Modeling and simulation of hydraulic systems by bond graphs

Abstract

This paper describes a unified approach to modeling and simulation of hydraulic systems using bond graphs. Unlike the others, the causalities are not applied in bond graph settings. This leads that mathematical model is generated in the form of differential algebraic equation (DAEs) and solved as such by suitable solver. Bond graph model of simple hydraulic system has developed using program BondSim. Several hydraulic components are developed and stored in the program library. They can be reused in modeling of complex systems. Simulation results are compared with ones obtained using MATLAB/Simulink showing good agreement. Proposed methodology can be applied to modeling of systems, which are composed of hydraulic, mechanical and electrical systems. This synergy is widely applied in field of mobile machines, machine tools and other industrial machines and devices where hydraulic systems are often used for power transmission. Bond graphs can be efficiency used in modeling of mechatronics system in whole.