顺序功能图的缺陷与改进研究（英文）  

Study on the defects and improvement of sequential function chart

作　　者：张中明[1] 吴晓苏[1] 陈恩爱[1] 郑小康[1] 

机构地区：[1]杭州职业技术学院,杭州310018

出　　处：《机床与液压》2015年第12期125-130,共6页Machine Tool & Hydraulics

基　　金：supported by Department of Education of Zhejiang Province ( No. jg2013281);Hangzhou Education Bureau ( No. [2013]55-23)

摘　　要：为了解决现有顺序功能图无法灵活地表达自动循环与手动操作之间的工作状态转换问题,以液压动力滑台典型工作步骤为研究对象,提出了增设状态变量并插入微小分支回路的方法来保存两种状态之间的动态存储器变化过程。研究表明:重新设计后的顺序功能图与梯形图之间呈现出了更为严格的映射关系。通过图论建模发现,模型重构后连通图的最大流数量比之前有所增加,但是仍然符合图的封闭性原则,从而维持了控制系统的稳定性。通过现场观察梯形图的运行过程,控制程序在两种状态之间实现了断点无扰动切换,验证了新算法的正确性与可靠性。In order to solve the problem that the current sequential function chart cannot express the conversion between automatic circulation and manual operation flexibly, taking the example of the typical work steps of hy- draulic power sliding table as the research object, the paper brings forward a method by adding state variables and inserting some micro branches to hold the change process of dynamic memory between these two states. The se- quential function chart and ladder diagram shows a more rigorous mapping relationship after redesign. By means of graph theory model establishment, we can find that the number of maximum flow has been increased than before after model reconstruction, but it still meets the needs of closure principle of graph, so as to maintain the stability of the control system. Through the observation of running the ladder diagram on the spot, the control program can shift between these two states with non-disturbance at the breakpoint, verifying the correctness and reliability of the new algorithm.

关 键 词：液压动力滑台 顺序功能图 自动循环 映射关系 模型重构 

分 类 号：TG502.32[金属学及工艺—金属切削加工及机床]