自动门
自动门:控制系统的自适应控制
发布时间:2013/12/22
自动门讯:
控制方法
    对于控制系统的控制方法,要根据控制系统的控制要求(静态和动态)来相应采取
不同的控制策略。最常用的有比例积分微分( PID)控制方法。随着科学技术的突飞猛
进,对工业过程控制的要求越来越高,不仅要求控制的精确性,要注重控制的鲁棒性、
实时性、容错性以及对控制参数的自适应和学习能力。另外,需要控制的工业过程日
趋复杂,工业过程严重的非线性和参数的强耦合性以及不确定性,使许多系统无法用
数学模型精确描述。这样建立在数学模型基础上的经典和现代控制方法将面临空前的
挑战,同时也给新的控制方法的发展带来了良好机遇。下面对其中的比较新的控制方
法作简要介绍。
    (1)自适应控制(Adaptive Control)。自适应控制方法悬经过不断地测量系统的输
入、状态、输出或性能参数,逐渐了解和掌握对象,然后根据所得的信息按一定的设计方
法作出决策,然后去更新控制器的结构和参数以适应环境的变化,达到所要求的控制性能
指标。自适应控制系统应具有三个基本功能t
    1)辨识对象的结构和参数,以更精确地建立被控对象的数学模型。
    2)给出一种控制规律以使被控系统达到期望的性能指标。
    3)自动修正控制器的结构参数。因此,自适应控制系统主要用于过程模型未知或过
程模型结构已知但参数未知且随机的系统。自适应控制系统的类型主要有自校正控制系
统、模型参考自适应控制系统、自寻最优控制系统、学习控制系统等。
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