【简答题】图1-16是蒸汽加热器温度控制系统示意,试解答下列问题。 (1) 画出该系统的方块图,并指出被控对象、被控变量、操纵变量及可能存在的干扰。 (2) 若被控对象控制通道的传递函数为G p (S)=5/(7S+4);控制器TC的传递函数为G c (s)=1;调节阀的传递函数为G v (s)=1;测量、变送环节TT的传递函数为H m (s)=1。因是生产需要,出口物料的设定温度从80℃提高到85℃时,物...
【单选题】听力原文:M: Jimmy is going on a journey tomorrow. Shall we have a farewell dinner tonight? W: Do you think it's necessary? You know he'll be away just for a few days and be back next week. Q: What does th...