Independent Modal Space Control Technique for Mitigation of Human-Induced Vibrations in Floors

Abstract

AbstractSignificant levels of vibration in civil engineering floors under human-induced excitations often cause annoyance to their occupants. Various Active Vibration Control (AVC) strategies have been investigated in the past for mitigating the effect of such vibrations in some problematic floors; for example, control laws making use of acceleration feedback and velocity feedback schemes. The research presented in this paper aims to demonstrate that the use of the Independent Modal Space Control (IMSC) approach, previously tried and implemented in marine applications, can be invaluable to isolating and controlling specific modes of vibration in civil engineering floors. This approach may prove attractive particularly in floors with very close modes of vibrations where only certain modes prove to be problematic under human-induced excitations. The IMSC technique is implemented in a reduced order model (ROM) of a laboratory structure and two sets of studies with this technique are presented here. In the first study, only the first mode of vibration of the laboratory structure is targeted, while in the second study, both the first and second vibration modes of the laboratory structure are targeted.KeywordsFrequency Response FunctionReduce Order ModelTune Mass DamperActive Vibration ControlCivil Engineering StructureThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.