A robust adaptive pressure control strategy is proposed for a novel indexing variable-displacement pump. In the proposed approach, parametric uncertainties and unmodeled dynamics are identified to the extent possible using a model free learning network and used to decouple the dynamics using physical insights derived from careful reduced order modeling. The swash plate motion control is then carefully designed to provide the desired pressure response characteristics showing improved performance with learning. The proposed control framework and designs are validated using a detailed nonlinear simulation model.

Issue Section:
Technical Papers
Keywords:
pumps, robust control, nonlinear control systems, adaptive control, valves
Topics:
Dynamics (Mechanics), Indexing (Machining), Pressure, Pumps, Valves, Simulation, Servomechanisms
1.
Manring, N. D., 1996, “Displacement Control for a Variable Displacement Axial Piston Pump,” U.S. Patent 5,564,905, Oct. 15, 1996.
2.
Cho, J., Zhang, X., Manring, N. D., and Nair, S. S., 1999, “Dynamic Modeling of an Indexing Valve Plate Pump,” Fluid Power Systems Technology Sessions, ASME International Mechanical Engineering Congress and Exposition, Nashville, TN, pp. 17–24.
3.
Zhang, X., Cho, J., Nair S. S., and Manring, N. D., 2000, “Reduced Order Modeling of the Dynamics of an Indexing Valve Plate Pump,” Proc. of American Control Conf., Chicago, IL, pp. 3595–3599.
4.
Manring
,
N. D.
, and
Johnson
,
R.
,
1996
, “
Modeling and Designing a Variable-Displacement Open-Loop Pump
,”
ASME J. Dyn. Syst., Meas., Control
,
118
, pp.
267
–
271
.
5.
Zhang, X., Cho, J., Nair, S. S., and Manring, N. D., 2000, “Feed Forward Plus Feedback Control of an Indexing Valve Plate Pump,” Proc. of Fluid Power Systems Technology Division, ASME International Mechanical Engineering Congress and Exposition, Orlando, FL, pp. 23–29.
6.
Lin
,
S. J.
, and
Akers
,
A.
,
1990
, “
Optimal Control Theory Applied to Pressure-Controlled Axial Piston Pump Design
,”
ASME J. Dyn. Syst., Meas., Control
,
112
(
3
), pp.
475
–
481
.
7.
Zhang
,
X.
,
Cho
,
J.
,
Nair
,
S. S.
, and
Manring
,
N. D.
,
2000
, “
Damping on the Swash Plate of an Axial Piston Pump
,”
ASME J. Dyn. Syst., Meas., Control
,
123
(
3
), pp.
463
–
470
.
8.
Du
,
H.
, and
Nair
,
S. S.
,
1998
, “
Learning Control Design for a Class of Nonlinear Systems
,”
Engineering Applications of Artificial Intelligence
,
11
, pp.
495
–
505
.
Copyright © 2002
 by ASME
You do not currently have access to this content.