1. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with ADVANCED STRUCTURAL DYNAMIC EVALUATION COLLOBORATIVE RESEARCH CENTRE www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre Speaker:

2. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with University Facts and Figures £268m turnover Over 3700 staff £500m of economic impact on the regional economy Over 23,000 Students 8500 Postgraduates Research Income >£50m pa Spin outs and Licensing Deals

3. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Everything Vibrates......the ear of a fly?...a Stradivarius violin?...a vehicle body?

4. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Contact Transducers Disadvantages include: Time consuming cabling Coarse spatial resolution Need to correct local coordinate system Transducer calibration Limited bandwidth Overall, slow and cumbersome

5. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Laser Doppler Vibrometry A method of measuring surfaces Non-contact Can measure shape or movement Very rapid, so can be used for measuring vibration Analogy: acoustic Doppler effect long wavelength low frequency short wavelength high frequency

6. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Why Non-contact LDV? Light Has No Mass –No additional damping –Direct surface measurements High Data Density –Measure complex structures Small and Large Objects –Small spot size –Large area scan capabilities Measure all materials –All types and textures, hot or cold Access –Through windows –Into vacuum or water tanks

7. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with 3D Scanning Vibrometer Full-field x-y scanning with 3 lasers with common control Laser beams intersect at surface Shape geometry is imported or measured Simultaneous measurement of 3 vibration components

8. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Vibration analysis False colour shows vibration variances

9. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Measurements with an Industrial Robot

10. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with ASDEC in action Fixed Sensor arrangement Optimum working distance Automated measurement Automated 3D-alignment

11. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Deflection shape at 38 Hz

12. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Robot Advantages Fully automated & non-contact vibration measurement Benefits for deflection shape and other tests: –Fast measurement –Non-contact –Very accurate Enables new tests –Higher point densities –Material testing Very fast and easy visualisation of results

13. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with Global Monitoring for Environment and Security – G-STEP Space IDEAS Hub Additive Manufacturing Ionic Liquids Demonstrator RAFT (Real-time Air Fingerprinting Technology) Biopolymers Management Training Centre Materials Technology Integration Centre NVH Graduate Pool Airborne Sound Analysis Microscopy Centre Graduate Internships Feasibility Study Grants Systems Modelling services Masters level Placements Training / Master classes / Distance learning Consultancy Research & Development Engineering Services Team Core ASDEC Services

14. www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre in partnership with ADVANCED STRUCTURAL DYNAMIC EVALUATION COLLOBORATIVE RESEARCH CENTRE www.le.ac.uk/engineering www.le.ac.uk/asdec ASDEC Research Centre Thank you