状态机原理在控制程序设计中的应用

The application of the finite automation principle in control program

计算机控制系统的控制程序具有有限状态自动机(FA)的特征,可以用有限状态机理论来描述。利用状态转移图和条件编码,可以更直观和清晰地描述程序的转移与条件的关系。由于使用二进制编码描述程序的转移条件,使得复杂的程序结构都变成了一种规则的结构,因此基于该方法的程序结构更简单,编写程序更容易,程序的调试、修改与功能扩展更方便。该方法已经成功应用于电火花多维数控系统的程序设计过程。

Computer control system is a discrete system. It has the characteristics of Finite Automation （FA） and can be described by FA. FA is a mathematic model for describing the system of disperse, it can directly describe the relation of states and inputs by state diagram. The application of state diagram and condition code can more directly and clearly describe the relation of system states and input condition than the custom. So the program structure based on is very simply and it is easy to write by assembler or C language. It is verified by testing and applying, the program is easy to debug and update.