Analysis on Comparison of Permutation Entropy With Correlation Dimension for Abnormality Detection of A Rolling Bearing
Permutation entropy and fractal theory are new methods which are used to study irregularity and nonlinearity of a complex system in nature.Principle of Permutation Entropy (PE) and Correlation Dimension (CD) is introduced in this paper firstly,their differences in describing the complexity of vibration signal were analyzed and the selection methods of algorithm parameters were put forward,then taking the whole life vibration data of a bearing as an example,PE and CD algorithm were applied to detect abnormal characteristics respectively,and their difference on abnormal detection are compared with each other.It is concluded that the result of two detection methods is basically coincident,but PE has advantages in computational efficiency,which is much more suitable for online monitoring and will play an important role in preventive maintenance of mechanical equipments.
permutation entropy correlation dimension abnormality detection
Fuzhou Feng Guoqiang Rao Pengcheng Jiang Qingxu Min
Department of Mechanical Engineering Armored Force Engineering Acadamy Beijing,China
国际会议
成都
英文
766-770
2012-06-15（万方平台首次上网日期，不代表论文的发表时间）