Active damping device suppresses vibration of thin-walled workpiece

Thin-walled workpieces,due to their unique structural properties, are extensively utilized in aerospace parts, and the severe vibration of thin-walled parts pose significant safety hazards to equipment operation. A method of controlling structural vibration of thin-walled workpiece with active damping device (ADD) is proposed,and the dynamic model of the actuator is built, the control principle of the controlled system are analysed based on the direct velocity feedback control algorithm (DVF), and an experimental bench of vibration suppression of thin-walled workpiece by the ADD is built and the vibration control effects of workpieces with varying excitation frequency, amplitude, and thickness are compared. The results show that the ADD has the characteristics of wide frequency band and good self-adaptive effect.The ADD can effectively suppress the vibration of thin-walled workpiece under different excitation frequencies with the maximum reduction of 34.03%,and it has control effects on workpiece vibration at different excitation force amplitudes, with a maximum reduction of 36.2%,can reduce the structural vibration of the workpiece with different thicknesses. The research provides new ideas for the vibration control of thin-walled workpieces and the design of active damping devices.