摘要
基于 H∞ 控制理论提出了一种新的状态变量控制方法 ,将大惯性大滞后对象等效成为多容的惯性环节 ,在此基础上设计了无静差的状态反馈控制 ;针对部分状态不可测的问题 ,设计了鲁棒性较强的状态观测器 ;状态反馈和观测器都受到闭环鲁棒性条件限制。现场的实际运行表明 ,这种方法是可行的。图 2参
A new robust state variable controller design is developed in the time domain based on H ∞ theory for reheat steam temperature control. Firstly, the significant delay has been transferred to equivalent high order inertia tache, then an integral action has been taken to achieve zero steady error. Further, the variation of dynamics has been described as parametrical perturbation. At last, a riccati approach has been employed to investigate the robust stability and performance conditions, and a method is proposed to design the robust state feedback and state estimator to satisfy the robustness requirement. The pracitical operation in 300MW unit has proved that such a method is successful. Figs 2 and refs 7.
出处
《动力工程》
CSCD
2000年第5期867-871,共5页
Power Engineering
