机炉协调控制系统的鲁棒性能分析

Robustness analysis of a boiler-turbine control system

为克服传统鲁棒控制算法的保守性,提出一种概率范式下评价参数不确定控制系统鲁棒性能的方法。该方法能以累积频率曲线的形式直观地对任意性能水平下不同控制系统的鲁棒性能进行比较;同时,针对机炉协调控制系统设计一种鲁棒反馈线性化控制器,并运用上述评价方法将其与传统的精确反馈线性化控制器的鲁棒性能进行对比。仿真结果显示鲁棒反馈线性化控制器具有更为优越的鲁棒性能,同时验证了所提出的控制系统鲁棒性能评价算法的有效性。

A probabilistic method was developed to evaluate the robustness of control systems with parameter uncertainties to overcome the conservative designs of traditional robust control algorithms. The method quantifies the system robustness based on cumulative frequency curves. The robustness of a robust feedback linearization controller designed for a boiler-turbine system was then compared with an exact feedback linearization controller. The results validate the effectiveness of the method and show that the robust feedback linearization controller is more robust.