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There has been a lot of work on finding safest path from source to destination. However, all these works mainly rely on the crime data available through government sources. The works are missing many important factor that affect safety of a route. In this work, we first propose safety measurement score and then show how it can be used for safe navigation. We proposed a comprehensive safety measure...
The decisional capability of robotic systems has expended significantly in recent years. Their validation typically implies expensive and laborious test campaigns in the field. Part of the validation could use simulation means, but there is currently no systematic method to test robots in virtual worlds. This work aims to provide such a method. We discuss the challenges regarding the definition of...
We introduce ProbLP, a probabilistic local planner, for safe navigation of an autonomous robot in dynamic, unknown, continuous, and cluttered environments. We combine the proposed reactive planner with an existing global planner and evaluate the hybrid in challenging simulated environments. The experiments show that our method achieves a 77% reduction in collisions over the straight-line local planner...
This paper presents a new cascade control architecture formulation for addressing the problem of autonomous vehicle trajectory tracking under risk and comfort constraints. The integration of these constraints has been split between an inner and an outer loop. The former is made of a robust controller dedicated to stabilizing the car dynamics while the latter uses a nonlinear Model Predictive Control...
This system is invented under the circumstance that security incidents frequently occurs when contemporary college students taking into outdoor activities. It is constructed based on the central idea of exploiting a safety management system on mobile terminal to further introduce the over all layout, different sorts of capacity and technology data base. The primary goal is to ensure the security of...
This article presents an Android application for safety driving based on OsmAnd, an open source platform offering offline maps and navigation. Our application extends OsmAnd to achieved smart navigation features by creating a network of vehicles. These features allow informing regular vehicles about incoming emergency vehicles, which include ambulances, police cars and fire brigades. The goal is to...
In this paper, we propose a discrete-time navigation algorithm for a non-holonomic mobile robot. A sensor network, which consists of some range finders, is deployed in a planar environment to detect static and moving obstacles. The robot or a server obtains the real-time local maps from sensor nodes and calculates a temporarily safe path from the robot's current position to a given target. The generated...
Modern unmanned aerial vehicles (UAVs) rely on constant periodic sensor measurements to help avoid obstacles, deal with system disturbances and correct uncertainties. However, constant checking is time and energy consuming and is often not necessary especially in situations in which the UAV can safely fly using open loop control without entering unsafe states. Thus, in this paper we focus on two main...
Based on the features and limitations of maritime communication in the associated areas, this paper focuses on the key technology of wide-band communication network at sea under E-navigation framework. New methods and strategies to realize wide-band communication as well as some issues to be tackled for ensuring its development had been addressed. Especially, the WiMAX (Worldwide Interoperability...
The increasing number of personal and commercial vehicles in transit induces a high volume of road traffic, which can often lead to serious incidents such as permanent traffic jams, increased gas pollution, accidents with material or even human losses. Technology and transportation infrastructure providers are required to provide safer, more scalable, flexible, and cost effective solutions to these...
In order to enhance the safety of maritime transportation, index evaluation system of safe navigation in different sea areas is established based on relative data extracted and analyzed by ship-borne Automatic Identification System (AIS). Firstly, according to the AIS-based index evaluation system, a fuzzy optimization model are established based on system fuzzy decision theory and multi-objects and...
The ability to navigate in diverse and previously unknown environments is a critical service of autonomous robots. The validation of the navigation software typically involves test campaigns in the field, which are costly and potentially risky for the robot itself or its environment. An alternative approach is to perform simulation-based testing, by immersing the software in virtual worlds. A question...
This article focuses on fuzzy set theory as intelligent tools for navigator's decision-making to improve the safety of marine vessels in collision situations. A lot of progress has been made, especially in the field of artificial intelligence. The paper goal is to develop a decision support system based on artificial intelligence to determine a ship's trajectory in a collision situation. In this present...
This paper deals with the reliability assessment for an UAV (Unmanned Aerial Vehicle) system: once a specific architecture is selected (after a trade-off phase), the reliability assessment represents a key issue to optimize the design of any complex system. The final aim is to evaluate the intrinsic reliability at the design stage to avoid any critical failure that may leads to a catastrophic effect...
The main purpose to push the development towards autonomous maritime operations in shipping and offshore installations, is to increase the performance of maritime activities; by social benefits for staff or other related personal groups; by economic benefits when the ability to increase the cargo or effectuate better space allocation; by environmental benefits that's allow the ship operations to be...
Mobile robots use several sensors to obtain information about the surrounding environment and perform its mission. In general, when an operator controls this robot remotely, the situation around robot should be recognized only by the transmitted information from it. However, it is hard to operate it easily without collision using the limited information transmitted from it. If the robot have its autonomy...
Dementia, Autism, and Alzheimer's disorders affect millions of people worldwide. Suffering from forgetfulness, affected patients tend to wander off and potentially get into dangerous situations. This work develops the Alzimio mobile app, to provide safety functions to these patients; including safe-zone geofencing, activity-based alarms, take-me-home, navigate to nearest friend, and check-on-me. Six...
An improved nonlinear dynamic inverse guidance law is proposed for the problem of UAVs collision avoidance in this paper. First, a method based on collision cone boundary is investigated for collision detection. Second, an improved nonlinear dynamic inverse guidance law, which can be applied to multiple initial angles and speeds, is designed to ensure the security of UAVs collision avoidance. In addition,...
Ship weather routing problem has a crucial importance especially for transoceanic voyages, where voyage time reaches several days and the distance is thousands of nautical miles. This paper presents an optimization method for multi-objective ship weather routing problem. The voyage time and voyage risk are both taking into account and the multi-objective evolutionary algorithm NSGA-II (Non-Dominated...
In the article, the concept of a heterogeneous wireless maritime mesh network offering transmission for e.g., e-navigation services is presented. The constrains of existing and competitive solutions are discussed showing the need for a new system. The authors present detailed information about a netBaltic node's architecture and networking mechanisms offering different transmission capabilities and...
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