船舶分油机仿真系统的设计与实现

Design and realization of simulation system for marine oil purifiers

为帮助学员掌握分油机的工作原理和操作方法,以Alfa Laval S系列分油机为研究对象,结合层次状态机的概念,设计两层嵌套状态机作为分油机仿真系统的整个工作周期内的逻辑控制。通过简化分离筒的几何形状建立分油机的数学模型,以模拟分油机内油水分界液面的变化。采用树形拓扑结构描述操作菜单的信息显示。利用可编程逻辑控制器(programmable logic controller,PLC)通信技术,实现分油机的半实物仿真系统。测试结果表明,层次化的状态控制使得系统控制过程结构化、清晰化,状态之间的转换关系表达明确,能逼真地模拟分油机的工作过程。

In order to help students master the working principle and operation method of the oil purifier,the Alfa Laval S series oil purifier is taken as the research subject,and a two-layer nested state machine is designed as the logical control of the whole working cycle of the oil purifier simulation system based on the concept of the hierarchical state machine.The mathematical model of the oil purifier is established by simplifying the geometry of the separation cylinder.By this model,the change of the oil-water interface is simulated.A tree topology is used to describe the information display of the operation menu.With the application of the programmable logic controller(PLC)communication technology,the semi-physical simulation system of the oil purifier is realized.The test results show that the hierarchical state control makes the system control process structured and clear,the transition relationship between states is clearly expressed,and the working process of the marine oil purifier can be simulated realistically.