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作 者:陈宁[1] 孙嘉树 罗彪 李彬艳 桂卫华[1] CHEN Ning;SUN Jia-shu;LUO Biao;LI Bin-yan;GUI Wei-hua(School of Automation,Central South University,Changsha 410083,China)
出 处:《控制与决策》2024年第5期1550-1556,共7页Control and Decision
基 金:国家自然科学基金重点项目(62033014)。
摘 要:辊道窑烧结过程是电池正极材料制备工艺的关键,烧结温度的精准控制对提高材料性能、保证产品一致性至关重要.然而,烧结过程通常面临动态信息难以获取、不同温区温度耦合严重以及存在外界干扰等问题,给精准控制辊道窑温度带来了很大的困难.鉴于此,提出一种新的辊道窑温度分散H_∞控制方法.首先,构造一个有界函数来描述温度关联项对当前温区控制性能的最大影响,并根据该有界函数建立温区的极小化极大问题,可将辊道窑温度控制问题转化为更小规模的温区温度控制问题,通过求解所有温区的极小化极大问题的鞍点解得到辊道窑温度H_∞控制策略,实现分散控制;然后,采用一种脱策Q学习算法学习各温区极小化极大问题的鞍点解,获得辊道窑关联系统的温度分散H_∞控制器;最后,基于实际窑炉温度数据进行仿真实验,实验结果表明在干扰存在的情况下,所设计控制器仍然能够精准控制辊道窑温度稳定在设定值上.Roller kiln sintering process is the key to the preparation of cathode materials,and controling kiln temperature precisely is extremely important to reducing energy consumption,improving materials performance and heightening unity of products.However,unknown internal system dynamics,severe energy exchange between different temperature regions and frequent disturbance in the roller kiln make it very difficult to control kiln temperature accurately.A novel decentralized H∞control method of roller kiln temperature is proposed.First,a bounded function is constructed to describe the maxium effects caused by temperature coupling to the control performance of regions in the roller kiln,the minimax problems of different regions can be established based on bounded function above,thus,the large-scale H∞control problem of the whole roller kiln is turned to the small-scale H∞control problem of regions.The target roller kiln temperature H∞control policy can be obtained by solving minimax problems above,so the control method is competeley decentralized.Then,the off-policy Q-learning algorithm is used to learn the roller kiln temperature decentralized H∞control policy.Simulation result shows that the proposed control method can not only control roller kiln temperature to reach the set point precisely,but also overcome the negative effects caused by disturbance.
关 键 词:辊道窑 温度控制 强化学习 脱策Q学习 H_∞控制 分散控制
分 类 号:TP273[自动化与计算机技术—检测技术与自动化装置]
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