Active control of propulsion shafting&rsquo;s lateral vibration with active stern support and local velocity feedback control

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (9) : 115-122.

Active control of propulsion shafting’s lateral vibration with active stern support and local velocity feedback control

XIE Xiling1,2, QIN Hui1,2, XU Yinglei1,2, ZHANG Zhiyi1,2

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Abstract

The shafting-hull coupled vibration induced by the propeller fluctuating thrust forces is an important source of the low frequency radiation of submarines. An active control method, which uses active stern support and local velocity feedback control, is presented to suppress the transmission of lateral vibration of the propulsion shafting. The dynamic model of the propeller-shafting-hull coupled system embedded with the 6-DOF active stern support is established with the finite element method and the performance of the local velocity feedback control is evaluated. The results demonstrated that the performance of the lateral vibration control with the active stern support is prominent and a noticeable attenuation in the frequency range of 0-200Hz is achieved. In addition, the active control method is able to obtain a better attenuation at some critical mode frequencies with the combined control at the stern support and the thrust bearing.

Key words

Lateral vibration / Stern support / Velocity feedback / Active control

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XIE Xiling1,2, QIN Hui1,2, XU Yinglei1,2, ZHANG Zhiyi1,2. Active control of propulsion shafting’s lateral vibration with active stern support and local velocity feedback control[J]. Journal of Vibration and Shock, 2019, 38(9): 115-122

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