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ABSTRACT
ADAPTIVE CONTROL OF GUIDED MISSILES
Tiryaki Kutluay, Kadriye
Ph.D., Department of Aerospace Engineering
Supervisor: Asst. Prof. Dr. Ilkay Yavrucuk
February 2011, 147 Pages
This thesis presents applications and an analysis of various adaptive control
augmentation schemes to various baseline flight control systems of an air to ground
guided missile. The missile model used in this research has aerodynamic control
surfaces on its tail section. The missile is desired to make skid to turn maneuvers by
following acceleration commands in the pitch and yaw axis, and by keeping zero roll
attitude.
First, a linear quadratic regulator baseline autopilot is designed for the control of the
missile acceleration in pitch axis at a single point in the flight envelope. This baseline
autopilot is then augmented with a Direct Model Reference Adaptive Control (DMRAC)
scheme using Neural Networks for parameter estimation, and an L1
Adaptive Control scheme. Using the linearized longitudinal model of the missile at
the design point, simulations are performed to analyze and demonstrate the
performance of the two adaptive augmentation schemes. By injecting uncertainties to
the plant model, the effects of adaptive augmentations on the linear baseline autopilot
are examined.
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Secondly, a high fidelity simulation software of the missile is used in order to
analyze the performance of the adaptive augmentations in 6 DoF nonlinear flight
simulations. For the control of the missile in three axis, baseline autopilots are
designed using dynamic inversion at a single point in the flight envelope. A
linearizing transformation is employed during the inversion process. These coarsely
designed baseline autopilots are augmented with L1 adaptive control elements. The
performance of the adaptive control augmentation system is tested in the presence of
perturbations in the aerodynamic model and increase in input gain, and the
simulation results are presented.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613083/index.pdf |
| Date | 01 February 2011 |
| Creators | Tiryaki Kutluay, Kadriye |
| Contributors | Yavrucuk, Ilkay |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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