Dynamic Measurements from a Laboratory Truss in Healthy and Damaged Conditions

Eleven different test trials are conducted to do structural health monitoring and damage detection algorithms validation. Each test trial contains shaker input and acceleration output measurements (time history data) from the truss in the healthy case and the corresponding damaged case.

Each trial contains the next:

Unprocessed data files:
1) Matlab files:
- group1_u.mat ~ group11_u.mat (undamaged)
- group1_d.mat ~ group11_d.mat (damaged)
2) Csv files:
- group1_u_raw.csv ~ group11_u_raw.csv (undamaged)
- group1_d_raw.csv ~ group11_d_raw.csv (damaged)

Converted data files:
- group1_u.csv ~ group11_u.csv (undamaged)
- group1_d.csv ~ group11_d.csv (damaged)

Each group has two bays, and the group starts from the left (please see Sensor setup.jpg at Documentation). For instance, group 2 consists of elements 7 ~ 15 (please see truss.pdf at Documentation).

Each data file has 14 columns, the first is for time (in sec), the second is for excitation input, and the rest of them are acceleration outputs. These 12 sensors for accelerations are illustrated in Sensor setup.jpg. at the Documentation. The input is applied vertically to node 9 (see truss.pdf at the Documentation for node numbering).

The unit of input and output data in the unprocessed data files is volt.

The unit of input and output data in the converted data files is lb (shaker) and g (accelerometer).
The converted data are obtained from the unprocessed data.

National instrument DAQ system and a labview program were used to record the data. The sampling frequency is 256Hz.

For more detailed description, see NSEL.Report.011.pdf at the Documentation.