There is a diverse range of applications for active hydraulic mounts such as vibration absorbers, flight simulators, and industrial test rigs. The purpose of the mount considered here is to make a mass that is driven by an external force and a hydraulic actuator behave as if it were a prescribed mechanical impedance driven solely by the external force. We develop a model of this mount that includes the effects of servovalve dynamics and fluid compressibility and will be used in the future design of a robust control system. Then the conic sector bound method, which is readily amenable to the application of established robust control methodologies, is used to describe a family of linear time-varying plants that could be used to represent the nonlinear behavior of the system.

1.
FitzSimons
P. M.
, and
Chao
C. P.
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Choosing the Best Conic Sector Bounds to Capture System Nonlinearity
,”
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Jinghong
Y.
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Zhaoneng
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Yuanzhang
L.
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1994
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The Variation of Oil Effective Bulk Modulus with Pressure in Hydraulic Systems
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Palazzolo, J. J., 1994, “Design of an Active Hydraulic Mount with Programmable Mechanical Impedance,” Master of Science Thesis, Department of Mechanical Engineering, Michigan State University, East Lansing, MI.
4.
Watton, J., 1989, Fluid Power Systems—Modeling, Simulation, and Microcomputer Control, Prentice-Hall, NJ.
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