کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4977096 | 1451847 | 2017 | 12 صفحه PDF | دانلود رایگان |
- Identification of the nonlinear dynamics of micro-speakers.
- Identification of mechanical damping from electrical measurements.
- Analytical formulation of the quasi-linear response of a micro-speaker.
In this study model identification of the nonlinear dynamics of a micro-speaker is carried out by purely electrical measurements, avoiding any explicit vibration measurements. It is shown that a dynamic model of the micro-speaker, which takes into account the nonlinear damping characteristic of the device, can be identified by measuring the response between the voltage input and the current flowing into the coil. An analytical formulation of the quasi-linear model of the micro-speaker is first derived and an optimisation method is then used to identify a polynomial function which describes the mechanical damping behaviour of the micro-speaker. The analytical results of the quasi-linear model are compared with numerical results. This study potentially opens up the possibility of efficiently implementing nonlinear echo cancellers.
Journal: Mechanical Systems and Signal Processing - Volume 88, 1 May 2017, Pages 212-223