The focus of this study is to be able to control the air-to-surface missile
throughout the entire flight, with emphasis on the propulsion phase to increase the
impact range of the missile.
A major difficulty in controlling the missile during the propulsion phase is the
important change in mass of the missile. This results in sliding the center of gravity
(cg) point and changing inertias. Moreover, aerodynamic coefficients and stability
derivatives are not assumed to be constant at predetermined ranges / conversely, they
depend on Mach number, angle of attack, and side slip angle. Consequently, as the
change of missile mass, cg point, inertia terms, and stability and aerodynamic
coefficients come together apart from flight operation stages, a great number of
points need to be taken into account when designing the controller. This makes
controlling the missile all the more complicated.
In this thesis, first the equations of motion are derived, in which, mass of the
missile is not assumed constant. Thus, not only the variation of mass but also the
variation of inertias is incorporated in the equations of motion. From the derived
v
equations of motion, a nonlinear inverse dynamics controller that can achieve desired
guidance for a conceptually developed air-to-surface missile has been designed,
tested and verified for a modeled missile with six degrees of freedom. For brevity of
the study, conceptual design and aerodynamic calculations are not given in detail.
Nevertheless, improvements for conceptual design are suggested.
As a result, it is shown that the controller works efficiently: the missile is able
to hit the target with less than 12 m circular error of probability (CEP). Finally,
studies and improvements are proposed.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12608977/index.pdf |
| Date | 01 September 2007 |
| Creators | Gunbatar, Yakup |
| Contributors | Leblebicioglu, Kemal |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
Page generated in 0.0115 seconds