中文说明：被控对象为二阶函数，采样时间为1ms，采用z变换进行离散化。利用所设计的模糊系统进行PI控制参数的整定。取Kp、Ki的初始值为零。
English Description：
The controlled object is a second-order function, the sampling time is 1ms, and Z transform is used to discretize. The designed fuzzy system is used to adjust the PI control parameters. Take the initial values of KP and Ki as zero.