说明：  一被控对象 ，给定为阶跃给定，幅值为500，设计一个两维模糊PI型控制器，输入语言变量和输出语言变量均取7个值{NB，NM，NS，ZE，PS，PM，PB}，模糊论域为{-6，-5，-4，-3，-2，-1，0，1，2，3，4，5，6}，用matlab编程仿真研究。
(Charged with one object, to set at a given step, the amplitude for the 500, the design of a two-dimensional fuzzy PI-type controller, input linguistic variables and output linguistic variables are taken seven values (NB, NM, NS, ZE, PS , PM, PB), fuzzy domain for (-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6), Simulation programming with matlab .)