An integrated output space partition and optimal control method of multiple-model for nonlinear systems

An integrated output space partition and optimal control method of multiple-model for nonlinear systems
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非线性系统多模型综合输出空间划分及最优控制方法

DOI:
10.1016/j.compchemeng.2018.02.018
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发表时间:
2018-05
影响因子:
4.3
通讯作者:
Xu Zuhua
Xu Zuhua
中科院分区:
工程技术2区
文献类型:
--
作者:
Song Chunyue;Wu Bing;Zhao Jun;Xu Zuhua

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在多模型方法应用于非线性系统时,提出了一种在输出空间中以闭环性能为准则最优划分各线性子系统工作范围的系统方法。在此基础上,提出了一种输出空间划分与最优控制相结合的方法。首先,线性输入输出模型在给定的操作点,然后重新制定为一个混合模型的基础上具有相同的物理意义的每个状态。其次,根据闭环控制指标得到最优状态空间划分。最后,在得到的最优状态空间划分的基础上,利用投影技术得到最优输出空间划分。根据得到的多模型及其最优输出空间划分,设计了混合模型-MPC策略。给出了输出空间划分与最优控制相结合的方法,改善了非线性系统的整体控制性能,并给出了数值仿真结果。
A systematic method for optimally partitioning operating range of each linear subsystem in output space under the criterion of closed-loop performance is initiated, when a multiple model approach is applied to nonlinear systems. As a result, an integrated output space partition and optimal control method is proposed. Firstly, linear input-output models are identified at given operating points and then reformulated as a hybrid model underlying each state having the same physical meaning. Secondly, the optimal state space partition is obtained according to a closed-loop control index. Finally, based on the obtained optimal state space partition, an optimal output space partition is achieved with the projection technique. Furthermore, a hybrid model-MPC strategy is designed according to the obtained multiple-model associated with its optimal output space partition. The integrated output space partition and optimal control method can improve the nonlinear system overall control performance and results of numerical simulation are provided.
DOI: 10.1109/proc.1978.10918
发表时间: 1978-03
影响因子: 20.6
作者:
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