基于Simulink的机电液系统虚拟样机建模方法

Virtual prototype modeling of mechanical electro-hydraulic system based on Simulink

针对机电液一体化系统各学科间参数耦合关联、单一学科的建模仿真分析无法有效反映系统整体性能的问题,提出了基于Simulink统一平台的机电液一体化系统虚拟样机建模策略。该方法分别采用Simulink软件的不同工具箱建立各领域子系统的仿真模型,然后根据各领域子系统间的约束耦合关系,实现基于Simulink同一平台的机电液一体化系统虚拟样机仿真分析。最后,以液压挖掘机为例,建立了挖掘机的整机虚拟样机模型并研制了实验样机,通过仿真与实验结果的对比分析证明了该方法可以有效地实现机械、液压、控制系统的有机集成,高效、可靠地构建机电液一体化系统的非线性仿真模型并进行仿真分析,为机电液一体化系统的优化设计与集成仿真分析提供了有效的支撑平台。

For the parameters coupling of the mechanical electro-hydraulic integration system, the simulation analysis of the single subject can＇t reflect the system performance effectively. The modeling method of mechanical electro-hydraulic integration system based on the Simulink software was proposed. The simulation models of subsystems were built by the corresponding toolbox of Simulink software; then the virtual prototype simulation model of mechanical electro-hydraulic integration system was built based on the Simulink software, according to the constraints coupling relation model. Finally, the hydraulic excavator was selected as an example, a virtual prototype simulation model of hydraulic excavator was constructed and a physical prototype of the excavator was designed. The result of the comparison between simulation and experiment shows that the method can realize the organic integration of mechanical, hydraulic and control systems, establish the nonlinear simulation model of mechanical electro-hydraulic integration system effectively and reliably. The modeling method provides an effective supporting platform for optimal design and integrated analysis of mechanical electro-hydraulic integration system.