摘要
针对化工过程常见的积分和不稳定时滞对象,基于改进的史密斯预测控制提出了两自由度控制方案。首先根据鲁棒控制理论H2最优性能指标设计设定值跟踪控制器,然后在分析稳定性和抗扰性的基础上设计了扰动抑制控制器,设定值跟踪控制器和扰动抑制控制器可通过性能参数独立调节和优化。同时针对存在的乘性不确定性过程分析了系统的鲁棒稳定性。最后通过仿真实例验证了该控制方案的有效性。
A two-degree-of-freedom control structure was proposed for integrating and unstable processes with time delay based on modified Smith predictor control.Firstly,the set point tracking controllers were designed according to the robust control H2 performance specification.Then the controller for disturbance rejection was designed on the basis of analysis of stability and disturbance rejection.The controllers for set point response and the controller for disturbance could be adjusted and optimized independently.Meanwhile,the robust stability was analyzed in the presence of the process multiplicative uncertainty.Simulation example demonstrates the validity of the proposed control scheme.
出处
《化工自动化及仪表》
CAS
北大核心
2010年第11期28-30,共3页
Control and Instruments in Chemical Industry
关键词
改进史密斯预估控制
积分和不稳定对象
时滞
H2性能指标
抗扰动
modified Smith predictor control
integrating and unstable process
time delay
H2 performance specification
disturbance rejection
