Harvesting Vibration Energy for Structural Health Monitoring in Aircraft
(0) The concept of harvesting energy is not a new one: there has been an interest in this area for around 10 years.Devices typically use either vibration (rigid body motion) or thermal gradients and can harvest sufficient energy to power telemetry,small devices or to charge a battery or capacitance device.However,for the new generation of aircraft,(both fixed wing and rotating) there is now an urgent need to develop energy harvesting systems in order to provide localised power for sensors in structural health monitoring systems (SHM).By implementing SHM,aircraft manufacturers can benefit from improved safety,reduced maintenance and extended aircraft life.The work presented examines the feasibility of designing an energy harvesting system powered by the vibrations of aircraft panels generated in flight.PZT (lead zirconate titanate) harvesters are bonded to an aluminium alloy panel,representative of an aircraft wing panel which is vibrated across a range of amplitudes (up to±0.2mm) and frequencies (up to 300Hz).By recording voltage and current outputs from each harvester,generated power is calculated which when normalised for area and mass indicates values of up to 7.0 Wm-2 and 2.5Wkg-1 respectively,representing mechanical to electrical energy conversion efficiencies of up to 35％ dependant on frequency of vibration.From these values it is estimated that a harvester area of down to 71 cm2 or mass of as little as 20g is necessary to meet the current minimum power requirements of SHM systems of 50mW.With predicted reductions in sensor power consumption indicating system power requirements in the order of 0.1-1mW,this work shows that piezoelectric energy harvesting has future potential for powering aerospace SHM systems.
Structural health monitoring energy harvesting vibration
C.A.Featherston K.M.Holford B.Greaves
Cardiff School of Engineering,Cardiff University,Queens Buildings,The Parade,Cardiff,CF24 3AA,UK
国际会议
The 8th International Conference on Damage Assessment of Structures(DAMAS 2009)(第八届结构损伤评价国际学术会议)
北京
英文
439-446
2009-08-03（万方平台首次上网日期，不代表论文的发表时间）