In this paper,a piezoceramic-based wireless sensor network(WSN)was developed for health monitoring of wind turbine blades with active sensing approach.The WSN system has an access point that coordinates the network an...In this paper,a piezoceramic-based wireless sensor network(WSN)was developed for health monitoring of wind turbine blades with active sensing approach.The WSN system has an access point that coordinates the network and connects to a PC to control the wireless nodes.One wireless node functions as an actuator to excite an embedded piezoceramic patch with desired guided waves.The remaining wireless nodes function as sensors to detect and transmit the wave responses at distributed locations.The damage status inside the blade was evaluated through the analysis of the sensor signals.Based on wavelet packet analysis results,a damage index and a damage matrix were developed to evaluate the damage status at different locations.To verify the effectiveness of the proposed approach,a static loading test and a wind tunnel test were performed in the Laboratory of Joint Wind Tunnel and Wave Flume at Harbin Institute of Technology(HIT),China.Experimental results show that damage in wind turbine blades can be detected and evaluated by the proposed approach.展开更多
In this study,multifunctional carbon nanofiber(CNF)paper-based nanocomposite coating was developed for wind turbine blades.The importance of vibration damping in relation to structural stability,dynamic response,posit...In this study,multifunctional carbon nanofiber(CNF)paper-based nanocomposite coating was developed for wind turbine blades.The importance of vibration damping in relation to structural stability,dynamic response,position control,and durability of wind turbine blades cannot be underestimated.The vibration damping properties of the nanocomposite blades were significantly improved and the damping ratio of the nanocomposite increased by 300%compared to the baseline composite.In addition,the CNF paper-based composite exhibited good impact-friction resistance,with a wear rate as low as 1.78×10^(−4)mm^(3)/Nm.The nanocomposite also shows the potential to improve the blockage of water from entering the nanocomposite,being a superhydrophobic material,with a contact angle higher than 160.0◦,which could improve the longevity of a wind turbine blade.Overall,multifunctional nanocomposite coating material shows great promise for usage with wind turbine blades,owing to its excellent damping properties,great friction resistance,and superhydrophobicity.展开更多
基金This research was supported in part by a Texas Higher Education Coordinate Board’s Norman Hackerman Advanced Research Program(NHARP)grant(Contract Number 01980)a US National Science Foundation grant(No.0832089)a US Department of Education GAANN fellowship grant.
文摘In this paper,a piezoceramic-based wireless sensor network(WSN)was developed for health monitoring of wind turbine blades with active sensing approach.The WSN system has an access point that coordinates the network and connects to a PC to control the wireless nodes.One wireless node functions as an actuator to excite an embedded piezoceramic patch with desired guided waves.The remaining wireless nodes function as sensors to detect and transmit the wave responses at distributed locations.The damage status inside the blade was evaluated through the analysis of the sensor signals.Based on wavelet packet analysis results,a damage index and a damage matrix were developed to evaluate the damage status at different locations.To verify the effectiveness of the proposed approach,a static loading test and a wind tunnel test were performed in the Laboratory of Joint Wind Tunnel and Wave Flume at Harbin Institute of Technology(HIT),China.Experimental results show that damage in wind turbine blades can be detected and evaluated by the proposed approach.
基金supported by National Science Foundation(NSF)Nanomanufacturing program under grant number 0757302Federal Aviation Administration Center of Excellence Commercial Space Transportation(FAA COE CST)under grant number 10CCSTUCF002.
文摘In this study,multifunctional carbon nanofiber(CNF)paper-based nanocomposite coating was developed for wind turbine blades.The importance of vibration damping in relation to structural stability,dynamic response,position control,and durability of wind turbine blades cannot be underestimated.The vibration damping properties of the nanocomposite blades were significantly improved and the damping ratio of the nanocomposite increased by 300%compared to the baseline composite.In addition,the CNF paper-based composite exhibited good impact-friction resistance,with a wear rate as low as 1.78×10^(−4)mm^(3)/Nm.The nanocomposite also shows the potential to improve the blockage of water from entering the nanocomposite,being a superhydrophobic material,with a contact angle higher than 160.0◦,which could improve the longevity of a wind turbine blade.Overall,multifunctional nanocomposite coating material shows great promise for usage with wind turbine blades,owing to its excellent damping properties,great friction resistance,and superhydrophobicity.
