Vibration Data: Ford Focus Shock Absorber Casing

General Information

Contact: Dr Alex Weddell
Institution: University of Southampton
Parameter: Vibration, 3-axis
Specific Location: Shock Absorber Casing (Front LHS) on 1999 Ford Focus 1.6 Petrol
Data Duration: 00d 00h 43m 51s
Sampling Frequency: 1024 Hz
Date Obtained: 31-Oct-2011 09:31:33

Acknowledgment: This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) under grant number EP/G067740/1 "Next Generation Energy-Harvesting Electronics: Holistic Approach"

Detailed Test Information

Original Filename: 2011-10-31 AM Ford Focus F NS Shock Absorber.csv

Test Equipment:

PCB Piezotronics 354C03 tri-axial accelerometer
PCB Piezotronics 480B21 signal conditioner
Keithley KUSB-3102 USB data logger

Calibration Parameters

X: 94.4 mV/g
Y: 102.7 mV/g
Z: 98.0 mV/g

Axis Directions

X: Longitudinal
Y: Transverse
Z: Vertical

Downloads/Links

Raw Data CSV (zipped)
Test Map (KML points)

Graphical Test Results

Peak Acceleration Frequency and Amplitude

FFT at Maximum Vibration Amplitude

X-axis Vibration Characteristics

Y-axis Vibration Characteristics

Z-axis Vibration Characteristics

Automated Analysis

Processing Parameters

Sample rate: 1024 Hz
Duration: 2631 s
Settling time: 10 s
FFT interval: 1 s
FFT length: 1 s
Number of FFTs performed: 2621

Results

Highest mean vibration axis: Z

X-axis

Max Accel Ampl: 87.5 mg_peak at 13.0 Hz at 642 s

Time Peak Accel Ampl above 50% of Max Ampl: 68.0 s (2.6 %)
Peak Accel Freq Range (above 50% of Max Ampl): 13.0 ... 104.0 Hz
Mean Accel Freq (above 50% of Max Ampl): 24.5 Hz

Mean Peak Acceleration Ampl (whole test): 19.7 mg_peak
Mean Peak Acceleration Freq (whole test): 38.7 Hz

Y-axis

Max Accel Ampl: 73.7 mg_peak at 13.0 Hz at 1364 s

Time Peak Accel Ampl above 50% of Max Ampl: 223.0 s (8.5 %)
Peak Accel Freq Range (above 50% of Max Ampl): 12.0 ... 254.0 Hz
Mean Accel Freq (above 50% of Max Ampl): 153.0 Hz

Mean Peak Acceleration Ampl (whole test): 21.9 mg_peak
Mean Peak Acceleration Freq (whole test): 113.7 Hz

Z-axis

Max Accel Ampl: 158.8 mg_peak at 13.0 Hz at 642 s

Time Peak Accel Ampl above 50% of Max Ampl: 35.0 s (1.3 %)
Peak Accel Freq Range (above 50% of Max Ampl): 9.0 ... 19.0 Hz
Mean Accel Freq (above 50% of Max Ampl): 14.0 Hz

Mean Peak Acceleration Ampl (whole test): 30.3 mg_peak
Mean Peak Acceleration Freq (whole test): 17.9 Hz