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View article: Safety-Aware Pre-Flight Trajectory Planning for Urban UAVs with Contingency Plans for Mechanical and GPS Failure Scenarios
Safety-Aware Pre-Flight Trajectory Planning for Urban UAVs with Contingency Plans for Mechanical and GPS Failure Scenarios Open
Urban drone operations are exposed to unpredictable risks, including engine failure and deliberate signal interference. A recent and ongoing disruption in Jeddah, Saudi Arabia, has seen widespread GPS spoofing that misleads devices by hund…
View article: The Dodecacopter: a Versatile Multirotor System of Dodecahedron-Shaped Modules
The Dodecacopter: a Versatile Multirotor System of Dodecahedron-Shaped Modules Open
With the promise of greater safety and adaptability, modular reconfigurable uncrewed air vehicles have been proposed as unique, versatile platforms holding the potential to replace multiple types of monolithic vehicles at once. State-of-th…
View article: Schedule optimization and staff allocation for airport security checkpoints using guided simulated annealing and integer linear programming
Schedule optimization and staff allocation for airport security checkpoints using guided simulated annealing and integer linear programming Open
International audience
View article: Mixed-Integer Linear Programming Model for Collision Avoidance Planning in Commercial Aircraft Formations
Mixed-Integer Linear Programming Model for Collision Avoidance Planning in Commercial Aircraft Formations Open
With advancements in technology, commercial aircraft formation flying is becoming increasingly feasible as an efficient and environmentally friendly flight method. However, gaps remain in practical implementation, particularly in collision…
View article: Early Versus Late Traffic Management For Autonomous Agents
Early Versus Late Traffic Management For Autonomous Agents Open
Intersections pose critical challenges in traffic management, where maintaining operational constraints and ensuring safety are essential for efficient flow. This paper investigates the effect of intervention timing in management strategie…
View article: Low-G In-Plane Multi-Directional MEMS Inertial Switch With Multiple Acceleration Thresholds
Low-G In-Plane Multi-Directional MEMS Inertial Switch With Multiple Acceleration Thresholds Open
This paper reports a low-g in-plane MEMS inertial switch with multiple acceleration thresholds in multiple sensing directions. Designed for essential monitoring, this device targets low-g accelerations for health and safety applications. T…
View article: Selective Sheet Extrusion: A Novel Manufacturing Process for Large-Format Material Extrusion
Selective Sheet Extrusion: A Novel Manufacturing Process for Large-Format Material Extrusion Open
The trade-off between resolution and speed represents a significant challenge when extrusion-based additive manufacturing (AM) is used for large-format additive manufacturing (LFAM). This paper presents an analysis of a new material extrus…
View article: Towards a Robust Soft Baby Robot With Rich Interaction Ability for Advanced Machine Learning Algorithms
Towards a Robust Soft Baby Robot With Rich Interaction Ability for Advanced Machine Learning Algorithms Open
Advanced machine learning algorithms require platforms that are extremely robust and equipped with rich sensory feedback to handle extensive trial-and-error learning without relying on strong inductive biases. Traditional robotic designs, …
View article: A systematic review of robotic efficacy in coral reef monitoring techniques
A systematic review of robotic efficacy in coral reef monitoring techniques Open
Coral reefs are home to a variety of species, and their preservation is a popular study area; however, monitoring them is a significant challenge, for which the use of robots offers a promising answer. The purpose of this study is to analy…
View article: Design, simulation, and testing of a tunable MEMS multi-threshold inertial switch
Design, simulation, and testing of a tunable MEMS multi-threshold inertial switch Open
This paper presents a tunable multi-threshold micro-electromechanical inertial switch with adjustable threshold capability. The demonstrated device combines the advantages of accelerometers in providing quantitative acceleration measuremen…
View article: Polynomial Lyapunov Functions and Invariant Sets from a New Hierarchy of Quadratic Lyapunov Functions for LTV Systems
Polynomial Lyapunov Functions and Invariant Sets from a New Hierarchy of Quadratic Lyapunov Functions for LTV Systems Open
We introduce a new class of quadratic functions based on a hierarchy of linear time-varying (LTV) dynamical systems. These quadratic functions in the higher order space can be also seen as a non-homogeneous polynomial Lyapunov functions fo…
View article: Post-consolidation process for modifying microscale and mesoscale parameters of 3D printed composite materials
Post-consolidation process for modifying microscale and mesoscale parameters of 3D printed composite materials Open
Advancements in additive manufacturing technology (3D printing) have enabled us to fabricate reasonably good parts using continuous fiber-reinforced matrix composites. Unfortunately, most of these 3D-printed composite parts inherently poss…
View article: An ILP approach for tactical flight rescheduling during airport access mode disruptions
An ILP approach for tactical flight rescheduling during airport access mode disruptions Open
Airport access mode disruptions, such as a subway shutdown, threaten the whole passenger door‐to‐door journey. When such a disruptive event occurs, knowledge of passengers' delays would help the airport operation centre to decide if a depa…
View article: Runtime Assurance for Safety-Critical Systems: An Introduction to Safety Filtering Approaches for Complex Control Systems
Runtime Assurance for Safety-Critical Systems: An Introduction to Safety Filtering Approaches for Complex Control Systems Open
More than three miles above the Arizona desert, an F-16 student pilot experienced a gravity-induced loss of consciousness, passing out while turning at nearly 9Gs (nine times the force of gravity), flying over 400 kn (over 460 mi/h). With …
View article: Computing optimal trajectories for light soaring aircraft using Fast Marching Tree Star
Computing optimal trajectories for light soaring aircraft using Fast Marching Tree Star Open
In the last couple of years, performances of light soaring aircraft (para gliders, hang gliders, or light sailplanes) have increased significantly, allowing pilots to fly great distances using only the convective energy of the atmosphere. …
View article: Sensitivity Analysis in Self-Assembly Self-Repair System
Sensitivity Analysis in Self-Assembly Self-Repair System Open
We study a case of robot interaction where a robot arm partially repairs a 3D printer by adjusting one of the support columns in the structure of the 3D printer. The collaboration stability is challenged when we assume that the robot mispl…
View article: Optimising security screening resources during airport access mode disruptions
Optimising security screening resources during airport access mode disruptions Open
International audience
View article: Air-rail timetable synchronization for a seamless passenger journey
Air-rail timetable synchronization for a seamless passenger journey Open
International audience
View article: Predicting Passenger Flow at Charles De Gaulle Airport using Dense Neural Networks
Predicting Passenger Flow at Charles De Gaulle Airport using Dense Neural Networks Open
International audience
View article: Exploration of Mandibular Inputs for Human-Machine Interfaces
Exploration of Mandibular Inputs for Human-Machine Interfaces Open
The direct connection of the jaw to the brain allows it to retain its motor and sensory capabilities even after severe spinal cord injuries. As such, it can be an accessible means of providing inputs for people with paralysis to manipulate…
View article: Optimized Escape Path Planning for Commercial Aircraft Formations
Optimized Escape Path Planning for Commercial Aircraft Formations Open
There is growing interest in commercial aircraft formation flight as a means of reducing both airspace congestion and the carbon footprint of air transportation. Wake vortex surfing has been researched extensively and proven to have signif…
View article: From Observability to Observer Realization: A path via elementary block-diagram manipulations
From Observability to Observer Realization: A path via elementary block-diagram manipulations Open
Introductory state-space linear control courses focus on linear, time-invariant systems and spend intense efforts by introducing system realizations that allow the student to grasp fundamental concepts, among which controllability, observa…
View article: On Linear Time Invariant Systems Analysis via A Single Trajectory: A Linear Programming Approach
On Linear Time Invariant Systems Analysis via A Single Trajectory: A Linear Programming Approach Open
In this note, a novel methodology that can extract a number of analysis results for linear time-invariant systems (LTI) given only a single trajectory of the considered system is proposed. The superiority of the proposed technique relies o…
View article: Flight Rescheduling to Improve Passenger Journey during Airport Access Mode Disruptions
Flight Rescheduling to Improve Passenger Journey during Airport Access Mode Disruptions Open
International audience
View article: Optimal Path Planning for Soaring Flight
Optimal Path Planning for Soaring Flight Open
International audience
View article: An Accelerated Dual Fast Marching Tree Applied to Emergency Geometric Trajectory Generation
An Accelerated Dual Fast Marching Tree Applied to Emergency Geometric Trajectory Generation Open
This paper addresses the generation of aircraft emergency trajectories with obstacle avoidance. After presenting in detail the fast marching tree algorithm, in this paper we propose an improvement of its performance. First, the free space …
View article: Computing Bounds on $L_{\infty}$-induced Norm for Linear Time-Invariant Systems Using Homogeneous Lyapunov Functions
Computing Bounds on $L_{\infty}$-induced Norm for Linear Time-Invariant Systems Using Homogeneous Lyapunov Functions Open
Quadratic Lyapunov function has been widely used in the analysis of linear time invariant (LTI) systems ever since it has shown that the existence of such quadratic Lyapunov function certifies the stability of the LTI system. In this work,…
View article: Ariadne: A common-sense thread for enabling provable safety in air mobility systems with unreliable components
Ariadne: A common-sense thread for enabling provable safety in air mobility systems with unreliable components Open
Commercial air travel is by far the safest transportation modality available to humanity
\ntoday. It has achieved this enviable status by deploying thousands of professionals, including
\npilots, dispatchers, and air traffic controllers to…
View article: Indigenously Developed HD Video Transmission System for UAVs Employing a 3 × 3 MIMO Antenna System
Indigenously Developed HD Video Transmission System for UAVs Employing a 3 × 3 MIMO Antenna System Open
Real-time high-definition (HD) video transmission for long distances (.1 km) between an unmanned aerial vehicle (UAV) and a ground station is a challenging problem. The existing real-time solutions are limited to relatively low-quality vid…