提出了一种改进的分散控制器结构来加强多变量系统的抗扰性能。首先，基于相对标准增益矩阵得到一个最佳的回路配对，然后用相对干扰增益确定耦合作用对哪些回路的干扰抑制有积极作用，最后用一个指标确定需要增加哪些控制器来抵消不利于抗扰的耦合作用。确定控制器结构以后，用等效传递函数设计控制器。2个仿真实例证明，本方法对于提高多变量系统抗扰性能是有效的。%A modified decentralized control structure is proposed to improve the performance of multivariable process for disturb-ance rejection by using the advantageous interactions and counteracting the disadvantageous interactions .First ,the relative nor-malized gain array (RNGA) is applied to obtain the best loop pairing .Then ,the relative load gain (RLG) is used to identify which interactions are useful for disturbance rejection .Finally ,an index is calculated to determine the controllers needed to add to counteract the disadvantageous interactions .The effective transfer function method is used to design controller after control struc-ture is selected .Two simulation studies are given to demonstrate the proposed method is effective for multivariable systems′dis-turbance rejection .
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