自抗扰控制器对一类热工对象的控制性能研究

Study of the Control Performance of First Category Thermotechnical Objects by Making Use of an Active Disturbance Rejection Controller

自抗扰控制器(Active Disturbance Rejection Control-ler,ADRC)在较广泛的一大类不确定系统和系统中存在强干扰的情况下表现出很强的适应性和鲁棒性。基于ADRC的控制能力,研究了用二阶ADRC来控制一类热工高阶大迟延对象的问题。理论分析和数值仿真结果表明,二阶ADRC不但能够有效控制该类对象,而且控制效果也很理想,对其外扰和模型的不确定因素具有较好的适应性和鲁棒性,在一定程度上不存在所谓的模型失配问题,充分体现出非线性控制器的优点,具有一定的工程实用价值。

Active disturbance rejection controllers exhibit a very strong adaptability and robustness in a majority of uncertainty systems and in the presence of a strong disturbance in the systems.Based on the control ability of the ARDC,the problems to employ second order active disturbance rejection controllers to control the first category thermotechnical objects with a high order large time delay were studied.The theoretical analysis and numerical simulation results show that the second order ARDC can effectively control the objects of the kind and the control effectiveness is also very ideal,displaying a relatively good adaptability and robustness to the disturbance from the outside and uncertain factors of the model.To a certain extent,there existed no so-called mismatch problems of the model,fully displaying the merits of non-linear controllers and providing a definite practical value for engineering projects.