CIFER®-MATLAB Interfaces: Development and ... - Cal Poly

Figure 4.2: SISO Mass-Spring-Damper System
The system was modeled in Simulink by attaching a custom chirp signal generator to the transfer
function as shown in Figure 4.3. The chirp generator was written to provide a frequency sweep as
input. The spring constant K was set to 7, and variables M, and b set to 0.3 and 0.1, respectively.
These values correspond to a natural frequency of 4.83 rad/s and a damping of 0.035.
Figure 4.3: Mass-Spring-Damper Simulink Block Diagram
The results of the simulation, Figure 4.4 below, were collected and formatted into a file readable
by CIFER ® . The time history then made the basis for new CIFER ® case that was created entirely
in MATLAB. The script that set up the case can be found in Appendix H.
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