The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Electric cars form nowadays a competitive alternative to conventional cars with combustion engine. Unfortunately, there is still the problem of a relatively short range electric cars are able to reach which makes it quite unattractive to costumers. Many research projects deal with this issue to increase the range by following different approaches. E-City-Routing is one of those projects aiming to...
Using vehicle for evacuation from areas affected by natural disaster is an important part of a rescue plan. While fleeing to safety place or evacuation center during disaster, there is a high probability to get trapped in traffic congestion. This is because people will access shortest route to safety place and road from high-populated affected area to the nearest evacuation center will be quickly...
Route choice model algorithm is one of the core technologies for traveler dynamic navigation and traffic simulation model. This article puts forward an urban dynamic multipath selection algorithm with optimal aggregate utility based on trunk network hierarchy. Using utility optimization algorithm, the traveler's preferences for high-grade roads and other behavioral characteristics like driving turn...
Variable message sign (VMS) is an important tool for traffic guidance. However, the effectiveness of VMS largely depends on the number and location of installation in road network. In practice, VMS location is always based on the managers' experiences and subjective judgments, without sufficient theoretical support. This paper presents an algorithm for VMS location through road traffic network in...
Future device to device communication using the LTE system bring new opportunities for application development. In the case of wireless sensor networks, unmanned aerial vehicles with LTE capabilities could be used to increase the network lifetime, while ensuring high transfer rates between LTE capable sensor nodes and the aerial vehicles. In this article we propose a hybrid heuristic algorithm able...
Image retrieval is a vital function for an active vision system recognizing vehicles in dynamic scenes. A pan-tilt-zoom camera provides a range of retrieval options, but is somewhat limited for algorithm development purposes in that if the conditions are not within a certain operative range (due to very bad weather, poor lighting conditions, etc.), retrieved images are not likely to be very useful...
This paper proposes a method for controlling a team of quadrotor micro aerial vehicles to perform agile maneuvers while holding a fixed relative formation, as well as transitioning between a sequence of formations. The objective is to coordinate the quadrotors to fly in intricate interlaced patterns, similarly to an air show demonstration team. The paper proposes a new abstraction, called a Virtual...
Work deals with fundamental algorithms for military vehicle stability control. Introduction of the work is focused on directional vehicle stability during cornering. One of the main part of the work is focused to develop a kinematic — dynamic model vehicle chassis in an MSC. Adams, which is later served on the simulation of certain driving situations when turning the vehicle. Vehicle model is exported...
Various versions of the Vehicle Routing Problem (VRP) have been studied for many years. VRP is a static problem, while in the real world, many problems have dynamic nature. In the Dynamic VRP (DVRP), not all information about the problem is known at the beginning of the planning horizon, and, in most cases the information can change after the solution process begins. This two characteristics make...
Odometry is a safety on-board subsystem of modern railway Automatic Train Protection (ATP) and Automatic Train Control (ATC) and his main task is the estimation of instantaneous speed and the travelled distance of the railway vehicle. An accurate estimation is mandatory, because an error (residual) on the train position may lead to a dangerous overestimation of the distance available for braking....
In this paper, we deal with the stability and tracking control problem of quadrotor unmanned aerial vehicle (UAV) in the presence of the modeling error and disturbance uncertainty. The flight tracking control system combines classical proportional-derivative (PD) like term with robust and adaptive control term. Lyapunov method is used to design and show the asymptotic behavior of the linear and angular...
In this paper, we present an algorithm to solve the Multi-Robot Persistent Coverage Problem (MRPCP). Here, we seek to compute a schedule that will allow a fleet of agents to visit all targets of a given set while maximizing the frequency of visitation and maintaining a sufficient fuel capacity by refueling at depots. We also present a heuristic method to allow us to compute bounded suboptimal results...
There has been an increasing interest in the development of unmanned surface vehicles (USVs) in recent decades. As USVs are required to carry out complex missions without any human intervention in various environments, an intelligent path planning algorithm is critical. A path planning algorithm is able to utilise environment data to calculate an optimal trajectory to guarantee safety. To achieve...
This paper describes a modified fast marching (FM) path planning algorithm for unmanned surface vehicles (USVs). The modified FM algorithm generates a two-layered synthetic vector field to represent a dynamic environment. The synthetic vector field integrates the obstacle information and the environment information, where current and wind velocities vary in both magnitude and direction. The path planning...
This paper addresses the challenge of dynamically adapting the location of the nodes in an acoustic network to optimise the localisation performance of Autonomous Underwater Vehicles (AUVs) operating in the area. A dynamic placement algorithm is presented to minimise the Cramer-Rao Lower Bound associated to the connected subset of network nodes. Algorithm performance is shown in simulation and as...
A multi-robot exploration algorithm is presented which is targeted at the exploration of 3D structures which predominantly extend along one orientation — the motivating example is underwater cliffs which are locally 3D but that are more globally seen to extend along a continuous vertical surface. The multi-robot exploration aims to maximise the sampling of the environment, causing much denser scans...
In this paper, we propose an ant based solver to solve dynamic vehicle routing problem with time windows and multiple priorities (DVRPTWMP). In this problem, a fleet of vehicles will service a number of customers with time windows. But part of customers are unknown and revealed dynamically during the execution of the routes. More specifically, customers have different priority levels. Customers with...
Though multi-agent formation and consensus have been studied intensively recently, very few of the research focuses on their engineering realization using rotor-craft unmanned air vehicle (UAV) as the basic platform. Some assumptions in many theoretical study present challenges in engineering realization, such as the over-simplified dynamic model or sensor model of each agent. In this paper, we present...
This paper analyses the workload of the drivers for a waste collection benchmark problem. The problem involves ten data sets with different number of customers to be served and different number of disposal facilities available. A heuristic algorithm, namely Different Initial Customer from a previous study is used to solve the problem by constructing vehicles routes for the drivers with two main objectives;...
The mobile ad hoc network is the network wasmobile nodes move freely in the environment and when these nodes are combined together they form a network. It is basically a type of MANET. Vehicular Ad hoc Networks exhibit highly dynamic behavior. They have high mobility and form random network topologies. In this work, we make use of the vehicle's movement pattern, vehicle density, vehicle velocity,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.