DSP-based Sensorless Velocity Observer with Audio Applications in Loudspeaker Compensation

Bai M, Lee CC. DSP-based Sensorless Velocity Observer with Audio Applications in Loudspeaker Compensation. In: AES Convention 118. Audio Engineering Society; 2005. Paper 6424. Available from: https://aes.org/publications/elibrary-page/?id=13140

@inproceedings{Bai2005_13140,
  author = {Bai, Mingsian and Lee, Chih-chung},
  title = {{DSP-based Sensorless Velocity Observer with Audio Applications in Loudspeaker Compensation}},
  booktitle = {AES Convention 118},
  note = {Paper 6424},
  year = {2005},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13140}
}

TY  - CPAPER
TI  - DSP-based Sensorless Velocity Observer with Audio Applications in Loudspeaker Compensation
AU  - Bai, Mingsian
AU  - Lee, Chih-chung
T2  - AES Convention 118
M1  - Paper 6424
PY  - 2005
DA  - 2005/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13140
PB  - Audio Engineering Society
LA  - en
AB  - Cone velocity of loudspeakers has been long recognized as an important parameter for loudspeaker compensation. In the paper, a cone velocity observer that requires no sensor is developed on the basis of state-space estimation. Linear quadratic Gaussian (LQG) theory in conjunction with multirate processing is employed in the design of the observer. The experimental results show close agreement between the velocities obtained by using the proposed technique and the measurement by a laser vibrometer. In addition, the system allows for self-identification and automated filter synthesis. The compensation filters are designed using the quantitative feedback technique (QFT) and implemented on a digital signal processor (DSP). The system is applied to two audio problems in loudspeaker compensation: bass enhancement and room response equalization. Experimental results are discussed.
ER  -