title: Active magnetic bearings used as exciters for rolling element bearing outer race defect diagnosis.
abstract: The active health monitoring of rotordynamic systems in the presence of bearing outer race defect is considered in this paper. The shaft is assumed to be supported by conventional mechanical bearings and an active magnetic bearing (AMB) is used in the mid of the shaft location as an exciter to apply electromagnetic force to the system. We investigate a nonlinear bearing-pedestal system model with the outer race defect under the electromagnetic force. The nonlinear differential equations are integrated using the fourth-order Runge-Kutta algorithm. The simulation and experimental results show that the characteristic signal of outer race incipient defect is significantly amplified under the electromagnetic force through the AMBs, which is helpful to improve the diagnosis accuracy of rolling element bearing׳s incipient outer race defect.
authors.affiliation: College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. Electronic address: ypxu@nuaa.edu.cn.
authors.forename: Yuanping
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Rotating Machinery and Control Laboratory (ROMAC), University of Virginia, Charlottesville, VA 22904-4743, USA. Electronic address: ld4vv@virginia.edu.
authors.forename: Long
authors.initials: L
authors.lastname: Di
authors.affiliation: College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. Electronic address: zhj@nuaa.edu.cn.
authors.forename: Jin
authors.initials: J
authors.lastname: Zhou
authors.affiliation: College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. Electronic address: jinchaowu@nuaa.edu.cn.
authors.forename: Chaowu
authors.initials: C
authors.lastname: Jin
authors.affiliation: College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. Electronic address: guo_qintao@nuaa.edu.cn.
authors.forename: Qintao
authors.initials: Q
authors.lastname: Guo
keywords: Active magnetic bearings; Defect diagnosis; Outer race; Rolling element bearings