推进器辐射声场有源控制试验研究OA

When an undersea vehicle is in motion,the propeller generates significant low-frequency line spectrum radiated noise.To verify the control effectiveness of different active control strategies on the line spectrum radiated noise,an active control experiment on the radiated sound fields was conducted for the first time on a real small-scale propeller.An underwater test platform,including a propeller,sensors,secondary force actuators,secondary sound sources,and a control system,was constructed for active noise control(ANC),active vibration control(AVC),and active noise and vibration control(ANVC)tests,respectively.By altering the working conditions of the propeller,the suppression effects of different control strategies on the radiated noise of the underwater propeller were tested.The results show that ANC has a significant and stable effect on suppressing the low-frequency line spectrum noise of the propeller,and performs best under high rotational speed working conditions;AVC has limitations and local control may lead to sound field reconstruction;ANVC shows potential for collaborative control in some working conditions,while the control strategy and collaborative mechanism need to be further optimized.The research results provide an experimental basis and technical support for the engineering active control of underwater propeller radiated noise.