Modeling and Designing a Hydrostatic Transmission With a Fixed-Displacement Motor

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

Department of Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO 65211

G. R. Luecke

Department of Mechanical Engineering, Iowa State University, Ames, IA 50011

J. Dyn. Sys., Meas., Control 120(1), 45-49 (Mar 01, 1998) (5 pages) doi:10.1115/1.2801320 History: Received October 12, 1995; Online December 03, 2007


This study develops the dynamic equations that describe the behavior of a hydrostatic transmission utilizing a variable-displacement axial-piston pump with a fixed-displacement motor. In general, the system is noted to be a third-order system with dynamic contributions from the motor, the pressurized hose, and the pump. Using the Routh-Hurwitz criterion, the stability range of this linearized system is presented. Furthermore, a reasonable control-gain is discussed followed by comments regarding the dynamic response of the system as a whole. In particular, the varying of several parameters is shown to have distinct effects on the system rise-time, settling time, and maximum percent-overshoot.

Copyright © 1998 by The American Society of Mechanical Engineers
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