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航空发动机解耦PI控制器设计方法

DOI: 10.13700/j.bh.1001-5965.2013.0312, PP. 449-454

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Abstract:

在离散时间域下,研究了航空发动机的最优PI控制器设计问题.首先,提出一种多回路耦合的通用PI控制器设计方法,基本思想是构造Lyapunov函数以保证闭环系统稳定,且性能在给定评价指标下最优,结论转化为线性矩阵不等式(LMI,LinearMatrixInequality)描述,用现有工具箱很容易求解.随后,在通用控制器设计方法的基础上,考虑当前国内工程应用情况,针对大推力涡扇航空发动机的模型特性和控制要求,通过构造特殊形式的PI控制器以及矩阵变量,得到其多回路解耦的PI控制器设计方法,并讨论了性能评价指标矩阵的选取对控制器设计结果的影响,给出了指标矩阵的推荐结构.最后,以某型航空发动机控制为例,验证了所提方法的有效性.

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