0 500 1000 1500 2000 2500 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Consistency Diagram Frequency (Hz) Model Iteration cluster pole & vector pole frequency conjugate non realistic 1/condition Figure 6. Consistency Diagram with Final Autonomous Estimates Figure 7. Auto-MAC of Final Autonomous Estimates - Conjugate Poles Figure 6 has been found to be a useful indicator when estimating modal parameters for a dominantly normal mode system. The Auto-MAC plot of the estimated modal vectors shown in Figure 7 shows a nearly perfect correlation between the vectors associated with the positive frequency and the vectors associated with the estimate of its negative frequency (conjugate pair). Mode Frequency, Hz Mode Frequency, Hz Auto−MAC of Reference File 362.34 363.65 557.04 761.12 764.17 1223.00 1224.08 1328.03 1328.79 2019.32 2023.82 2322.20 2322.67 2338.19 −2338.19 −2322.67 −2322.20 −2023.82 −2019.32 −1328.79 −1328.03 −1224.08 −1223.00 −764.17 −761.12 −557.04 −363.65 −362.34 362.34 363.65 557.04 761.12 764.17 1223.00 1224.08 1328.03 1328.79 2019.32 2023.82 2322.20 2322.67 2338.19 MAC Value 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 409
RkJQdWJsaXNoZXIy MTMzNzEzMQ==