Piezoelectric Actuation in a High Bandwidth Valve

Abstract

To expand the operational capabilities of hydraulically actuated systems the development of new valves capable of enhanced flow rates and bandwidth performance is required. In previous work, the solution to achieving desired flow rates was to increase valve spool size and travel, but this is at the expense of the dynamic response. To increase flow without restricting dynamic performance, this paper proposes the use of multiple metering edges achievable using the Hörbiger plate valve principle, actuated by piezoelectric means. Experimental results from a piezoelectric actuated valve are then used to demonstrate improved performance in both static and dynamic operation.

Keywords:

• Piezoelectric
• hydraulic valve design
• actuation
• bandwidth
• Hörbiger

Acknowledgments

The authors wish to thank the Engineering and Physical Sciences Research Council (EPSRC) of the UK for funding this project through grant EP/D060478/1.