi-ment results show that, in the spectrometer measured the FBG reflection spectrum denoising, the wavelet transform algo-rithm based on optimal threshold denoising effect is better.