Operating keyboard directty operated by operator is normal . finding all indications and operating every loop ( including control module , set data , setting series ? level , output signal ) . alarming and executing all functions 确认由操作员直接操作的功能键操作正常，能调出各种显示，操作每个回路（包括控制模式、设定值、设定串级、输出信号调整等） ，报警确认，执行打印机的各种功能。
Through a lot of simulation experiment and a brief theory inference , we conclude the character and quality of the combination system . the combination system has some great advantages , which is proved by the simulation experiment 主要通过计算机仿真实验的方法并结合了简化的理论推导，验证了此串级- smith混合系统实现的可行性，同时，对串级- smith混合系统的性能进行了深入的讨论。
4 . according to the special characteristic of the question for study , the method of gpc - pid cascade control is discussed , and a simulation experiment is made to show its superiority comparing with conventional pid control 4 、针对课题的具体情况，讨论gpc - pid串级控制的思想，作出了仿真实验，并通过与常用pid控制效果进行的比较，展示了采用gpc - pid串级控制的系统在控制效果上所具有的优越性。
