Solution of module 1

1.3 The system in Fig. P1.3 shows an operator attempting to maintain the speed of a conveyor carrying manufactured parts through a spray booth. When more boxes are placed on the conveyor, it slows down, while fewer boxes allow it to speed up.

(a) Draw a block diagram of the system indicating the principal elements

(b) Redesign an automatic control system without any operator.

图P1-3b人工控制闭环系统控制框图

图 P1-3C 自动控制闭环系统控制框图

Fig P1-1(b) Block Diagram of Manual Closed Loop Control

(V oltage) Measurement

Fig P1-3(c) Block Diagram of Automatic Control System