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Active magnetic bearings used as exciters for rolling element bearing outer race defect diagnosis |
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| Affiliation: | 1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Rotating Machinery and Control Laboratory (ROMAC), University of Virginia, Charlottesville, VA 22904-4743, USA;1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;2. Laboratory of Robotic Systems, Ecole Polytechnique Federale Lausanne (EPFL), Lausanne, 1015, Switzerland;1. Institute of Energy Systems, Faculty of Mechanical Engineering, Technische Universität München, Boltzmannstra ße 15, 85748 Garching, Germany;2. The Bavarian Center for Applied Energy Research (ZAE Bayern), Division 1: Technology for Energy Systems and Renewable Energy, Walther-Meissner-Str. 6, 85748 Garching, Germany;1. Mechanical Engineering Department, Tarbiat Modares University, P.O. Box 14115-111, Tehran, Islamic Republic of Iran;2. Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Dr. NW, Calgary, Alberta T2N 1N4, Canada |
| 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. |
| Keywords: | Active magnetic bearings Rolling element bearings Outer race Defect diagnosis |
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