Simulation of a pilot control valve using pseudo bond graph approach

The dynamic behaviors of a pilot control valve have been studied using the pseudo bond graph approach. The pseudo bond graph model can synchronously retain the mathematical structure and the physical structure of the research object. State equations are deduced from the pseudo bond graph model and been numerically solved with MATLAB-SIMULINK. The simulation results show that the pilot control valve can work well in despite of an unexpected response. The profiles of the gas pressure in different chambers and the displacement of the valve spool are obtained. The pseudo bond graph model can predict the dynamic behaviors of the pilot control valve, thereby providing reference for further optimization.