Oscar Malinowski, M.Sc. is currently a research associate at the Chair of Machine Tools at the Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University in Germany. He started his scientific career with a bachelor’s degree in mechanical engineering, followed by a master’s degree in aerospace engineering from the RWTH Aachen University. He joined WZL as a research engineer in 2019. Since then, he focused on investigation and design of highspeed rolling bearings and spindle bearing systems. Furthermore, his research includes optimization methods for balancing of motor spindles to improve structural dynamic behavior of machine tools.
Aircraft engines can be made more efficient by integrating planetary gears. In such an application, the planetary gears experience very high load cycles under fully reversed bending loads. Pulsator test rigs, which nowadays offer the possibility to perform UHCF investigations, can only be used for purely pulsating loading of gears. Therefore, for the investigation of the UHCF tooth root load carrying capacity under fully reversed bending load, a back-to-back test rig is required. Back-to-back test rigs usually have speeds of n = 3,000 rpm, which makes investigations in the UHCF range take a very long time. Therefore, a high-speed back-to-back test rig was developed.
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