Novel Integrated Control of Fluid-Borne Noise in Hydraulic Systems
Novel Integrated Control of Fluid-Borne Noise in Hydraulic Systems
复制标题
DOI：
10.1115/fpmc2018-8828
复制
发表时间：
2018-09
期刊：
影响因子：
--
通讯作者：
Min Pan;Beichen Ding;Chenggang Yuan;J. Zou;Huayong Yang
中科院分区：
文献类型：
--
作者：
Min Pan;Beichen Ding;Chenggang Yuan;J. Zou;Huayong Yang
液压机械的噪声主要有流体噪声、结构噪声和空气噪声。FBN是由泵和马达或数字液压装置的操作产生的不稳定流动引起的，并通过系统传播，引起SBN，SBN又引起ABN。本文报道了一种新的集成FBN衰减方法，它采用了一个混合控制系统，通过集成一个有源前馈噪声衰减器与被动调谐柔性软管。被动软管被调谐以消除高频压力脉动，而主动控制器被设计成衰减主谐波纹波。采用自适应陷波滤波器和变步长滤波-X最小均方算法，设计了一种高预紧力、高操作力、宽带宽、线性动态特性良好的新型压电主动驱动器。采用考虑纵壁波和流体波耦合的时域软管模型对软管进行建模和调谐。通过数值仿真和实验验证了该方法的有效性。可以得出结论，具有被动柔性软管的主动衰减器可以形成用于FBN衰减的有效、成本效益高且实用的解决方案。由于液压动力机器产生的高噪声水平的问题已经在工业界和公众中引起了极大的关注，这项工作对低噪声液压流体动力机器的可持续发展做出了重要贡献。
The noise in hydraulic machines presents itself as fluid-borne noise (FBN), structure-borne noise (SBN) and air-borne noise (ABN). FBN is caused by the unsteady flow produced by pumps and motors or the operation of digital hydraulics, and propagates through the system causing SBN, which in turn causes ABN. This article reports on a novel integrated FBN attenuation approach, which employs a hybrid control system by integrating an active feedforward noise attenuator with passive tuned flexible hoses. The passive hoses are tuned to cancel the high-frequency pressure pulsations, whilst the active controller is designed to attenuate the dominant harmonic ripples. Adaptive notch filters with a variable step-size filtered-X Least Mean Square algorithm were applied in the new designed active piezoelectric actuator with high preload and operating forces, a wide bandwidth and very good linear dynamics. A time-domain hose model considering coupling of longitudinal wall and fluid waves was used to model and tune the flexible hose. Very good FBN cancellation was achieved by using the proposed integrated control approach, which was validated by comparing with numerical simulation and experiments. It can be concluded that the active attenuator with passive flexible hoses can form an effective, cost-efficient and practical solution for FBN attenuation. As the problem of high noise levels generated by hydraulically powered machines has risen significantly in awareness amongst industry and the general public, this work constitutes an important contribution to the sustainable development of low noise hydraulic fluid power machines.