DETECTION OF EARLY RUB-IMPACT IN ROTORS VIA HIGHER-ORDER TIME-FREQUENCY ENTROPY  

作　　者：ChenZhongsheng YangYongmin HuZheng ShenGuoji 

机构地区：[1]CollegeofMechatronicsEngineenngandAutomation,NationalUniversityofDefenseTechnology,Changsha410073,China

出　　处：《Chinese Journal of Mechanical Engineering》2004年第4期614-617,共4页中国机械工程学报（英文版）

基　　金：ThisprojectissupportedbyNationalDefenseMaintenanceEngineeringFoundationofChina(No.413270303).

摘　　要：Due to the calculation problem of classical methods (such as Lyapunovexponent) for chaotic behavior, a new method of identifying nonlinear dynamics with higher-ordertime-frequency entropy (HOTFE) based on time-frequency analysis and information theorem is proposed.Firstly, the meaning of HOTFE is defined, and then its validity is testified by numericalsimulation. In the end vibration data from rotors are analyzed by HOTFE. The results demonstratethat it can indeed identify the early rub-impact chaotic behavior in rotors and also is simpler tocalculate than previous methods.Due to the calculation problem of classical methods (such as Lyapunovexponent) for chaotic behavior, a new method of identifying nonlinear dynamics with higher-ordertime-frequency entropy (HOTFE) based on time-frequency analysis and information theorem is proposed.Firstly, the meaning of HOTFE is defined, and then its validity is testified by numericalsimulation. In the end vibration data from rotors are analyzed by HOTFE. The results demonstratethat it can indeed identify the early rub-impact chaotic behavior in rotors and also is simpler tocalculate than previous methods.

关 键 词：Higher-order time-frequeney entropy(HOTFE) Chaotic behavior Early faults RUB-IMPACT 

分 类 号：O415.5[理学—理论物理] O414.1[理学—物理]