Abstract
This thesis presents methods for robust precision landing of unmanned air vehicles (UAVs) on platforms at sea. Localization methods are proposed for UAV-to-boat state estimation for systems that employ real- time kinematic (RTK) global navigation satellite system (GNSS) and vision sensors. Solutions for GNSS-only are first presented, followed by the fusion of GNSS and vision. The important problem of sensor intrinsic calibration is solved with a novel offline batch estimation approach. Hardware results are presented for all methods. Our calibration of GNSS-to-camera is shown to estimate sensor offsets with millimeter level accuracy. Localization systems are combined with custom state machines that manage the landing attempt via a novel descent cone. This conical threshold enforces a safe and accurate landing. Our landing methods are demonstrated in real-world experiments and achieve consistent accurate landings with error below 10 cm. The fusion of camera and RTK is shown to produce a robust landing system with redundant localization sources.
Degree
MS
College and Department
Ira A. Fulton College of Engineering; Electrical and Computer Engineering
Rights
https://lib.byu.edu/about/copyright/
BYU ScholarsArchive Citation
Jordan, Alexander D., "Robust Localization and Landing for Autonomous Unmanned Aerial Vehicles in Maritime Environments" (2023). Theses and Dissertations. 10063.
https://scholarsarchive.byu.edu/etd/10063
Date Submitted
2023-08-16
Document Type
Thesis
Handle
http://hdl.lib.byu.edu/1877/etd12901
Keywords
navigation, state estimation, autonomous landing, RTK GNSS, fiducial, calibration, sensor fusion, invariant Kalman filter
Language
english