Multi-harmonic adaptive feedforward active control method based on parametric scale transformation

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (21) : 300-309.

UAN Ningyuan1,2, FAN Wenkun1, SONG Yixin1, LIU Bo1, TONG Zongpeng1,2, HUA Hongxing3

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Abstract

The pulsation force of the propeller related to the shaft frequency, blade frequency, and doubling frequencies excites multi-narrowband low-frequency line-spectrum vibrations of the shafting system. The pulsation force’s amplitude, frequency, and phase fluctuate with time considering variations in the shaft speed, oil film lubrication, and other conditions. This paper proposes an adaptive feedforward control method based on the parameter scale transformation for the time-varying multi-harmonic line-spectrum vibrations of the shafting system. Based on the multi-span and multi-support propulsion shaft model, simulation verification of the multi-harmonic adaptive feedforward control algorithm was conducted, achieving balanced attenuation of multiple narrowband interferences. Considering the channel coupling effect, the multi-channel active vibration control strategy for the multi-input multi-output system was established, and the control performance of the multi-channel cross-coupling tonal vibrations was analyzed. The results indicate that the adaptive feedforward control method proposed has a good control effect on time-varying multi-tonal vibrations of the propulsion shafting system.

Key words

active control / feedforward control / adaptive algorithm / tonal vibrations / scale transformation

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UAN Ningyuan1, 2, FAN Wenkun1, SONG Yixin1, LIU Bo1, TONG Zongpeng1, 2, HUA Hongxing3. Multi-harmonic adaptive feedforward active control method based on parametric scale transformation[J]. Journal of Vibration and Shock, 2024, 43(21): 300-309

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