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在控制系统中，其稳态状态方差和闭环极点是表征系统稳态及暂态性能的2个重要指标。一个理想的工程控制系统除了需具有良好的稳态特性外，还需要具有良好的暂态性能以保证过渡过程的品质要求。协方差控制理论在兼顾系统暂、稳态性能指标要求的应用中具有良好的实用效果。该文讨论连续系统在误差方差以及闭环极点配置区约束下，动态系统输出反馈控制器的设计问题，通过对反馈增益阵G的研究分析，给出了此类控制器的存在条件及相关性质。
In the control system, the steady-state variance and the closed-loop pole are two important indexes to characterize the steady-state and transient performance of the system. An ideal engineering control system in addition to having good steady-state characteristics, but also need to have good transient performance to ensure the quality of the transition process requirements. The covariance control theory has good practical effects in the application of both the system temporary and steady-state performance index requirements. This paper discusses the design problem of dynamic system output feedback controller under the constraint of error variance and closed-loop pole placement area. The existence conditions and related properties of the output feedback controller G are given through the research and analysis of feedback gain matrix G.