浊度大时滞过程的预测自抗扰控制器设计

发布时间：2018-10-23 16:01

【摘要】：待滤水浊度过程涉及复杂的物理、化学反应,具有明显的大时滞、不确定性和干扰多等特点,一直是制水行业公认的难控系统.针对其干扰多和不确定性特点,采用自抗扰控制来主动实时估计扰动并进行补偿;针对其大时滞特点,采用预测控制对输出提前预报来弥补大时滞系统中的信息不及时,从而得到一种既具信息预估又具主动补偿总扰动的预测自抗扰控制器.本文重点分析了预测自抗扰控制器的性能,给出了时滞系统在该控制器作用下的开环频率参数求取方法及简单实用的参数整定公式,最后将其与几种常见控制器进行了仿真比较.仿真结果表明:预测自抗扰控制器具有良好的抗扰恢复能力和设定值跟踪能力,且参数整定容易,具有简单、好用且有效等特点,为该控制器的工业化应用提供了积极的指导作用.
[Abstract]:Turbidity process involves complex physical and chemical reactions and has many characteristics such as large time delay, uncertainty and interference, etc. It has been recognized as a difficult control system in water production industry. In view of its characteristics of multiple disturbances and uncertainties, active real-time disturbance estimation and compensation is achieved by using active disturbance rejection control, and predictive control is used to predict the output in advance to compensate for the untimely information in the large time-delay system. Thus a predictive active disturbance rejection controller with information prediction and active compensation for total disturbance is obtained. In this paper, the performance of predictive active disturbance rejection controller is analyzed, and the method of obtaining open-loop frequency parameters of time-delay systems under the action of the controller and the simple and practical parameter tuning formula are given. Finally, it is simulated and compared with several common controllers. The simulation results show that the predictive ADRC has good anti-disturbance recovery ability and set value tracking ability, and the parameters are easy to set, simple, easy to use and effective. It provides a positive guidance for the industrial application of the controller.
【作者单位】：广东技术师范学院自动化学院;克利夫兰州立大学先进控制技术中心;
【基金】：广东省自然科学基金项目(S2013010015007) 广东省公益研究与能力建设项目(2015A010104010)资助~~
【分类号】：TP273

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