TY - JOUR A2 - Dalpiaz, Giorgio AU - Xu, Zhongming AU - Wang, Qinghua AU - He, Yansong AU - Zhang, Zhifei AU - Li, Shu AU - Li, Mengran PY - 2016 DA - 2016/12/15 TI - An Improved Algorithm for Noise Source Localization Based on Equivalent Source Method SP - 8302862 VL - 2016 AB - Near-field acoustical holography (NAH) based on the equivalent source method (ESM) is an efficient method applied for noise source identification. As l2-norm-based regularization cannot produce a satisfactory solution of the ill-conditioned problem in high frequency, the conventional ESM is restricted to relatively low frequency, and the resolution of conventional ESM in middle to high frequency remains a limitation open to investigation. This article presents an algorithm known as improved functional equivalent source method (IFESM), designed to enhance the resolution of conventional ESM. This method is developed in the framework of wideband acoustical holography (WBH) combining with functional beamforming (FB). Through numerical simulations, it is proved that the proposed method can localize noise with higher resolution compared with WBH and conventional ESM, and the ghosts on noise source map can be suppressed effectively. The validity and the feasibility of the proposed method are manifested by experiments including single-source and coherent-source localization. SN - 1070-9622 UR - https://doi.org/10.1155/2016/8302862 DO - 10.1155/2016/8302862 JF - Shock and Vibration PB - Hindawi Publishing Corporation KW - ER -