Adaptive Control of a Piezoelectric Valve for Fluid-Borne Noise Reduction in a Hydraulic Buck Converter
Adaptive Control of a Piezoelectric Valve for Fluid-Borne Noise Reduction in a Hydraulic Buck Converter
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DOI：
10.1115/1.4035613
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发表时间：
2017-08
影响因子：
1.7
通讯作者：
Min Pan
中科院分区：
文献类型：
--
作者：
Min Pan
液压降压转换器(HBC)是一种新型的高带宽、高能效的装置，它可以通过不依赖节流和功率消耗的方式来调节或控制流量和压力。然而，HBC的性质会导致严重的流体噪声(FBN)，即充液液压回路中的压力或流动不稳定。这是由于该装置的高速开关阀的操作性质所致。FBN在管道上产生脉动力，导致系统结构噪声，使空气噪声高达85dB。因此，需要一种不损害系统性能和效率的有效方法来降低FBN。本文首次提出了一种基于串联和旁路结构的有源控制器，用于消除高铁电路板中的FBN。利用解析模型研究了HBC的动力学和噪声问题。采用响应快、作用力大的压电式液压阀作为自适应FBN衰减器。对所设计的噪声控制器在不同工作条件下的性能和鲁棒性进行了研究。仿真和实验结果表明，该方法具有很好的消噪效果(30d B)。所提出的有源衰减器是现代数字液压系统中FBN衰减的一种非常有前途的解决方案，这些系统具有很高的能量效率，但在实际应用中会遇到严重的噪声或振动问题。
The hydraulic buck converter (HBC) is a novel high-bandwidth and energy-efficient device which can adjust or control flow and pressure by a means that does not rely on throttling the flow and dissipation of power. However, the nature of a HBC can cause severe fluid-borne noise (FBN), which is the unsteady pressure or flow in the fluid-filled hydraulic circuit. This is due to the operation nature of a high-speed switching valve of the device. The FBN creates fluctuating forces on the pipes which lead to system structure-borne noise that develops air-borne noise reaching to 85dB. Thus there is a need for an effective method that does not impair the system performance and efficiency to reduce the FBN. This paper describes the first investigation of an active controller for FBN cancellation in a HBC based on in-series and by-pass structures. The dynamics and the noise problem of the HBC are investigated using the analytical models. A piezoelectrically actuated hydraulic valve with a fast response and high force is applied as the adaptive FBN attenuator. The performance and robustness of the designed noise controller were studied with different operating conditions of a HBC. Simulated and experimental results show that excellent noise cancellation (30dB) was achieved. The proposed active attenuator is a very promising solution for FBN attenuation in modern digital hydraulic systems which promise high energy efficiency but suffer severe noise or vibration problems in practice.