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本文讨论了PID调节规律和前馈一反馈等常规调节在一定条件下的线性二次型最优控制。以化工过程常遇到的一阶、二阶和具有纯滞后的对象为例,分别叙述了在改变给定值和外界干扰作用下,对于不同二次型目标函数的最优控制作用与PID调节规律、前馈一反馈调节规律、串级调节规律和Smith预估补偿器等的关系。
This paper discusses the linear quadratic optimal control of the conventional regulation such as PID regulation and feedforward-one feedback under certain conditions. Taking the first order, the second order and the objects with pure hysteresis encountered in the chemical process as examples, the optimal control action and PID adjustment for different quadratic objective functions under the influence of changing the given value and external disturbance are described respectively. Law, feedforward-feedback regulation, cascade regulation and Smith predictive compensator and so on.