噪声与振动控制2016，Vol.36Issue(4)：1-6,6.DOI:10.3969/j.issn.1006-1335.2016.04.001
ASAC系统中少测点条件下的近场声压误差传感策略
Near Field Pressure Error Sensing Strategy under Less Measurement Point Condition for ASAC Systems
摘要
Abstract
It is very important to design a simple and effective error sensing system on the basis of active control strategy. In this paper, aiming at the active control strategy based on pressure acoustic radiation modes, an equivalent near-field pressure error sensing strategy under less measurement point condition is designed in detail. First of all, by analyzing the spatial wave-filtering characteristics of the pressure acoustic radiation modes, the feasibility of the active control strategy based on the pressure acoustic radiation modes is proved. Then, by measuring the pressure distributions at a few measurement points in the near-field measurement surface and solving the underdetermined equations made of modal superposition, the approximate adjoint coefficients of the first K order radiation modes can be obtained. Thus, a near-field pressure error sensing method corresponding to the active control strategy based on the pressure acoustic radiation modes is developed. Finally, a simply supported steel plate in an infinitely large baffle is simulated as an example. The results show that the error sensing strategy proposed is feasible and the approximate adjoint coefficients of the first K order radiation modes are more precise.关键词
声学/误差传感/近场声压/声压声辐射模态/有源结构声控制/少测点Key words
acoustics/error sensing/near-field pressure/pressure acoustic radiation mode/active structural acoustic control/less measurement point引用本文复制引用
苏常伟,朱海潮,毛荣富,苏俊博..ASAC系统中少测点条件下的近场声压误差传感策略[J].噪声与振动控制,2016,36(4):1-6,6.基金项目
国家自然科学基金资助项目 （）
