Modeling And Simulation Of Rudder Hydraulic System Based On Modelica

In addition to the various valves and the pipeline, complex hydraulic system also include other areas of components, such as machinery, electronics, control and thermal. The traditional method of analysis is to use a single professional software, but it only simulate local system or subsystem. In order to model and simulate all the field components in hydraulic system, this thesis which studies submarine’s rudder hydraulic system uses multi-domain modeling techniques that based on Modelica language. As an object-oriented physical system modeling language, Modelica can support the development of various professional model library, and also can be effectively used in the modeling and simulation of complex hydraulic system.At first, this thesis analyzes the current situation, existing problems and development trends of hydraulic system in modeling and simulation, and puts forward multi-domain modeling techniques which is used in the study of rudder hydraulic system.Then hydraulic components are established based on their mathematical model in MWorks platform with Modelica language. After importing the three-dimensional model of the mechanical part, it’s easy to achieve the unified simulation of the mechanical subsystem and hydraulic subsystem.Finally, the rudder hydraulic system is simulated and analyzed, includingthe pressure pulsation of the components; the pressure and flow analysis when hydraulic oil is at30℃,60℃and90℃; the comparison of pressure and flow when pipe length is0m,10m and20m or inner diameter is2cm,3cm and4cm; and the control of simulation process.All the analysis of the hydraulic system are consistent with the actual situation, it’s prove the correctness of the components model and the feasibility of multi-domain modeling and simulation with Modelica language in the hydraulic field.