Research papers
5,883 papers · NASA NTRS, NTSB, FAA CAMI
NASA NTRS · 1,269 NTSB Safety Studies · 12 NTSB Aircraft Accident Reports · 17 Embry-Riddle Scholarly Commons · 1,993
5,883 matches
- arXiv 2024 ARXIV arXiv preprint
Future Pathways for eVTOLs: A Design Optimization Perspective
The rapid development of advanced urban air mobility, particularly electric vertical take-off and landing (eVTOL) aircraft, requires interdisciplinary approaches involving the future urban air mobility ecosystem.
- arXiv 2024 ARXIV arXiv preprint
Aerial Assistive Payload Transportation Using Quadrotor UAVs with Nonsingular Fast Terminal SMC for Human Physical Interaction
This paper presents a novel approach to utilizing underactuated quadrotor Unmanned Aerial Vehicles (UAVs) as assistive devices in cooperative payload transportation task through human guidance and physical interaction.
- arXiv 2024 ARXIV arXiv preprint
An energy-stable phase-field model for droplet icing simulations
A phase-field model for three-phase flows is established by combining the Navier-Stokes (NS) and the energy equations, with the Allen-Cahn (AC) and Cahn-Hilliard (CH) equations and is demonstrated analytically to satisfy…
- arXiv 2024 ARXIV arXiv preprint
Self-Propulsion of floating ice blocks caused by melting in water
We show that floating ice blocks with asymmetric shapes can self-propel with significant speeds due to buoyancy driven currents caused by melting.
- arXiv 2024 ARXIV arXiv preprint
Robust Optimal Safe and Stability Guaranteeing Reinforcement Learning Control for Quadcopter
Recent advances in deep learning have provided new data-driven ways of controller design to replace the traditional manual synthesis and certification approaches.
- arXiv 2024 ARXIV arXiv preprint
A MARL Based Multi-Target Tracking Algorithm Under Jamming Against Radar
Unmanned aerial vehicles (UAVs) have played an increasingly important role in military operations and social life. Among all application scenarios, multi-target tracking tasks accomplished by UAV swarms have received ext…
- arXiv 2024 ARXIV arXiv preprint
Multi-UAV Collaborative Trajectory Planning for Seamless Data Collection and Transmission
Unmanned aerial vehicles (UAVs) have attracted plenty of attention due to their high flexibility and enhanced communication ability. However, the limited coverage and energy of UAVs make it difficult to provide timely wi…
- NASA NTRS 2024 LaRC Contractor Report (CR)
Humans to Mars, But How Many? A Historical Review of Crew Size Determinations for Mars Missions
Three-quarters of a century have passed since the first engineering study of a human mission to Mars in 1948. During that time, dozens of study teams at NASA, its contractors, and other organizations in the U.S.
- arXiv 2024 ARXIV arXiv preprint
A Real-Time System for Scheduling and Managing UAV Delivery in Urban Areas
As urban logistics demand continues to grow, UAV delivery has become a key solution to improve delivery efficiency, reduce traffic congestion, and lower logistics costs.
- arXiv 2024 ARXIV arXiv preprint
Magnisketch Drone Control
The use of Unmanned Aerial Vehicles (UAVs) for aerial tasks and environmental manipulation is increasingly desired. This can be demonstrated via art tasks.
- arXiv 2024 ARXIV arXiv preprint
Cluster-Based Multi-Agent Task Scheduling for Space-Air-Ground Integrated Networks
The Space-Air-Ground Integrated Network (SAGIN) framework is a crucial foundation for future networks, where satellites and aerial nodes assist in computational task offloading.
- arXiv 2024 ARXIV arXiv preprint
Nonlinear control and stability analysis of a unified Tethered UAV-winder system
This paper presents the development of a comprehensive dynamics and stabilizing control architecture for Tethered Unmanned Aerial Vehicle (TUAV) systems.
- arXiv 2024 ARXIV arXiv preprint
Distributed Intelligent System Architecture for UAV-Assisted Monitoring of Wind Energy Infrastructure
With the rapid development of green energy, the efficiency and reliability of wind turbines are key to sustainable renewable energy production.
- arXiv 2024 ARXIV arXiv preprint
Multi-Aircraft Scheduling Optimization in Urban Environments
With the increasing development of intelligent transportation systems and advancements in aviation technology, the concept of Advanced Air Mobility (AAM) is gaining attention.
- arXiv 2024 ARXIV arXiv preprint
Integrating Vision Systems and STPA for Robust Landing and Take-Off in VTOL Aircraft
Vertical take-off and landing (VTOL) unmanned aerial vehicles (UAVs) are versatile platforms widely used in applications such as surveillance, search and rescue, and urban air mobility.
- arXiv 2024 ARXIV arXiv preprint
Rotating convection with a melting boundary: an application to the icy moons
A better understanding of the ice-ocean couplings is required to better characterise the hydrosphere of the icy moons. Using global numerical simulations in spherical geometry, we have investigated here the interplay bet…
- arXiv 2024 ARXIV arXiv preprint
Regional Air Mobility Flight Demand Modeling in Tennessee State
Advanced Air Mobility (AAM), encompassing Urban Air Mobility (UAM) and Regional Air Mobility (RAM), offers innovative solutions to mitigate the issues related to ground transportation like traffic congestion, environment…
- arXiv 2024 ARXIV arXiv preprint
Advancing Operational Efficiency: Airspace Users' Perspective on Trajectory-Based Operations
This work explores the evolution of the Flight Operations Center (FOC) and flight trajectory exchange tools within Trajectory-Based Operations (TBO), emphasizing the benefits of the ICAO's Flight and Flow Information for…
- NASA NTRS 2024 ARC Technical Memorandum (TM)
Safety Assessment of Conformance Monitoring for Situational Awareness in UTM Operations
This report presents a systematic approach to evaluating the safety benefit of utilizing strategic deconfliction and Conformance Monitoring for Situational Awareness to manage the traffic that is comprised of both confor…
- NASA NTRS 2024 JSC Poster
A Passive fuel-Cell Surface power System (PaCeSS)
This effort produces a fully-passive surface power generation capability for fuel cell technology. The concept replaces the actively pumped thermal management of a state of the art (SOA) fuel cell/electrolyzer stack with…
- arXiv 2024 ARXIV arXiv preprint
Model predictive control-based trajectory generation for agile landing of unmanned aerial vehicle on a moving boat
This paper proposes a novel trajectory generation method based on Model Predictive Control (MPC) for agile landing of an Unmanned Aerial Vehicle (UAV) onto an Unmanned Surface Vehicle (USV)'s deck in harsh conditions.
- arXiv 2024 ARXIV arXiv preprint
On the shape of ice stalagmites
The growth of ice stalagmites obtained by the solidification of impacting droplets on a cooled substrate ($-50^{\circ}$C to $-140^{\circ}$C) is investigated experimentally.
- arXiv 2024 ARXIV arXiv preprint
Critical velocity for wake vortex generation behind a plate in a superflow
We study theoretically the critical velocity $U_c$ for quantum vortex generation by a thin plate-shaped obstacle moving through a uniform Bose-Einstein condensate.
- arXiv 2024 ARXIV arXiv preprint
Modeling, Planning, and Control for Hybrid UAV Transition Maneuvers
Small unmanned aerial vehicles (UAVs) have become standard tools in reconnaissance and surveying for both civilian and defense applications.
- NASA NTRS 2024 ARC Poster
Training the Powered-Lift Evaluation Pilot
This poster describes a project to prepare pilots for a study assessing novel aircraft automation concepts for electric Vertical Takeoff and Landing (eVTOL) aircraft using NASA’s Vertical Motion Simulator (VMS).
- NASA NTRS 2024 ARC Technical Memorandum (TM)
Survey of Methods for Assessing Safety Compliance of sUAS BVLOS Operations
To ensure the safety of small Unmanned Aircraft System (sUAS) Beyond Line of Sight (BVLOS) operations in the National Airspace System (NAS), the FAA offers a guideline on how sUAS operators can demonstrate compliance wit…
- arXiv 2024 ARXIV arXiv preprint
Quaternion-based Unscented Kalman Filter for 6-DoF Vision-based Inertial Navigation in GPS-denied Regions
This paper investigates the orientation, position, and linear velocity estimation problem of a rigid-body moving in three-dimensional (3D) space with six degrees-of-freedom (6 DoF).
- arXiv 2024 ARXIV arXiv preprint
Real-time Traffic Simulation and Management for Large-scale Urban Air Mobility: Integrating Route Guidance and Collision Avoidance
Given the spatial heterogeneity of land use patterns in most cities, large-scale UAM deployments will likely focus on specific areas, such as intertransfer traffic between suburbs and city centers.
- arXiv 2024 ARXIV arXiv preprint
CAT-ORA: Collision-Aware Time-Optimal Formation Reshaping for Efficient Robot Coordination in 3D Environments
In this paper, we introduce an algorithm designed to address the problem of time-optimal formation reshaping in three-dimensional environments while preventing collisions between agents.
- arXiv 2024 ARXIV arXiv preprint
Formal Verification of Digital Twins with TLA and Information Leakage Control
Verifying the correctness of a digital twin provides a formal guarantee that the digital twin operates as intended. Digital twin verification is challenging due to the presence of uncertainties in the virtual representat…
- arXiv 2024 ARXIV arXiv preprint
Optimizing Coverage in Convex Quadrilateral Regions with a Single UAV
The integration of unmanned aerial vehicles (UAVs) into next-generation wireless networks has emerged as a promising solution for providing flexible and efficient coverage.
- arXiv 2024 ARXIV arXiv preprint
Monocular Obstacle Avoidance Based on Inverse PPO for Fixed-wing UAVs
Fixed-wing Unmanned Aerial Vehicles (UAVs) are one of the most commonly used platforms for the burgeoning Low-altitude Economy (LAE) and Urban Air Mobility (UAM), due to their long endurance and high-speed capabilities.
- arXiv 2024 ARXIV arXiv preprint
Dynamic Trajectory Adaptation for Efficient UAV Inspections of Wind Energy Units
The research presents an automated method for determining the trajectory of an unmanned aerial vehicle (UAV) for wind turbine inspection.
- arXiv 2024 ARXIV arXiv preprint
TRUST-UP: Trustworthy Reinforcement learning Using Safe Techniques for UAV Pursuit
Reinforcement Learning (RL) enables autonomous aerial vehicles to adapt quickly and make efficient decisions, making it well-suited for dynamic urban air mobility operations.
- Semantic Scholar 2024 Article (Drones)
Urban Air Mobility Communications and Networking: Recent Advances, Techniques, and Challenges
Over the past few years, our traditional ground-based transportation system has encountered various challenges, including overuse, traffic congestion, growing urban populations, high infrastructure costs, and disorganiza…
- Semantic Scholar 2024 Article (Proceedings of the ACM on Interactive Mobile Wearable and Ubiquitous Technologies)
Wind of Change: Investigating Information Visualizations for Passengers and Residents' Perception of Automated Urban Air Mobility
Automated Urban Air Mobility (UAM) is expected to improve passenger transportation but raises concerns about passenger trust and its impact on residents.
- arXiv 2024 ARXIV arXiv preprint
Dynamic Trajectory and Power Control in Ultra-Dense UAV Networks: A Mean-Field Reinforcement Learning Approach
In ultra-dense unmanned aerial vehicle (UAV) networks, it is challenging to coordinate the resource allocation and interference management among large-scale UAVs, for providing flexible and efficient service coverage to …
- arXiv 2024 ARXIV arXiv preprint
Landing Trajectory Prediction for UAS Based on Generative Adversarial Network
Models for trajectory prediction are an essential component of many advanced air mobility studies. These models help aircraft detect conflict and plan avoidance maneuvers, which is especially important in Unmanned Aircra…
- arXiv 2024 ARXIV arXiv preprint
Age of Information Minimization in UAV-Assisted Covert Communication: Trajectory and Beamforming Design
Unmanned aerial vehicles (UAVs) have the potential for time-sensitive applications. Due to wireless channel variation, received data may have an expiration time, particularly in critical situations such as rescue operati…
- arXiv 2024 ARXIV arXiv preprint
The Soft-PVTOL: modeling and control
This paper presents, for the first time, the soft planar vertical take-off and landing (Soft-PVTOL) aircraft. This concept captures the soft aerial vehicle's fundamental dynamics with a minimum number of states and input…
- arXiv 2024 ARXIV arXiv preprint
Characterization of sea ice kinematics over oceanic eddies
Eddies within the meso/submeso-scale range are prevalent throughout the Arctic Ocean, playing a pivotal role in regulating freshwater budget, heat transfer, and sea ice transport.
- arXiv 2024 ARXIV arXiv preprint
Uncertainty Propagation and Minimization for Channel Estimation in UAV-mounted RIS Systems
Reconfigurable Intelligent Surfaces (RIS) are emerging as a key technology for sixth-generation (6G) wireless networks, leveraging adjustable reflecting elements to dynamically control electromagnetic wave propagation an…
- arXiv 2024 ARXIV arXiv preprint
Conjugate Momentum-Based Estimation of External Forces for Bio-Inspired Morphing Wing Flight
Dynamic morphing wing flights present significant challenges in accurately estimating external forces due to complex interactions between aerodynamics, rapid wing movements, and external disturbances.
- arXiv 2024 ARXIV arXiv preprint
Emergent Structure in Multi-agent Systems Using Geometric Embeddings
This work investigates the self-organization of multi-agent systems into closed trajectories, a common requirement in unmanned aerial vehicle (UAV) surveillance tasks.
- arXiv 2024 ARXIV arXiv preprint
Efficient Estimation of Relaxed Model Parameters for Robust UAV Trajectory Optimization
Online trajectory optimization and optimal control methods are crucial for enabling sustainable unmanned aerial vehicle (UAV) services, such as agriculture, environmental monitoring, and transportation, where available a…
- NASA NTRS 2024 ARC Presentation
Part 135 and Business Operator Low Altitude Events: An Analysis of ASRS Reports
This presentation provides an aviation SME's human factors analysis of selected Low Altitude and Controlled Flight Towards Terrain (CFTT) events involving Part 135 and business jet operators as reported to the Aviation S…
- arXiv 2024 ARXIV arXiv preprint
Melting of floating ice cylinders in fresh and saline environments
We experimentally investigated the melting of floating ice cylinders. Experiments were carried out in a tank, with ice cylinders with radii between 5 cm and 12 cm, floating horizontally with their axis perpendicular to g…
- NASA NTRS 2024 ARC Presentation
Part 121 Low Altitude Events: An Analysis of ASRS Reports
This presentation provides an aviation SME's human factors analysis of selected Low Altitude and Controlled Flight Towards Terrain (CFTT) events involving Part 121 air carriers as reported to the Aviation Safety Reportin…
- arXiv 2024 ARXIV arXiv preprint
Energy Optimal Traversal Between Hover Waypoints for Lift+Cruise Electric Powered Aircraft
Advanced Air Mobility aircraft require energy efficient flight plans to be economically viable. This paper defines minimum energy direct trajectories between waypoints for Lift+Cruise electric Vertical Take-Off and Landi…
- NASA NTRS 2024 ARC Presentation
NASA Aviation Safety Reporting System (ASRS) Program Briefing
This presentation provides an overview of NASA's Aviation Safety Reporting System (ASRS).