Dissertation > Excellent graduate degree dissertation topics show

Acoustic Location Based on Time Delay Estimation

Author: WangWei
Tutor: NiMing
School: National University of Defense Science and Technology
Course: Underwater Acoustics
Keywords: TDE Cross Array HHT Multi-array
CLC: TB52
Type: Master's thesis
Year: 2010
Downloads: 152
Quote: 1
Read: Download Dissertation

Abstract


TDE-based passive acoustic location is one of the most important methods in the acoustic location field. To improve its performance, TDE and location algorithm as the two key techniques were studied in this dissertation.Four sorts of TDE algorithm were summarized. Each of character was demonstrated by theoretical deduction. Each excellence and suitable applying condition was verified by simulation and experiment. As for the line spectral feature of most target, HHT was used in feature extraction and time-frequency analysis. Moreover, one high precision algorithm was brought forward to solve the low frequency line spectrum TDE. It can remedy the inferior position of other algorithm in the line spectrum TDE, and has similar performance in broad band signal TDE.Four-element cross array and five-element cross array were discussed as location algorithm, and target location accuracy analyzed by MATLAB program. It replaced the approximate expressions which were effective only in far-forth condition. Clarified by simulation and experiment result, five-element cross array is more excellent than four-element cross array in distance accuracy and pitching angle accuracy. four-element cross array is more excellent than five-element cross array in azimuth angle accuracy in some condition. Multi-array long-distance target location algorithm based on hyperbola-cross was discussed. It combined with average probability density data fusion algorithm to dispose maritime test data.

Related Dissertations

  1. Over-voltage Identification of Transmission Line Based on Hilbert-Huang Transformation,TM866
  2. Sound source directional mobile robot Methods,TP242
  3. Noisy environments Microphone Array Speech Enhancement Technology,TN912.35
  4. Based on flow characteristics of Campus Network Performance Analysis and Research,TP393.18
  5. The overloaded train car and Unbalanced contained condition monitoring system,TP277
  6. Effect of Zirconium Tungstate on the Thermal Expansion Properties of Carbon Fiber Reinforced Polymer,TB332
  7. AT power supply to traction network fault location,TM922.3
  8. Study on Fault Location of High Voltage Transmission Line Based on Hilbert-huang Transform,TM762.25
  9. Research on the Analysis for Low Frequency Oscillation in Power Systems,TM712
  10. DOA estimation of coherent sources,TN911.7
  11. Resonant grounding system traveling wave fault line selection Positioning Method,TM862
  12. Spiral bevel gear meshing vibration detection system design and research,TH825
  13. The Analysis of Heart Sound Signal Based on Wavelet and Hilbert-Huang Transform,TN911.7
  14. The timing jitter Research HHT - based algorithm,TN914
  15. The HHT endpoint suppression method,TN911.7
  16. Natural incentive under Structural Health Monitoring Research on Signal Processing,TN911.7
  17. Research and Implementation on Technologies of Random-distributed Antennas Arraying,TN927
  18. Research on the Method of Hoist Head Sheave Bearing Fault Diagnosis Based on HHT,TH165.3
  19. Research on Online Analysis Methods of Low-Frequency Oscillations in Power Systems,TM712
  20. Tengchong County District Pipe Jacking under complex environment blasting vibration safety research,TU992.24

CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Acoustic measurements
© 2012 www.DissertationTopic.Net  Mobile