Generalized Transport Model Aircraft

Title: Emergency Flight Planning for the Generalized Transport Model Aircraft with Left Wing Damage

A nontrivial fraction of aviation accidents are caused by in-flight damage or failures that reduce performance. Researchers are working to ensure future avionics recognize the impact of damage/failures and guide the aircraft to a safe landing. This thesis presents an end-to-end Adaptive Flight Planner (AFP) for such emergencies and applies it to a damage situation in which a Generalized Transport Model (GTM) aircraft loses a significant fraction of its left wingtip. Trimmed (non-accelerating) flight conditions define the post-damage/failure aircraft flight envelope. A landing site search algorithm is augmented…

Contents

Chapter 1: Introduction
1.1 Related Work
1.1.1 Advanced Flight Management System Architectures
1.1.2 Enabling Technologies
1.1.3 Emergency Flight Management Heritage
1.2 Thesis Objectives and Method
1.3 Thesis Outline
Chapter 2: Aircraft Kinematics and Dynamics
2.1 Aircraft Flight Kinematics and Dynamics
2.1.1 Axes and Angles
2.1.2 Forces and Moments
2.1.3 The Nonlinear Aircraft Model
2.2 The Post-Damage GTM Aircraft Model
2.3 Aircraft Trim State Definition
Chapter 3: Landing Site Search
3.1 Landing Site Search Architecture
3.2 Footprint Generation
3.2.1 Footprint Generation for Loss-of-Thrust
3.2.2 Footprint Generation for Aircraft that Maintain Extended Range Capability
3.3 Feasible Runway Identification and Ranking
Chapter 4: Trajectory Specification as Trim State Sequences
4.1 Trim Analysis
4.1.1 Trim State Computation
4.1.2 Aircraft Trim Database
4.1.3 Trim Control
4.1.4 Trimmed Flight Path Changes
4.2 Transition Analysis
4.2.1 Trim transitions
4.2.2 Interpolated Transitions
4.2.3 LQR-based PID Controller
4.3 Aircraft Kinematic Model
Chapter 5: Trajectory Planning
5.1 Landing Trajectory Design
5.1.1 Two-Step Trajectory Planning
5.1.2 Database Reduction
5.2 Trajectory Planning Part I
5.3 Trajectory Planning Part II
Chapter 6: GTM Case Study
6.1 Database Computation
6.1.1 Full Trim Database
6.1.2 Reduced Trim and Transition Databases
6.2 Emergency Scenarios
6.2.1 Scenario 1
6.2.2 Scenario 2
6.2.3 Scenario 3
6.2.4 Scenario 4
Chapter 7: Conclusions and Future Work
7.1 Conclusions
7.2 Future Work
Bibliography

Author: Tang, Yunshen

Source: University of Maryland

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