研究了应用粗糙集理论上、下近似定义对模糊控制规则进行拓展设计粗糙模糊控制器的方法,完成了水箱水位粗糙模糊控制器的设计,并分别进行了模糊控制和粗糙模糊控制仿真研究,研究结果表明该粗糙模糊控制能有效改善模糊控制的性能。 关键词:粗糙集 近似 模糊控制 粗糙模糊控制 控制规则 Abstract: A method of expending fuzzy control rules to design rough fuzzy controller is studied by means of the rough set approximate definition. The rough fuzzy controller for water tank is designed with the method. Simulations on tank have been done for the fuzzy control and the rough fuzzy control respectively. The results show that the rough fuzzy control can improve the performance of fuzzy control . Key words: Rough set,Approximation,Fuzzy control,Rough fuzzy control,Control ruler