一、前言航空、通信等技术的发展,使现代控制理论得到了发展,并且逐步成熟起来。并随之发展了系统辨识、最优控制、自适应控制等技术。但是现代控制理论基于对象的参数模型(如状态方程、传递函数等),对模型要求非常高。在实际过程中,由于环境的影响,对象的模型很难精确得到。就是得到了也往往是时变、非线性的。特别在化工对象中,情况更加复杂。所以,在实际生产过程中很难实施现代控制技术。由于上述的原因,现代控制技术在工业上的应用近年来一直徘徊不前。 I. Introduction The development of technologies such as aviation and communications has brought the modern control theory to development and gradually matured. And along with the development of system identification, optimal control, adaptive control and other technologies. However, modern control theory is based on the parametric model of the object (such as the equation of state, transfer function, etc.), the model is very demanding. In the actual process, the model of the object is difficult to get accurately because of the influence of the environment. That is, it is often time-varying and non-linear. Especially in the chemical industry, the situation is more complicated. Therefore, in the actual production process is difficult to implement modern control technology. Due to the above reasons, the application of modern control technology in industry has been stagnant in recent years.