基于Smith模糊PID控制的温室监控系统设计  

Design of Monitoring and Control System of Greenhouse Based on Smith Fuzzy PID Control

作　　者：曾庆良[1] 顾强[2] 仉毅[1] 刘斌斌[2] 殷凡姣 

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590 [2]山东科技大学电气与自动化工程学院,山东青岛266590

出　　处：《计算机测量与控制》2015年第6期1964-1966,共3页Computer Measurement &Control

基　　金：山东省博士基金(BS2013NJ023);山东省自主创新专项(2013CXB40203)

摘　　要：针对温室控制系统被控对象模型的时变性、时滞性和易受干扰的问题,设计了一种基于Smith模糊PID控制的温室监控系统;该系统以MSP430F5438A单片机为核心,以PC机为远程监控终端实现了对温室温湿度的实时监测与控制;仿真结果表明:Smith模糊PID控制器具有调节时间快、超调量小、抗干扰能力强、鲁棒性好的优点;该系统与常规PID控制相比,超调量减小了11%,调节时间减小了23%,模型参数改为T=400,ι=130后,比Smith-PID控制超调量减小了15%,调节时间减小了30%。实验测试说明该系统控制精度高、稳定性好,具有很大的实用价值。As the object model is time--varying, time--delay and susceptible to interference in greenhouse control system, the green- house monitoring system based on Smith--Fuzzy PID controller was designed. With the system, real--time monitoring and controlling of the temperature and humidity were realized, taking MSP430F5438A as the core controller and PC as the remote monitoring terminal. Simulation results showed that Smith fuzzy PID controller possesses many advantages, such as the shorter adjusting time, smaller overshoot, stronger anti--interference ability and better robust performance. The overshot was reduced by 11% and the adjusting time reached a 23% reduction compared with those under PID control mode. In the case of the model that T= 400, r= 130, the overshot was reduced by 15 % and the ad- justing time reached a 30% reduction compared with those under Smith fuzzy PID control mode. Experiments show that the system possesses higher control accuracy, better stability and greater practical value.

关 键 词：温室 SMITH预估器 模糊PID 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]