1. Exercise 2-1
For the level controlled process, h2 is selected as its controlled variable, and Qin is the main input of the process. Suppose the sectional area of two tanks are A1 and A2. The rates of outlet flow are assumed to satisfy the following equations:
Please obtain the process characteristics by dynamic equations, and build the corresponding SimuLink model.

2. Homework 2-2
For a heater with electricity, the step response data of outlet temperature can be shown as follows. Please determine its characteristic parameters K, T,τ if the span of temperature transmitter is 0 to 50 ℃.
t, min 3 6 9 12 15 18 21 24 27
U, % 60 40
T, ℃
38.7
38.3
38.8
39.0
38.4
37.0
35.3
33.6 30 33 36 39 42 45 48 51 54 57
32.2
31.0
30.2
29.5
29.0
28.6
28.3
28.0
27.9
27.8