Modeling of Electro-Hydraulic Power Steering System using Bond Graph Technique

A mechanism consists of a number of rigid bodies. The modeling of a mechanism is important for design and control of a system. In mechanics, the formalized procedures for modeling dynamics, like Newton-Euler, Lagranges Euler and Hamiltonians method, are mathematically burdensome for large and complex multi-body systems. Moreover, these procedures do not present cause and effect relationship. The bond graph technique is a graphical representation of dynamics. The application of bond graph technique results in a number of advantages. In this paper, an attempt is being done to use bond graph technique for modelling and simulation of Electro-Hydraulic Power steering system. This mechanism is taken to show an important feature of bond graph that it is a modeling tool which can be used for analyzing dynamics in various energy domains. The mechanism being considered is a combination of Electrical, Hydraulic and mechanical systems. The use of bond graph for modeling multi energy domain has rarely been explained.