摘要
以采集的160kA铝电解槽阳极的电流信号为基础,利用Yule-Walker方法的功率谱估计对其进行分析,提取不同槽况的频谱特征,并将分析结果与HHT(Hilbert-Huang transform)的边际谱分析结果进行对比。结果表明:基于Yule-Walker方法的功率谱估计分析结果能较好地区分正常糟、冷槽及阴极破损槽,并得到正常糟、冷槽及阴极破损槽功率谱曲线主谱峰的频率范围分别为0.003～0.018、0.023～0.027、0.027～0.031Hz;对于不同槽况下的阳极电流信号,HHT的边际谱的主谱峰与Yule-Walker方法的功率谱曲线的主谱峰位置一致,表明功率谱估计分析结果的可靠性。
Yule-Walker method was applied to analyzing the power spectrum of anode current signals collected from 160 kA aluminum reduction cells and to extracting the spectral characteristics in different operation states,and then the power spectrum was further compared with the marginal spectrum resulting from HHT（Hilbert-Huang transform）.The results show that the power spectrum based on Yule-Walker method is able to distinguish the normal cell,the cold cell and the cell with local failure of cathode surface,and their frequency ranges are recognized to be 0.003-0.018,0.023-0.027 and 0.027-0.031 Hz,respectively.For the anode current signals from different cell states,the main peak at the power spectrum curve has the same location as that at the marginal spectrum curve,showing the good reliability of Yule-Walker method for the power spectrum estimation of the anode current signals.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第5期999-1005,共7页
The Chinese Journal of Nonferrous Metals
