基于模糊状态观测器的单元机组T-S模糊协调控制系统

针对多输入多输出非线性锅炉-汽机系统在负荷工作点大范围变动情况下的协调控制，设计了基于T-S模糊模型的包含模糊状态观测器的渐近跟踪控制系统。该方法将非线性系统在一些选定工况点进行线性化，采用并行分布补偿（PDC）方法，设计模糊渐近跟踪控制器和模糊状态观测器，以汽包压力为前件变量，构造T-S模糊控制系统。引入模糊状态观测器，成功地解决了部分状态变量不能测量的困难。使用线性矩阵不等式（LMI）方法进行了稳定性分析，保证了此控制系统的大范围稳定性。仿真结果验证了这种控制系统能够在大范围运行工况下工作良好。

Takagi-Sugeno Fuzzy Coordinated Control System Based on Fuzzy State Observer for Power Unit

An asymptotic tracking control system with fuzzy state observer based on Takagi-Sugeno fuzzy model is designed for the coordinated control of MIMO nonlinear boiler-turbine system whose operating points vary within wide range. Linear models are first derived from the original nonlinear model on several operating points. Next the fuzzy asymptotic tracking controller and the fuzzy state observer are designed via using the parallel distributed compensation (PDC) technique, and the Takagi-Sugeno fuzzy control system is constructed with the drum pressure as the premise variable. The problem that part of state variables can not be measured is successfully solved by introducing fuzzy state observer. Last the stability analysis is given by means of linear matrix inequality (LMI) approach, and the control system is guaranteed to be stable within the large range. The simulation results demonstrate that the control system works well over a wide region of operation.