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Title page for ETD etd-09222008-104852

Type of Document Dissertation
Author Li, Bo Tyler
Author's Email Address b.li@vanderbilt.edu
URN etd-09222008-104852
Title Design and Control of a Variable Displacement Vane Pump for Valveless Hydraulic Actuation
Degree PhD
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Michael Goldfarb Committee Chair
Eric Barth Committee Member
George Cook Committee Member
Nilanjan Sarkar Committee Member
Robert Webster Committee Member
  • valveless hydraulic actuation
  • designe and control
  • variable pump
  • Pumping machinery -- Design and construction
  • Actuators -- Design and construction
  • Robots -- Power supply
Date of Defense 2008-06-27
Availability unrestricted
This dissertation describes the design, modeling, control and efficiency of a variable displacement vane pump based hydraulic actuation system, which is motivated by the need for enhanced efficiency and compactness in mobile hydraulic actuation systems. The dissertation describes the design of a variable vane pump, and characterizes the pressure/flow characteristics of the fabricated pump. A dynamic model of the variable vane pump based hydraulic actuation system is developed. A linear controller and a model-based nonlinear controller are formulated respectively for displacement tracking control of the pump-driven hydraulic actuation system and their performances are compared. Experimental results of the displacement controlled pump/actuator system indicate the effectiveness of the controller. The efficiency of the proposed system is characterized and measured through experiments, which results show efficiencies of 19 to 48%, depending on different tracking frequencies.
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