灰色预测模糊PID灌溉控制技术开发  

Grey Prediction Fuzzy-PID Control Technology for Irrigation

作　　者：张育斌[1] 魏正英[1] 马胜利[1] 唐大辉 李建军[2] 

机构地区：[1]西安交通大学机械制造系统工程国家重点实验室,西安710054 [2]新疆大学机械工程学院,乌鲁木齐830047

出　　处：《中国农村水利水电》2016年第2期5-8,共4页China Rural Water and Hydropower

基　　金：农业领域国家科技计划("863"计划)资助项目(2011AA100509-01);新疆维吾尔自治区高技术计划项目(201413102)

摘　　要：针对节水自动灌溉中的水肥比例调节和灌溉精度低的控制问题,设计了基于PID控制、模糊控制和灰色预测控制相结合的控制算法,在PID控制的基础上,通过模糊规则进行模糊推理,查询模糊矩阵表进行参数自整定,从而实时调整PID各项参数,加入多因素灰色预测MGM(1,n)解决时滞现象,进行有效的预测作物的需水量,达到对系统的精确灌溉控制。运行测试:该系统与常规PID控制相比,超调量降低了14.68%,系统的调节时间减少了86.62%;比较模糊PID控制,超调量略上升了1.9%,同时调节时间减少了77.71%;并验证了其在水肥浓度和肥量精量控制中,系统响应速度快和实时性好,稳定,大幅度提高了水肥灌溉效果。In this paper,fuzzy control and gray prediction control were designed.The PID control was based on fuzzy rules,query fuzzy matrix table to obtain parameter self-turning.Then it can adjust the parameters of PID in real-time to achieve effectiveness.The running results show that the overshot is reduced by 14.68% and the response time of this system reaches an 86.62% reduction compared with conventional PID control,the overshot has slightly risen by 14.68% and the response time of this system reaches a 77.71% reduction compared with fuzzy PID control.Meanwhile,this system has response speed and good real-time performance,stability through the experiment of water fertilizer concentration and fertilizer consumption precise control,so the water fertilizer irrigation effect is greatly enhanced.

关 键 词：水肥灌溉 PID控制 模糊PID算法 灰色预测控制 

分 类 号：S27[农业科学—农业水土工程] TV93[农业科学—农业工程]