针对大型舰船的新型分布式主动振动控制算法  

A Novel Distributive Active Vibration Control Algorithm for Large-sized Ships

作　　者：李经良 陆洋[1] LI Jingliang;LU Yang(National Key Laboratory of Helicopter Rotor Dynamics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学直升机旋翼动力学国家级重点实验室,南京210016

出　　处：《噪声与振动控制》2023年第6期51-56,共6页Noise and Vibration Control

基　　金：江苏高校优势学科建设工程资助项目;南京航空航天大学科研与实践创新计划资助项目(xcxjh20210105)。

摘　　要：通过抑制螺旋桨等旋转设备引起的结构低频振动,可有效降低艇体低频声辐射。基于多通道自适应控制算法的主动振动控制技术由于减振效果好、重量代价小、频率自适应能力强等优点已成功应用于各型舰船中。对于大型舰船,需要更多的作动器和误差传感器形成更大规模的多通道系统才能满足减振需求,这将导致各误差通道耦合更复杂和运算量剧增,现有集中式算法的嵌入式系统为完成此大规模多通道系统庞大的运算量,将需要更高性能的运算单元和存储器,从而导致工程实现十分困难。借鉴无线传感器网络中的增量协作策略环形拓扑结构来优化误差通道的耦合关系,提出一种适合于大规模多通道系统的分布式主动振动控制算法。以某大型舰船旋转设备安装结构为仿真模型,开展规模为20×20的减振仿真研究,仿真结果表明:双频仿真平均加速度级衰减26 dB,单频仿真加速度级衰减约27.5 dB,运算量均可降低约77%。验证所提分布式算法在有效抑制艇体低频振动前提下,可显著降低运算量。The low frequency sound radiation of the hull can be effectively reduced by suppressing the low frequency vibration of the structure caused by rotating equipment such as propeller.Active vibration control technology based on multichannel adaptive control algorithm has been successfully applied to various ships due to its advantages of good control performance,light weight and strong frequency adaptive ability.For a large-sized ship,more actuators and error sensors is needed to form a large-scale multichannel system to meet the vibration reduction requirements.However,it will lead to more complex coupling of error channels and a sharp increase of computation cost.The embedded system of the existing centralized algorithm requires higher performance computing unit and memory to complete the computation of the largescale multichannel system,which makes the engineering implementation more difficult.Therefore,a novel distributive active vibration control algorithm based on the incremental cooperative strategy,a widely used method in Wireless Sensor Network(WSN)system,is proposed.This distributive algorithm relieves the coupling of secondary paths and reduces the computation cost by discarding some secondary paths.An active vibration control simulation with a scale of 20×20 is carried out for the rotating equipment mounting structure of a large-sized ship.The simulation results show that the average acceleration level attenuation of dual-frequency simulation is over 26 dB,and single-frequency simulation is about 27.5 dB.Compared with the centralized algorithm,the computation cost is reduced by 77.27%.It is verified that the presented distributive algorithm can significantly reduce the low frequency vibration of the hull and the computational cost.

关 键 词：振动与波 主动振动控制 大规模多通道系统 分布式算法 增量协作策略 大型舰船 

分 类 号：TB123[理学—工程力学] TB535[理学—力学] U661.44[交通运输工程—船舶及航道工程]