Eur. Phys. J. Appl. Phys.
Volume 86, Number 3, June 2019
|Number of page(s)||10|
|Section||Physics of Energy Transfer, Conversion and Storage|
|Published online||29 July 2019|
Active vibration control of rotor-bearing system by virtual dynamic absorber
Department of Mechanical Engineering, Malayer University, Malayer, Iran
* e-mail: firstname.lastname@example.org
Received in final form: 5 June 2019
Accepted: 13 June 2019
Published online: 29 July 2019
The main sources of the vibration in rotor dynamic systems are unbalanced masses and manufacturing defects of bearings used in the rotor system. In this study, magnetic absorber as a new method brings the rotor system out of resonance state by applying a dynamic absorber system force and creating two new natural frequencies. This study virtually reconstructed magnetic absorber controller software as a combined active and passive dynamic absorber to reduce vibration amplitude, efficiently. In this approach, combined routes are defined for the rotor frequency response, so that the optimal values of the parameters of dynamic absorber system are calculated using H∞ method and maximum damping for frequencies lower and higher than resonance frequencies, respectively. The results confirm that transient response overshoot is less, and transient response attenuation is more in maximum damping method. Hence, the controller system easily recognizes initial overshoots and determines the parameters of the dynamic absorber system in accordance with maximum damping state if it is struck at any rotor frequency and any rotation angle. It is also observed that for all rotor rotation frequencies, the system overshoot reduces in comparison with H∞ method by using this control method.
© EDP Sciences, 2019
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