Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

16
Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006

Transcript of Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Page 1: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Bond Graph Assignment19.169

Richard Mullen

ME 114

Fall 2006

Page 2: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Problem

Page 3: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Procedure

• A bond graph was made in CAMPG of the system in the problem.

• While all of the values were constants, the source of effort caused by the unbalanced motor is a function of time– SE = m*e*wf*sin(wf*t)

• A simulink model was also created to compare values

Page 4: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Bond Graph

Page 5: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Procedure

• All of the values were put into Matlab and displayed graphically

Page 6: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Simulink Model

Page 7: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Procedure

• All of the values were built into the model and the scopes display the results as a function of time.

Page 8: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Results

• The amplitude of the fluctuating force by analysis is 5.75 N, while the bond graph model gave about 5.8N.

• The amplitude of the displacement of the motor by analysis is 7.10x10-6m, while the bond graph model gave about the same answer of 7.10x10-6m.

Page 9: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Results

The displacement and Momentum of the mass

Page 10: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Results

Zoomed in to see value

Page 11: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Results

The total Force caused by the system on the foundation

Page 12: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Results

Zoomed in portion of the Force on the foundation

Page 13: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Results

• The amplitude of the fluctuating force by analysis is 5.75 N, while the Simulink model settled down at between 5 and 6 N.

• The amplitude of the displacement of the motor by analysis is 7.10x10-6m, while the Simulink model gave about the same answer of 7.10x10-6m.

Page 14: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Results

Force on Foundation over time

Page 15: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Results

Vertical displacement over time

Page 16: Bond Graph Assignment 19.169 Richard Mullen ME 114 Fall 2006.

Conclusion

• The displacement matched up with the calculated value in the example, and the amplitude of the force was almost on for both the CampG and the Simulink models. There was a bit of noise on the force graph for an unknown reason, but it came out very similar. I can see that bond graphs and simulink models can be powerful tools to simulate many situations.