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Smart Structures and Systems
  Volume 10, Number 3, September 2012, pages 193-207
DOI: http://dx.doi.org/10.12989/sss.2012.10.3.193
 


Energy-efficiency enhancement and displacement-offset elimination for hybrid vibration control
Kanjuro Makihara

 
Abstract
    New insights into our previously proposed hybrid-type method for vibration control are highlighted in terms of energy analysis, such as the assessment of energy efficiency and system stability. The hybrid method improves the bang-bang active method by combining it with an energy-recycling approach. Its simple configuration and low energy-consumption property are quite suitable especially for isolated structures whose energy sources are strictly limited. The harmful influence of the external voltage is assessed, as well as its beneficial performance. We show a new chattering prevention approach that both harvests electrical energy from piezoelectric actuators and eliminates the displacement-offset of the equilibrium point of structures. The amount of energy consumption of the hybrid system is assessed qualitatively and is compared with other control systems. Experiments and numerical simulations conducted on a 10-bay truss can provide a thorough energy-efficiency evaluation of the hybrid suppression system having our energy-harvesting system.
 
Key Words
    hybrid-type vibration control; semi-active vibration suppression; piezoelectric; energy-transfer; switching control
 
Address
Kanjuro Makihara: Department of Aerospace Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, Aoba-ward, Sendai 980-8579, Japan
 

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