不稳定对象的PID控制  

PID control of unstable plants

作　　者：王广雄[1] 袁欣[1] 何朕[1] 

机构地区：[1]哈尔滨工业大学控制工程系,黑龙江哈尔滨150001

出　　处：《控制与决策》2002年第5期611-613,共3页Control and Decision

摘　　要：对于不稳定对象的控制 ,常规的稳定裕度和性能指标已不适用。为此讨论了控制不稳定对象时的下幅值裕度和相位裕度的取值范围 ,给出了典型的灵敏度函数 ,并讨论了用 H∞ 设计时性能权函数的选择问题。The traditional stability margins and performance specifications are no longer suitable for controlofunstableplantsBasedonthedamping analysis and tradeoffs concerning system stiffness versus the bandwidth, the appropriate ranges of the lower gain margin and phase margin for control of unstableplantsarepresented.Thetypicalsensitivity function is given. The resulting performance specifications can be applied to PID control. The problem of selecting performance weighting function in the H ∞ design is also discussed.

关 键 词：不稳定对象 PID控制 H∞设计 稳定裕度 性能指标 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]