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1. Miao, Tianlei. Generation of a full-envelope hydrodynamic database for hydrobatic AUVs : Combining numerical, semi-empirical methods to calculate AUV hydrodynamic coefficients.

Degree: Naval Systems, 2019, KTH

The next generation of Autonomous Underwater Vehicles (AUV) can impact our observation of the world. The flight simulation and full-envelope hydrodynamics modeling can improve the performance of AUVs in terms of control, navigation and positioning. In order to achieve agile maneuverability, a more accurate database of full-envelope hydrodynamic coefficients is supposed to be generated. Two semi-empirical methods, Jorgensen and DATCOM, and two numerical method, Computational Fluid Dynamics (CFD) and XFLR5 are used to push the boundaries of hydrodynamic coefficients: lift, drag and moment coefficients for flight-style AUVs at the Swedish Maritime Robotics Center (SMaRC). A comparison of different approaches and tools, and an analysis of the most appropriate approaches for different regions of a defined maneuver has been conducted in this thesis. A data confidence level was proposed as a way to estimate the accuracy of the data and a structured database was built in terms of data confidence level. Different components of the AUV such as the hull body and wings were analyzed separately. The new database is input to a 3DOF Simulink model and the 6DOF SMaRC hydrobatics simulator for flight dynamics simulations. Simulations show that the new database has a good applicability.

Subjects/Keywords: AUV; hydrodynamic coefficients; database; Jorgensen method; DATCOM method; CFD; Simulink simulator; data confidence level; Vehicle Engineering; Farkostteknik

…buildup was performed in MATLAB/Simulink. 4.1 Jorgensen’s Method Jorgensen presented a… …method 15-180 Jorgensen method with different base-drag coefficients 0-20 Multhopp’s method… …we also implement Jorgensen’s method in our calculation, but with variations: 1. Jorgensen… …For higher angle of attack, we use the Jorgensen method with refined definitions of axial… …Methods used include: Analytical and Semi-Empirical methods (ASE) - Jorgensen’s method… 

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APA (6th Edition):

Miao, T. (2019). Generation of a full-envelope hydrodynamic database for hydrobatic AUVs : Combining numerical, semi-empirical methods to calculate AUV hydrodynamic coefficients. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262038

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Miao, Tianlei. “Generation of a full-envelope hydrodynamic database for hydrobatic AUVs : Combining numerical, semi-empirical methods to calculate AUV hydrodynamic coefficients.” 2019. Thesis, KTH. Accessed August 09, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262038.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Miao, Tianlei. “Generation of a full-envelope hydrodynamic database for hydrobatic AUVs : Combining numerical, semi-empirical methods to calculate AUV hydrodynamic coefficients.” 2019. Web. 09 Aug 2020.

Vancouver:

Miao T. Generation of a full-envelope hydrodynamic database for hydrobatic AUVs : Combining numerical, semi-empirical methods to calculate AUV hydrodynamic coefficients. [Internet] [Thesis]. KTH; 2019. [cited 2020 Aug 09]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262038.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Miao T. Generation of a full-envelope hydrodynamic database for hydrobatic AUVs : Combining numerical, semi-empirical methods to calculate AUV hydrodynamic coefficients. [Thesis]. KTH; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262038

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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