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Self-excited vibration suppression of spline-shaft system with a piezo-actuated smart dry friction damper
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DOI：10.1016/j.mechatronics.2026.103514.png)
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Abstract
En 中文
Floating splines are widely used in helicopter tail transmission systems due to their simplicity, reliability, and high specific power. However, long-term operation leads to lubrication degradation, which increases tooth surface friction and may even introduce self-excited vibrations, thereby affecting system stability. To address this issue, a self-excited vibration suppression method for a supercritical spline-shaft system based on a piezoactuated smart dry friction damper is proposed. The proposed method integrates piezoelectric actuation control into the conventional dry friction damper of the helicopter transmission shaft system. A dynamic model of the supercritical shaft system incorporating a floating spline and a dry friction damper is established, and numerical simulations are conducted to reveal the self-excited vibration characteristics. The coupled dynamic response is further derived to verify the feasibility of suppressing self-excited vibration through the damper. Finally, the structural design and control strategy of the piezo-actuated smart dry friction damper are presented. The findings provide new insights and theoretical references for vibration control and damper design of splineshaft systems in helicopter.
Keywords:
Self-excited vibration
Floating spline
Dry friction damper
Vibration suppression
Supercritical drive shaft
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