Affiliation:
1. Department of Mechanical Engineering, Centre for Power Transmission and Motion Control, University of Bath, Bath BA2 7AY, UK e-mail:
Abstract
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 85 dB. 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 (30 dB) 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.
Subject
Computer Science Applications,Mechanical Engineering,Instrumentation,Information Systems,Control and Systems Engineering
Reference38 articles.
1. Quieter Fluid Power Handbook: Silencing Fluid-Borne Noise,1981
2. Johnston, D. N., 2009, “A Switched Inertance Device for Efficient Control of Pressure and Flow,” ASME Paper No. DSCC2009-253510.1115/DSCC2009-2535.
3. Brown, F. T., 1987, “Switched Reactance Hydraulics: A New Way to Control Fluid Power,” National Conference on Fluid Power, Chicago, IL, Mar. 2–5, pp. 25–34.
4. A Hydraulic Rotary Switched Inertance Servo-Transformer;ASME J. Dyn. Syst. Meas. Control,1988
5. Active Control of Fluid-Borne Noise,2008
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献