Reducing rotor vibrations in active conical fluid film bearings with controllable gap

Reducing rotor vibrations in active conical fluid
film bearings with controllable gap

Despite the hydrodynamic lubrication is a self-controlled process, we designed control systems with the adaptive
PI and a DQN-agent based controllers to minimize the rotor
oscillations amplitude in a conical fluid film bearing. Design of the bearing allows its axial displacement and thus adjustment of its average clearance. The tests were performed using a simulation model in MATLAB software. The simulation model includes modules of a rigid shaft, a conical bearing, and a control system. The bearing module is based on numerical solution of the generalized Reynolds equation and its non-linear approximation with fully connected neural networks. The obtained results demonstrate that the both the adaptive PI controller and the DQN-based controller reduce the rotor vibrations even when imbalance in the system grows.

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Authors:

Yuri Kazakov (Orel State University (OSU), KazakYurii@yandex.ru)


Alexey Kornaev (Innopolis University, a.kornaev@innopolis.ru)


Denis Shutin (Orel State University (OSU), rover.ru@gmail.com)


Elena Kornaeva (Orel State University (OSU), lenoksbox@mail.ru)


Leonid Savin (Orel State University (OSU), savin3257@mail.ru)

in Proceedings of the Third International Conference Nonlinearity,Information and Robotics 2022, August 24, 2022