1. SSTL APSS09 Student SHM competition 7/13/2009 Shinae Jang

2. SSTL APSS09 Purpose Comprehensive understanding of the smart SHM technology Wireless sensor and software ISHM toolsuite Experimental modal analysis Field experiments

3. SSTL APSS09 Goals Software installation TinyOS installation ISHM toolsuite installation Data measurement on two in-use pedestrian bridges Modal analysis parameter Optimal sensor location to obtain better mode shapes Data acquisition parameters: fs, Nfft, … Output-only system id using either NExT/ERA or FDD Formal presentation * Detailed tasks are listed in the ‘Lab and Competition’ guide

4. SSTL APSS09 Evaluation guideline Accuracy Comparison with reference results Software installation and operation Optimal sensor location Engineering insight Expertise in modal analysis Appropriate sensing and DAQ parameters Discussion Presentation

5. SSTL APSS09 (1) Wireless sensor Sensor Base station node: USB cable, debug board, imote2 with external antenna Sensing nodes: Battery boards, imote2, SHMa sensorboards In total 4 sets will be provided for each group When can we use? Wireless sensor lab Tuesday afternoon ~ Wednesday afternoon

6. SSTL APSS09 Sensing nodes

7. SSTL APSS09 (2) Software installation TinyOS installation (Done) ISHM toolsuite installation Version 1.3.1 One or more laptop should be prepared for the competition

8. SSTL APSS09 (3) Testbeds Suspension bridge (Lake of the Woods)

9. SSTL APSS09 Free vibration tests

10. SSTL APSS09 (4) Testbeds Mahomet Bridge

11. SSTL APSS09 Mounting Use modeling clay between gray weight and the wood plank Laptop

12. SSTL APSS09 Jumping Straight knees Bent knees

13. SSTL APSS09 (4) Test arrangement Mahomet bridge Span on the Sangamon River : Groups 1, 4 (11) Span on the grass : Groups 3, 6, 7 (17) Assistants: Shinae, Hongki, Ryan, Brian P Suspension bridge Groups 2, 5, 8 (17) Assistants: Han, Robin, Chia-Ming

14. SSTL APSS09 Note Groups should coordinate with other groups on the same span for the testing time planning One jumping at a time Other people should be out of bridge not to induce excessive human damping on the bridge

15. SSTL APSS09 (5) Ride arrangement Mahomet Bridge Wednesday 8:30AM at North gate of Newmark Lab. These groups should move to the Lake of the Woods park after data measurement for the picnic. Suspension bridge Wednesday 9:00AM at North gate of Newmark Lab.

16. SSTL APSS09 (6) Presentation Many pictures and figures Everyone should take a role and work together List the individual roles Suggested roles are listed in ‘Field vibration test using wireless sensors’ guide

17. SSTL APSS09 Wireless sensor lab announcement Practice the SHM competition Wireless sensor usage (H/W and S/W) Modal analysis lab with wireless setup Random Vibration and Impact hammer tests With your own parameters 1 st session: 9:45AM – 12:45PM 2 nd session: 1:45PM – 4:45PM