多阶段间歇过程鲁棒异步切换预测容错控制

Robust asynchronous switching predictive fault-tolerant control for multi-phase batch processes

中文关键词  部分执行器故障  异步切换  多阶段间歇过程  模态依赖的平均驻留时间  鲁棒预测容错控制

英文关键词  partial actuator failure  asynchronous switching  multi-phase batch process  model-dependent average dwell time  robust predictive fault-tolerant control

中文摘要

      针对具有异步切换和部分执行器故障的多阶段间歇过程,本文提出一种鲁棒异步切换预测容错控制方法. 首先,建立包含稳定和不稳定情况的异步切换故障模型,并引入输出跟踪误差,得到新型多自由度扩展异步切换故 障模型.基于此扩展模型进行鲁棒异步切换容错控制器的设计,同时,给出保证闭环故障系统在各个阶段渐近稳定 和各个批次指数稳定的充分条件.通过在线求解这些条件,得到各个阶段稳定和不稳定情况的运行时间以及实时的 控制律增益,并利用不稳定情况的时间提前给控制器切换信号,避免系统出现异步切换的情况.最后,以注塑成型 过程为仿真案例,验证了该方法是有效并且可行的.

英文摘要

      In this paper, a robust asynchronous switching predictive fault-tolerant control approach is proposed to solve the asynchronous switching and partial actuator failures of multi-phase batch processes. Firstly, an asynchronous switching fault model, including the stable and unstable cases, is established. Then, an output tracking error is introduced to obtain a novel extended asynchronous switching fault model with multi degrees of freedom. On this basis, a robust asynchronous switching fault-tolerant controller is designed. Meanwhile, sufficient conditions are given to ensure that the closed-loop fault system is asymptotically stable in each phase and exponentially stable in each batch. By solving these conditions online, the running time of the stable and unstable cases and the real-time gains of the control law in each phase are obtained. By providing the switching signal to the controller in advance through the time of the unstable case, the asynchronous switching situation can be avoided. Finally, a simulation of injection molding process is given to verify the effectiveness and feasibility of the proposed approach.