An improved gradient descent method with multiple variable step sizes for identifying nonlinear parameters of moving-coil loudspeakers is proposed. This method monitors parameters trends during identification and adaptively multiplies or attenuates corresponding step sizes, eliminating the need for manual adjustments. Simulations and experiments reveal that it is as accurate as the fixed step size method and more efficient and robust against initial linear parameter errors.

Authors: Chen, Li; Pan, Keyu; Zhang, Zhaoqi; Feng, Xuelei; Shen, Yong
Affiliations: Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, China; Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, China; Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, China; Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, China; Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, China; Shenzhen Research Institute of Nanjing University, Shenzhen, China(See document for exact affiliation information.)
JAES Volume 69 Issue 3 pp. 182-190; March 2021
Publication Date: March 9, 2021

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