... umsmszuzrzskscdFtk Vibration Analysis and Control – New Trends and Developments 106 Fig. 8. Block diagram of LQG controller 0.1 1 10 100 1000-200- 150 -100 -50 0 50 Singular Value ... (2003b). Controlling floor vibration with active and passive devices, The Shock and Vibration Digest, Vol. 35, No .5, pp. 347– 65, ISSN 058 3-1024 Hanagan, L.M. (20 05) . Active floor vibration ... 1-870004-34 -5, United Kingdom Vibration Analysis and Control – New Trends and Developments 92 Fig. 16. Walking test on the footbridge. a) Uncontrolled...