1. Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu
Engineering 25
Problem 9.2 by SimuLink
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer

2. Start SimuLink

3. Construct Model - 1 Start New Model
Summing-Nodes & Gain in MATH OPERATIONS sublibrary

4. Construct Model - 2 Set Gain to 1/5 by 2X-Clicking Gain Block
Find Integrator Block in CONTINUOUS SubLibrary

5. Construct Model - 3
Set 1st order IC [dy/dt]t=0 to 3 by 2X Click on Itegrator block

6. Construct Model - 4 Add dy/dt Integrator Block
Set 0th order IC y(0) to 5

7. Construct Model - 5 Add the 3 & 7 “FeedBack” Gain Blocks
Use: FORMAT → FlipBlock

8. Construct Model - 6 Add Scope from SINKS sublibrary
Add Sine Forcing Fcn from SOURCES sublibrary

9. Construct Model - 7 Set Value of Gain in FeedBack Gain Blocks
Adjust SIGNS in Summing Nodes by 2X Click

10. Construct Model - 8
The Complete Simulation Model

11. Construct Model - 9
Set Simulation Parameters using Simulation PullDown

12. Construct Model - 10
Run Simulation and Show on Scope

13. Construct Model - 11
The sqrt(t) Forcing Fcn Case

14. Construct Model - 12
For Constant Forcing Function case, f(t) = 7.7, Set Amplitude in sine block to 0

15. Construct Model - 13
Run Simulation for f(t) = 7.7

16. Construct Model - 14
Send OutPut of Simulation to WorkSpace for Plotting
2X Click Block to Set Parameters

17. The WorkSpace Plot

18. For Analytical Solns f(t) = 7.7 f(t) = 50sin(4.3t) + 7.7
See Hand Solution
f(t) = 50sin(4.3t) + 7.7
Wait for Chp 10
See Files
P9_2_Symbolic_Soln_0711.m
P9_2_Symbolic_Soln_Constant_Eval_0711.m