Silva-Navarro G., Vázquez-González B., Ortega-Cobos O., Rios-Gutierrez M.

ABSTRACT The paper deals with the identification, analysis and synthesis of a passive and active vibration absorber connected to a mechanical system to attenuate harmonic vibrations with multiple frequency components. The primary system is coupled to a mass-spring vibration absorber and also to a cantilever beam absorber. The overall mechanical system is modeled through modal identification techniques, whose parameters are necessary for the passive designs. Because the overall system is made active with the addition of an external control force, then the open loop dynamics is properly modified with a feedback controller, synthesized via modal control techniques, to improve its robustness properties with respect to frequency variations, inclusive for simultaneous resonant frequencies. Some numerical and experimental results are provided to illustrate the dynamic performance of the passive and active vibration control system on a mechanical platform.