基于特征结构配置的参数化结果,给出了实现结构振动系统模态解耦的充要条件,导出了期望的反馈增益阵及闭环特征向量矩阵的全体参数化表示。该方法在实现模态解耦的同时,还提供了全部自由度,可用来实现系统设计中某些性能要求。该方法直接基于原系统的参数矩阵,便于工程应用。三级质量弹簧系统的实例表明该方法有效。 The necessary and sufficient conditions for the modal decoupling of the structural vibration system are given based on the parametric results of the feature configuration. The parametric representation of the desired feedback gain matrix and the closed-loop eigenvector matrix is ​​derived. This method not only achieves the mode decoupling, but also provides all degrees of freedom and can be used to achieve certain performance requirements in system design. The method is based on the original system parameter matrix, easy to engineering applications. An example of a three-stage mass spring system shows that the method is effective.