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THE DEVELOPMENT OF A MATHEMATICAL MODEL OF A HYBRID AIRSHIP
by
Alia Farhana Abdul Ghaffar
A Thesis Presented to the
FACULTY OF THE USC VITERBI SCHOOL OF ENGINEERING
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(AEROSPACE ENGINEERING)
December 2012
COPYRIGHT 2012 Alia Farhana Abdul Ghaffar
Object Description
| Title | The development of a mathematical model of a hybrid airship |
| Author | Abdul Ghaffar, Alia Farhana |
| Author email | alia.abdulghaffar@gmail.com;alia.abdulghaffar@gmail.com |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Aerospace Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2012-11-19 |
| Date submitted | 2012-11-19 |
| Date approved | 2012-11-19 |
| Restricted until | 2012-11-19 |
| Date published | 2012-11-19 |
| Advisor (committee chair) | Lockenour, Jerry |
| Advisor (committee member) |
Flashner, Henryk Gruntman, Mike |
| Abstract | The mathematical model of a winged hybrid airship is developed for the analysis of its dynamic stability characteristics. A full nonlinear equation of motion that describes the dynamics of the hybrid airship is determined and for completeness, some of the components in the equations are estimated using the appropriate methods that has been established and used in the past. Adequate assumptions are made in order to apply any relevant computation and estimation methods. While this hybrid airship design is unique, its modeling and stability analysis were done according to the typical procedure of conventional airships and aircrafts. All computations pertaining to the hybrid airship’s equation of motion are carried out and any issues related to the integration of the wing to the conventional airship design are discussed in this thesis. The design of the hybrid airship is also slightly modified to suit the demanding requirement of a complete and feasible mathematical model. Then, linearization is performed under a chosen trim condition, and eigenvalue analysis is carried out to determine the general dynamic stability characteristics of the winged hybrid airship. The result shows that the winged hybrid airship possesses dynamic instability in longitudinal pitch motion and lateral-directional slow roll motion. This is due to the strong coupling between the aerostatic lift from the buoyant gas and aerodynamic lift from the wing. |
| Keyword | hybrid airship; equation of motion; airship; winged airship; dynamic stability analysis; dynamic modeling |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Rights | Abdul Ghaffar, Alia Farhana |
| Access conditions | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@usc.edu |
| Archival file | uscthesesreloadpub_Volume6/etd-AbdulGhaff-1310.pdf |
Description
| Title | Page 1 |
| Full text | THE DEVELOPMENT OF A MATHEMATICAL MODEL OF A HYBRID AIRSHIP by Alia Farhana Abdul Ghaffar A Thesis Presented to the FACULTY OF THE USC VITERBI SCHOOL OF ENGINEERING UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE (AEROSPACE ENGINEERING) December 2012 COPYRIGHT 2012 Alia Farhana Abdul Ghaffar |
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