A Parameter Sensitivity Analysis for the Dynamic Model of a Variable Displacement Axial Piston Pump

Abstract

Sensitivity analysis is applied to an investigation of the influence of parameters on the dynamics of a variable displacement axial piston pump. Since an exact mathematical model of piston pump is complex and highly non-linear, the investigation of its dynamic characteristics for the variation of the system parameters by changing separate parameter values in sequence becomes very ineffective. In this paper a parameter sensitivity analysis was employed to analyse the effects of the system parameters systematically. The analysis was done on the exact non-linear dynamic model of the pump system which is represented by fourth-order dynamics. Based upon the simulation results, the degree of influence of each parameter and the justification of order reduction are discussed in some detail.

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References

Dreymuller

Pilot-operated and directly actuated pressure control with variable delivery axial piston pumps. Proceedings of the Fourth Symposium on Fluid power, 1975, pp. B1–1–B1–20.

Rigby

R. W.

An integral control constant pressure device with built in stabilization for variable delivery axial piston hydraulic pump. Proceedings of the First Symposium on Fluid power, 1969, paper SP-988, pp. 159–169.

Yehia

E. I.

Design and performance of a new electrohydraulic variable displacement axial piston pump. Proceedings of National Conference on Fluid power, 1983, pp. 172–175.

Zeiger

Akers

Dynamic analysis of an axial piston pump swashplate control. Proc. Instn. Mech. Engrs., Part C, 1986, 200 (C1), 49–58.

Frank

P. M.

Introduction to system sensitivity theory, 1978 (Academic Press, New York, London).

R. Z.

Kinematics of axial piston pumps with swashplate and hydrostatic bearings. Basic Fluid Power Res. J., 1985, 18 (1), 77–85.

Vilenius

M. J.

The application of sensitivity analysis to electrohydraulic position control servos. J. Dynamic Systems, Measurement and Control, June 1983, 105, 77–82.

Merrit

H. E.

Hydraulic control systems, 1967 (John Wiley).

Industrial hydraulic manual, first edition, 1970 (Sperry Vickers).