频率解算是科氏流量计气体信号处理的首要任务。针对实际应用中气体信号信噪比低、频率波动大的特点，提出了一种基于SVD和改进自适应算法的科氏流量计气体信号频率解算方法：首先利用SVD对气体信号降噪并重构原信号，然后应用改进自适应算法处理重构信号，解算出频率。仿真及实验结果表明，本方法可以获得更快的收敛速度和更高的频率跟踪精度。%Frequency calculation is the primary task of the gas coriolis flowmeter signal processing. According to the low signal noise ratio,frequency fluctuation of gas signal in the practical application,a new method based on the improved Adaptive Linear Enhance ( ALE ) frequency calculation is presented:In this method we first used the singular value decomposition( SVD) to denoising and reconstructing the original signal of gas signal,then applied the improved adaptive algorithm for signal reconstruction,and calculated the frequency. The simulation and experimental results show that,this method can obtain a faster convergence speed and higher frequency tracking accuracy.
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