Cable vibration control is an active research field in the technical literature. Yet, a robust and effective control strategy for cable dynamics is still missing. Indeed, cables exhibit a complex behavior, mainly due to internal resonances and nonlinear couplings. Moreover, most of the control solutions already known in the literature are affected by damper/actuator localization, which significantly impairs their overall control effectiveness. To overcome these drawbacks, the authors have recently proposed a hybrid solution combining wrapped shape memory alloy (SMA) wires and an open-loop actuation. These control solutions have shown promising vibration mitigation capabilities when the motion was essentially dominated by the first in-plane mode. Here, a particular attention is posed to controlling the second in-plane modal amplitude which is known to entail serious control difficulties and proved to be considerably relevant in technical situations. To this end, the effectiveness of the passive (SMA wires), open-loop active and hybrid control solutions are investigated by means of a campaign of laboratory tests. The results extend the previous theoretical/experimental study and confirm the potentialities of the proposed hybrid approach.
HYBRID CONTROL PROCEDURES IN MITIGATING CABLE VIBRATIONS
UBERTINI, Filippo
2010
Abstract
Cable vibration control is an active research field in the technical literature. Yet, a robust and effective control strategy for cable dynamics is still missing. Indeed, cables exhibit a complex behavior, mainly due to internal resonances and nonlinear couplings. Moreover, most of the control solutions already known in the literature are affected by damper/actuator localization, which significantly impairs their overall control effectiveness. To overcome these drawbacks, the authors have recently proposed a hybrid solution combining wrapped shape memory alloy (SMA) wires and an open-loop actuation. These control solutions have shown promising vibration mitigation capabilities when the motion was essentially dominated by the first in-plane mode. Here, a particular attention is posed to controlling the second in-plane modal amplitude which is known to entail serious control difficulties and proved to be considerably relevant in technical situations. To this end, the effectiveness of the passive (SMA wires), open-loop active and hybrid control solutions are investigated by means of a campaign of laboratory tests. The results extend the previous theoretical/experimental study and confirm the potentialities of the proposed hybrid approach.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
