Electromechanical impedance measurements using the Analog Devices AD5933
Bruno Klopott · Harvard Dataverse · 2015
Summary Raw and reorganised data of the electromechanical impedance of an Macro-Fiber Composite transducer bonded to a 6082 aluminium beam. The experiment was conducted over a range of damage levels (4) and temperatures (5, from 0°C to 40°C). A total of 320 measurements were carried out. Data was acquired using the Analog Devices AD5933 impedance analyser. Measurements were carried out in an environmental test chamber at the Surrey Space Centre, UK. Details This dataset contains raw output as well as aggregated data with the measurement software provided with the Analog Devices AD5933 evaluation board. All data in the dataset is 'tidy' (each variable forms a column, each observation forms a row). A total of 320 measurements are contained in this dataset - 4 damage levels and 5 temperature values, 16 iterations each. Multi-point calibration was performed with a 1% tolerance 470 Ohm resistor. A 1% tolerance 470 Ohm resistor was also placed in the Rfb location on the AD5933 evaluation board. The frequency sweep start frequency was 35 kHz, with delta frequency of 64 Hz and 512 increments. The internal oscillator of 16.776 MHz was used. The output excitation range was 1 V p-p. DDS settling time cycles was set to X2 (double). The experiment was conducted in an environmental test chamber, model WIR 12-30 produces by Design Environmental in 2002 for the Surrey Space Centre, UK. The chamber conforms to EN 50081-1 electromagnetic compatibility standards and has received periodic calibrations. Further information available upon inquiry (and in a forthcoming publication). Aggregated data The aggregated data contains the following variables: dam damage level - factor with 4 levels d0 ... d3 temp temperature in degrees Celsius iter interation number freq frequency mag magnitude of complex impedance arg argument (phase) of complex impedance real real part of complex impedance (resistance) imag imaginary part of complex impedance (reactance) Raw data Raw data in csv format contains the following variables: Frequency Impedance magnitude of complex impedance Phase argument of complex impedance, in degrees Real internal real register value Imaginary internal imaginary register value Magnitude magnitude of complex impedance before multiplying by the gain factor The filenames contain three metadata fields, separated with a dash: damage level (factor) temperature (degrees Celsius) iteration number Example: file d3-30-15.csv represents data acquired with damage level d3, at temperature of 30 degrees Celsius, iteration no. 15.