Error sensing strategy for active acoustic structure based on distributed displacement sensors  

作　　者：CHEN Ke'an CHEN Guoyue LI Shuang PAN Haoran 

机构地区：[1]College of Marine, Northwestern Polytechnical University Xi'an 710072 [2]Faculty of System Science and Technology, Akita Prefectural University 84-4 Ebinokuchi, Tsuchiya, Honjo, Akita, 015-0055 Japan)

出　　处：《Chinese Journal of Acoustics》2007年第3期235-245,共11页声学学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (No. 10274060);The authors grateful acknowledge the support of this work by the National Natural Science Foundation of China under grant No. 10274060.

摘　　要：The nearfield error sensing approach, which is one of the key problems encountered in the implementation of active acoustic structure, is investigated theoretically. The basic idea involves a limited number of PVDF film pairs be boned to the surface of the primary panel and secondary panels for measuring the total radiated sound power. In this paper, first, a theoretical model associated with the active acoustic structure is established. Second, the formulae for the shape coefficient of the PVDF pairs are derived based on the acoustic radiation modes and a PVDF sensing model. Finally, a number of computer simulations are performed and the shape of the PVDF pairs and corresponding reduction in the radiated sound power are calculated. The results demonstrate the feasibility of the proposed nearfield error sensing strategy.The nearfield error sensing approach, which is one of the key problems encountered in the implementation of active acoustic structure, is investigated theoretically. The basic idea involves a limited number of PVDF film pairs be boned to the surface of the primary panel and secondary panels for measuring the total radiated sound power. In this paper, first, a theoretical model associated with the active acoustic structure is established. Second, the formulae for the shape coefficient of the PVDF pairs are derived based on the acoustic radiation modes and a PVDF sensing model. Finally, a number of computer simulations are performed and the shape of the PVDF pairs and corresponding reduction in the radiated sound power are calculated. The results demonstrate the feasibility of the proposed nearfield error sensing strategy.

分 类 号：O42[理学—声学]