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.
The purpose of this work is to explore the possibility of using (Multi-disciplinary Design and Optimization) MDO frameworks for complex system design of space experiment. Considering both launch and space environmental requirements, the multi-objective optimization of a novel nested flying vehicle for space science experiments is carried out by decreasing launch weight, frequency response, vacuum...
The article presents a universal simulation model of the general unsignalized intersection consisting of three (T intersection) or four arms. Each arm can consist of up to 5 lanes. The model is based on gap acceptance theory which defines rules for entering the intersection. The simulation model is created using software Witness. The main advantage of the presented approach is that defining all the...
Next-generation autonomous and semi-autonomous vehicles will not only precept the environment with their own sensors, but also communicate with other vehicles and surrounding infrastructures for vehicle safety and transportation efficiency. The design, analysis and validation of various vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) applications involve multiple layers, from V2V/V2I...
There are various methodologies that support theextraction of timing models from EAST-ADL design-level modelsduring the development of vehicular embedded software systems. These timing models are used to predict timing behavior ofthe systems by performing end-to-end timing analysis. Thispaper presents a comparative evaluation of three methodologies. We present an evaluation framework that consists...
Modeling and simulation of transportation systems are extensively used because of high costs and potential safety and security issues associated with its prototyping in a real traffic. Modeling and simulation play a key role in understanding real systems through abstraction and evaluating new technologies. In this paper, we conducted a simulation-based analysis to assess potential benefits of applying...
Context: Continuous Improvement in manufacturing to attain manufacturing excellence is today's requirement. It gives cutting edge over the competitors. This has developed lot of interest for the researchers during the last few years. Vehicle Assembly Line being the most complex Assembly line has been active area of research over years and has attracted many researchers.
The transportation ecosystem is currently in a transition phase from non-electrified to electrified, from isolated to connected, and from non-automated to automated. During this transition new disruptive technologies replace existing ones but quickly become obsolete themselves. Safety and efficiency become even more important as the driver has less input into driving decisions and more difficult to...
The inherent dynamic nature of Cyber Physical Systems (CPS) requires novel mechanisms to support their evolution over their operation life time. Though typically the development of CPS integrates the software (cyber) design with the physical domain, this contribution concentrates mainly on another essential integration plane: The software design level. This paper presents an approach to support the...
In public transportation, simulation provides capabilities of investigation of complex interactions between the components of the transportation system, including infrastructure, vehicles, passengers and intelligent transportation system. Although many simulation platforms (either commercial or open source) exist to test, validate and evaluate the performance of control systems, the development of...
Integrating the computing process and the physical process, cyber-physical systems (CPS) pose many challenges to the system analysis and modeling. While most of the existing work focuses on developing the precise and formal model of CPS, little attentions have been given to the early requirements analysis and modeling which focuses on what the users' requirements are and what the software and physical...
Automotive Cyber-Physical Systems (ACPS) have attracted a significant amount of interest in the past few decades. The mechatronic control systems that are typically implemented in automotive application, such as engine control, transmission control, throttle control, and braking, typically involve multiple complex physical systems with dedicated embedded controllers that communicate with each other...
The development and test of advanced driver assistance systems (ADAS)present a challenge due to their complexity and dependency on other vehicle systems, initial conditions and their environment. Testing ADAS under real conditions leads to significant efforts and costs. Therefore, virtual prototyping and simulation are widely used instrumentsfor developing such complex systems. One of these useful...
This paper describes an analysis of emissions of carbon monoxide (CO) using a discrete event simulator of open source. It was built a simulation model to evaluate gas emissions emitted by a fleet of trucks during transportation of raw materials in a typical supply system of sugarcane in producer mills of ethanol. The simulation model was implemented in the open source simulator and in a traditional...
EcoCAR 2 is an Advanced Vehicle Technology Competition for collegiate level engineering students organized by Argonne National Laboratory (ANL) with the U. S. Department of Energy (DOE) and General Motors (GM) as the headline sponsors. The goal of the competition is to re-engineer a GM- donated 2013 Malibu Eco as a plug-in hybrid electric vehicle (PHEV) over the course of three years. Autonomie software...
This paper mainly focuses on different influences on traffic flow in large traffic flow conditions, caused by different distances between off-ramp and on-ramp on expressways. In addition, a signal control strategy on side road is proposed and discussed. Our research is based on traffic simulation software (VISSIM). In this research, the characteristics to describe traffic features include average...
Based on the problems appeared in some infantry fighting vehicle's actual training, this paper combines the advantages of virtual maintenance, proceeds from aspect of system engineering, takes demand of actual training into account, uses Solidworks, 3ds max and EON synthetically, chooses the form of desktop, set up a virtual maintenance training system of the equipment.
The European Electronic Toll Service (EETS) allows different possibilities for the overall system design of interoperable toll systems. We study the effect of the overall system design on the operational costs using a model based, holistic, executable specification. The model is set up to give an accurate description of the interdependences as seen in the German toll system. Two different scenarios...
Vehicular Ad hoc Networks (VANETs) has a high node mobility speed, frequently changed network topology and limited node movement directions. Simulation is the main method that obtained in the VENET's research. The simulation of VANET includes two main parts: the built of vehicular mobility model and the simulation of self-organizing wireless mobile network. The authenticity of network simulation result...
Flexsim software can model discrete-time system; it is an ideal choice to plan the distribution center simulation and logistics system. The paper is according to the Flexsim system simulation software, comparative analyzing the distinguish of different picking strategy of distribution center, qualitative analyzing many types of applicability and relative merits of picking strategies, discussing the...
This paper presents the structure design of a height-adjustable medical transport vehicle. It adopts the whole mechanical design, which puts forward a linkage height-regulating mechanism consisted of the X-bar and the parallelogram-bar to adjust the height of the medical transport vehicle. Then a comprehensive CAE simulation analysis has been fulfilled using ANSYS software to this transport vehicle...
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.