基于PLC模糊自适应PID伺服控制系统  

A Fuzzy Adaptive PID Servo Control System Based On PLC

作　　者：强明辉[1] 何晓[1] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《自动化与仪器仪表》2013年第4期180-181,183,共3页Automation & Instrumentation

摘　　要：将模糊自适应PID控制与PLC控制技术相结合,利用PLC来实现模糊自适应PID控制。相对于目前PLC通过查表来实现模糊控制的方法,文章在基于模糊控制规则表的基础上,提出了运用Matlab系统仿真工具,通过Matlab中的函数evalfis()求取模糊控制器在特定输入下的输出,然后取观测值,使用函数拟合的方法,得到模糊控制器的输入输出函数关系式,最后采用PLC作为控制器来实现这一函数关系,即直接由PLC实现函数运算来代替之前的表格查询语言,从而实现对伺服电机更为快速的控制;同时,对控制系统进行相应的仿真。仿真结果表明,文章提出的用PLC实现模糊自适应控制的方法,较之经典的PID控制方法,更能够满足系统的快速性要求,在实际应用中,可以有效减少系统的响应时间,提高系统的动态性能。This paper will combine fuzzy adaptive PID control with PLC control technology to achieve fuzzy adaptive PID con- trol by using PLC. Relative to the currently used PLC through a look-up table to achieve fuzzy control method, this paper get the input and output of the fuzzy controller function formula through the matlab function evalfis 0 and function fitting based on fuzzy con- trol rule table and matlab system simulation tools, and then use the PLC as a controller to achieve this function, that is implemented directly by the PLC function operation instead table query language, and thus to achieve more rapid control of the servo motor; meanwhile, conducting corresponding simulation. The result shows that this paper presents the fuzzy adaptive control method, com- pared to the classic PID control method, have better able to meet the system＇s rapid requirements, to reduce the response time of the system, to improve the dynamic performance of the system with PLC.

关 键 词：模糊自适应PID控制 PLC 输入输出函数 伺服电机 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置]