MEchanics GAthering –MEGA- Seminar: A two-probe method for rotor shape identification and error filtering
Event details
| Date | 02.05.2024 |
| Hour | 16:15 › 17:15 |
| Speaker | Phillip Huwiler (LAMD, EPFL) |
| Location | Online |
| Category | Conferences - Seminars |
| Event Language | English |
Abstract: Time-domain radial displacement measurements play a crucial role in evaluating the stability and dynamic effects in rotating machinery, as well as validating numerical models in research settings. However, if the rotor's shape deviates from a perfect cylinder about the axis of rotation, the displacement signal will be polluted with periodic error. To address this, we present a new method for identifying and filtering rotor shape error from a set of unbalance signals using only two displacement probes and a position-consistent trigger. The method introduces regularized fitting to describe a smooth rotor speed evolution of a chosen parameter used in the formulation of unbalance orbits. This fitting is embedded in a larger system of equations calculating errors at a multitude of rotor speeds between the measured total signal and parametrized orbit equations, both in absolute terms and their respective sensitivity to rotor speed. By way of a case study, we show that the rotor shape error correction factor can be extracted after minimizing the error function. This correction factor can be used to filter the error caused by shape imperfections for arbitrary measurements made with the same setup.
Bio: Phillip Huwiler is a Ph.D. candidate at the Laboratory for Applied Mechanical Design (LAMD), EPFL. He holds B.Sc. and M.Sc. degrees from the Georgia Institute of Technology and several years of experience in the automotive industry. His current research focuses on experimental and model-based investigations of rotor systems supported by gas-lubricated bearings under dynamic loads. The applications of his work include high-speed gas-bearing supported turbomachines designed for heat pumps, fuel cells, and waste heat recovery systems. The outcomes of his research have particular relevance for potential advancements in the transportation sector, where designing for external vibration is crucial.
Bio: Phillip Huwiler is a Ph.D. candidate at the Laboratory for Applied Mechanical Design (LAMD), EPFL. He holds B.Sc. and M.Sc. degrees from the Georgia Institute of Technology and several years of experience in the automotive industry. His current research focuses on experimental and model-based investigations of rotor systems supported by gas-lubricated bearings under dynamic loads. The applications of his work include high-speed gas-bearing supported turbomachines designed for heat pumps, fuel cells, and waste heat recovery systems. The outcomes of his research have particular relevance for potential advancements in the transportation sector, where designing for external vibration is crucial.
Practical information
- General public
- Free
Organizer
- MEGA.Seminar Organizing Committee