www.le.ac.uk/engineering asdec research centre in partnership with advanced structural dynamic...

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

ADVANCED STRUC TURAL DYNAMI C EVALUATI ON COLLOBORAT I VE RESEARCH CENT RE

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research CentreSpeaker:

www.le.ac.uk/engineeringwww.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

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

Everything Vibrates...

... the ear of a fly?

... a Stradivarius violin?

... a vehicle body?

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

Contact TransducersDisadvantages include:• Time consuming cabling• Coarse spatial resolution• Need to correct local coordinate system• Transducer calibration• Limited bandwidth• Overall, slow and cumbersome

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

Laser Doppler VibrometryA 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 wavelengthlow frequency

short wavelength high frequency

www.le.ac.uk/engineeringwww.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

www.le.ac.uk/engineeringwww.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

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

Vibration analysis

False colour shows vibration variances

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

Measurements with an Industrial Robot

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

ASDEC in action• Fixed Sensor arrangement• Optimum working distance• Automated measurement• Automated 3D-alignment

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

Deflection shape at 38 Hz

www.le.ac.uk/engineeringwww.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

www.le.ac.uk/engineeringwww.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

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research Centre in partnership with

ADVANCED STRUC TURAL DYNAMI C EVALUATI ON COLLOBORAT I VE RESEARCH CENT RE

www.le.ac.uk/engineeringwww.le.ac.uk/asdec

ASDEC Research CentreThank you