Mutuku Muvengei and John Kihiu
Bond Graph Modeling of InterActuator Interactions in a MultiCylinder Hydraulic System
282 - 291
2011
5
2
International Journal of Mechanical and Mechatronics Engineering
https://publications.waset.org/pdf/13901
https://publications.waset.org/vol/50
World Academy of Science, Engineering and Technology
In this paper, a bond graph dynamic model for a valvecontrolled
hydraulic cylinder has been developed. A simplified bond
graph model of the interactuator interactions in a multicylinder
hydraulic system has also been presented. The overall bond graph
model of a valvecontrolled hydraulic cylinder was developed by
combining the bond graph submodels of the pump, spool valve and
the actuator using junction structures. Causality was then assigned
in order to obtain a computational model which could be simulated.
The causal bond graph model of the hydraulic cylinder was verified
by comparing the open loop state responses to those of an ODE
model which had been developed in literature based on the same
assumptions. The results were found to correlate very well both
in the shape of the curves, magnitude and the response times,
thus indicating that the developed model represents the hydraulic
dynamics of a valvecontrolled cylinder. A simplified model for interactuator
interaction was presented by connecting an effort source with
constant pump pressure to the zerojunction from which the cylinders
in a multicylinder system are supplied with a constant pressure from
the pump. On simulating the state responses of the developed model
under different situations of cylinder operations, indicated that such
a simple model can be used to predict the interactuator interactions.
Open Science Index 50, 2011