基于广义预测控制的水箱液位控制算法的研究1.doc

毕 业 设 计 （2011届） 题 目基于广义预测控制的水箱液位控制算法的研究 指导教师 院 系 专 业 　 班 级 　 学 号 　　 姓 名 　 　 二〇一一年　　04 月　14 日 基于广义预测控制的水箱液位控制算法的研究 摘 要 液位在工业生产过程的控制中是很重要的被控量。比如玻璃制品的生产过程中因为玻璃液面是否稳定会直接影响供料机向成型机提供的料滴质量是否稳定，从而间接影响玻璃制品的合格率。水箱液位控制具有大滞后多变量时变性等特点控制需要精确数学模型难取得理想的控制效果。控制，同时具有较好的鲁棒性。 本文通过对水箱控制对象的数学建模，采用广义预测控制算法，设计了一个具有二阶振荡环节的闭环控制系统。基于的仿真结果表明，广义预测控制是一种控制效果好、鲁棒性强、能有效地克服系统滞后的先进控制算法，可应用于不易建立精确数学模型的开环不稳定非最小相位系统。相对于控制算法，广义预测控制结果的动态性能指标、稳态性能指标和鲁棒性更好。 关键词 工业生产 水箱液位 数学建模 广义预测控制 数字控制 Abstract Liquid level in industrial production process control is very important controlled variables. Such as the production process of glass, because the glass surface whether stability will directly influence the material feeding machine to provide the material molding machine quality is stable, thus indirectly affect the passing rate of glass products. The water tank fluid position control system has the big lag, the multivariable, the dynamicity and so on , the ordinary control needs the precise mathematical model, otherwise very difficult to obtain the ideal control effect. The control is one kind along with the adaptive control technological development control algorithm, its most remarkable merit does not need to obtain the precise mathematical model, moreover its dynamic property surpasses the general control, simultaneously has the good robustness. This article through to the water tank controlled members mathematical modeling, uses the generalized predictive control algorithm, designed one to have the second-order oscillating elements closed-loop control system. Indicated based on the simulation result that the generalized predictive control is one kind of control effect is good, robustness strong, can overcome the system lag effectively the a