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Energies 2017, 10(6), 780; doi:10.3390/en10060780

Theoretical and Experimental Studies of a Switched Inertance Hydraulic System in a Four-Port High-Speed Switching Valve Configuration

Centre for Power Transmission and Motion Control, Department of Mechanical Engineering, University of Bath, Bath BA2 7AY, UK
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Academic Editor: Andrea Vacca
Received: 28 March 2017 / Revised: 29 May 2017 / Accepted: 3 June 2017 / Published: 6 June 2017
(This article belongs to the Special Issue Energy Efficiency and Controllability of Fluid Power Systems)
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Abstract

The switched inertance hydraulic system (SIHS) is a novel high-bandwidth and energy-efficient digital device which can adjust or control flow and pressure by a means that does not rely on throttling the flow and dissipation of power. An SIHS can provide an efficient step-up or step-down of pressure or flow rate by using a digital control signal. In this article, analytical models of an SIHS in a four-port high-speed switching valve configuration are proposed, and the system dynamics and performance are investigated theoretically and experimentally. The flow responses, system characteristics, and power consumption can be predicted effectively and accurately by using the proposed models, which were validated by comparing with experiments and with numerical simulation. The four-port configuration is compared with the three-port configuration, and it is concluded that the former one is less efficient for valves of the same size, but provides a bi-direction control capability. As bi-direction control is a common requirement, this constitutes an important contribution to the development of efficient digital hydraulics. View Full-Text
Keywords: digital hydraulics; switched inertance hydraulic systems; four-port switching valves; efficient fluid power digital hydraulics; switched inertance hydraulic systems; four-port switching valves; efficient fluid power
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Pan, M.; Plummer, A.; El Agha, A. Theoretical and Experimental Studies of a Switched Inertance Hydraulic System in a Four-Port High-Speed Switching Valve Configuration. Energies 2017, 10, 780.

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