Improved LMS Adaptive Algorithm and its Application of Time Delay Estimation in Power Plant

Abstract:

Time delay estimation plays an important role in accuracy of leakage location in industrial boiler furnace. Considering about interference, like strong background noise, reverberation and so on, in boiler furnace, the LMS (least mean square) adaptive filter algorithm should be improved to meet certain environment above .In order to makes the LMS algorithm have the characteristic of fast convergence and small steady state error, an improved, power-normalized and variable step-size discrete cosine transform LMS algorithm is proposed, which combines the power-normalized discrete cosine transform LMS algorithm with the variable step size LMS algorithm that uses sliding forgetting-weighted window . The time delay estimation simulation in the strong-noise environment verifies the improved DCT-MVSS LMS algorithm can achieve good performance.

• Periodical: Applied Mechanics and Materials (Volumes 668-669)
• Pages: 699-702
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.668-669.699
• Online since: October 2014
• Authors: Shi Ping Zhang*, Guo Qing Shen, Lian Suo An
• Keywords: Discrete Cosine Transform, Fast Convergence, Power Normalization, Strong Noise, Time Delay Estimation, Variable Step Size

References

[1] L. S. An, P. Wang, G. S. Jiang: Boiler Tube Leakage Hyperboloidal Location Optimization via Genetic Algorithm. Proceedings of the CSEE. 30(2010), p.21.

[2] L. Wang, G. S. Jiang, L. S. An: Research status of the acoustic detection and location system for boiler tube leakage. Applied Acoustics. 1(2010), pp.1-4.

[3] G. Q. Shen, L. S. An, G. S. Jiang, et al: Simulation of Two-dimensional Temperature Field in Furnace Based on Acoustic Computer Tomography. Proceedings of the CSEE, 27(2007), pp.11-12.

[4] G. Q. Shen, L. S. An, G. S. Jiang, et al: Simulation of Time Delay Estimation in Acoustic Pyrometry in Power Plant Boiler. Proceedings of the CSEE, 27(2007), pp.57-59.