The Effective Fluid Bulk-Modulus Within a Hydrostatic Transmission

[+] Author and Article Information
N. D. Manring

Mechanical & Aerospace Engineering, University of Missouri-Columbia, Columbia, MO 65211

J. Dyn. Sys., Meas., Control 119(3), 462-466 (Sep 01, 1997) (5 pages) doi:10.1115/1.2801279 History: Received October 12, 1995; Online December 03, 2007


In this study, the fluid bulk-modulus within a hydrostatic transmission is examined. Specifically, a method for measuring the effective fluid bulk-modulus is proposed based upon the definition of the fluid bulk-modulus and the conservation of mass within the system. Using the measured parameters of flow and pressure, a numerical solution for the effective fluid bulk-modulus is carried out and a closed-form approximation to this solution is presented. Furthermore, the accuracy expectations of this method are discussed and compared with traditional methods of estimating the fluid bulk-modulus and it is shown that significant improvements can be made when the method of this research is employed.

Copyright © 1997 by The American Society of Mechanical Engineers
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