A Hydraulic Rotary Switched-Inertance Servo-Transformer

[+] Author and Article Information
F. T. Brown, S. C. Tentarelli, S. Ramachandran

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015

J. Dyn. Sys., Meas., Control 110(2), 144-150 (Jun 01, 1988) (7 pages) doi:10.1115/1.3152664 History: Received April 08, 1987; Online July 21, 2009


Switched-reactance hydraulics represents a radically novel approach to the control of fluid power, since the proportional metering of flow through adjustable orifices is eliminated, and the inertive properties of the fluid substituted. Potential advantages in bandwidth, linearity, and efficiency have been indicated. This paper presents the first steady-state theory and experiments with a rotary fluid switch, which accomplishes the needed pulse-width modulation at a desirably high frequency. Cavitation problems are observed, means of their partial solution are implemented, and means of a more complete solution are indicated.

Copyright © 1988 by ASME
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