电液比例压力控制系统的灰色预测模糊控制  

Grey prediction fuzzy control for electro-hydraulic proportional pressure control system

作　　者：王国栋[1] 阎祥安[1] 肖聚亮[1] 郑东强[1] 张承谱[1] 

机构地区：[1]天津大学机械工程学院,天津300072

出　　处：《煤炭学报》2006年第4期525-528,共4页Journal of China Coal Society

基　　金：天津市科技攻关计划重大科技工程项目(05ZHGCGX00500)

摘　　要：针对电液比例压力控制系统的特点,即非线性、动态不确定性等,提出了一种灰色预测模糊控制算法.该控制算法不需要被控对象模型结构的先验信息,仅根据系统实际输出的离散值,利用灰色预测模型,实时进行一步或多步预测,将预测误差与误差变化作为模糊控制器的输入,由模糊控制器对电液比例减压阀出口压力进行控制.该算法自适应性强,计算简单,适合工程应用.在多缸液压同步系统中,压力控制的稳态误差小于3%,表明了该算法的有效性.Aimed at the characteristics of electro-hydraulic proportional pressure control system, such as, non-linear, uncertainty dynamic, and so on, a grey prediction fuzzy control algorithm was proposed. The algorithm doesn＇ t need transcendental information for the model structure of the object controlled. Based on the system output, the grey prediction model can predict future system next or multistep output. The pressure of a electro-hydraulic proportional pressure reducing valve was controlled by fuzzy controller, the predict system output error and the error change were input variables of the fuzzy controller. The algorithm has good adaptability, and it is not only easy to calculate but also fit for being applied to engineering. The static error of pressure control less than 3%, the test results show it is validity for the multi-point hydraulic synchronous system.

关 键 词：电液比例减压阀 灰色预测模糊控制 多缸液压同步系统 

分 类 号：TH137[机械工程—机械制造及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]