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.
This paper proposes an end-effect equivalent 2D model to analyze back-EMF of high speed permanent magnet synchronous motor(PMSM) in order to consider a leakage flux in the end region of stator and air-gap. Since 2D FEA does not provide a precise analyzing result of back-EMF calculation due to the long airgap, an equivalent back-EMF simulation method is proposed. The proposed model of back-EMF analysis...
In order to exert the autonomy of Unmanned Aerial Vehicle's(UAV) decision-making, based on fuzzy cognitive map (FCM), UAV's autonomous decision-making model is established. However, when UAV cannot make certain decision because of self-limiting, Manned Aerial Vehicle(MAV) will make intervention. Thus this paper designs three levels of limited intervention collaborative decision-making mechanism. By...
The aircraft target in the airport and its ground background are significant in military applications. In order to employthe algorithms for the detection, identification and dynamic monitoring, a software which can complete infrared radiation simulation of aircraft/ground object in airports under conditions of different seasons, different meteorological conditions, different periods and different...
Increasing green energy usage has become a priority for towns and municipalities. A general lack of awareness regarding the many benefits of green energy remains a formidable impediment for wide spread adoption of green technologies. A potential solution to this problem is educating K-12 students and increasing their awareness of the benefits of green energy. Doing so will lead to an increase in the...
Simulation of human flow in virtual reality systemplays an important part in the research of microscopic humanflow behaviour in disaster situations. But developing such simulationis a difficult work because of its inherent complexity. In thispaper, we proposed a multi-agent simulation to analyze humanflow characteristics in disaster affected area and the interactionmechanism among human or between...
Permanent magnet (PM) machines have been widely employed in electric vehicles, wind power generators, domestic appliances, and industrial servos etc. When the rotor is eccentric, either static or dynamic due to manufacturing or operating tolerances, the full machine model is necessary for finite element analysis (FEA), because the model cannot be simplified by utilizing the periodicity any more. This...
Design and engineering of space vehicles involve several different disciplines, each of which have specific research methodologies and software tools. Interaction among the physical analysis tools, as well as collaboration among teams, is a delicate and difficult subject of collaborative engineering research topics. This paper presents a solution based on a new technical and interaction design. We...
This paper develops a path planning simulation method in AGI software platform for multirotor UAVs in a 3D environment with avoiding the obstacles is presented. A multi-RRT (rapidly exploring random tree, RRT) algorithm is applied to compute the preliminary flight paths.
The continuous process of ILS (Integrated Logistic Support) tasks is attributed to the stable state of ILS process system composed of ILS activities. In terms of individual activity, the variation of the entire process state was random, but from an overall perspective, it followed certain statistical regularity. According to the above characteristics of ILS process, the author was able to discover...
With the fast development of the aerospace, the design and manufacture of landing gear are becoming hot topics nowadays. The development and application of the Virtual Prototyping Technology (VPT) have opened up a new field of the design and manufacture of the aircraft, the design, manufacture and test of the aircraft have made qualitative leaps in concept and method. Modeling and Simulation Techniques...
A novel, standardized geometric model of the human upper respiratory tract was created by aligning and processing the computed tomography (CT) scans of upper respiratory airway of healthy subjects. Digital three-dimensional (3-D) geometric model of 3 single human upper respiratory airway were generated from the CT scans and a methodology was developed to scale, orient, and align the models, after...
Numerically rigorous full-wave electromagnetic analysis of scattering from hailstones based primarily on the method of moments is presented. The analysis employs generalized curved hexahedral volume and surface elements of arbitrary geometrical-mapping orders, current polynomial vector basis functions of arbitrarily high expansion orders, and higher order modeling of inhomogeneous lossy dielectric...
Future smart traffic environments require very accurate positioning of vehicles to allow for sophisticated traffic flow modeling or autonomous control of cars. To avoid traffic congestion on motorways, a lane-specific localization of vehicles is required to allow for the detection of short-term deviations of traffic flows due to roadwork or accidents. In this paper, we investigate the accuracy of...
Simulation is widely used to assess and/or improve the energy efficiency of both existing and new buildings. Such an analysis has to account for heterogeneous phenomena efficiently, to manage components in a modular manner, and (which is seldom addressed in a structured way) to scale the detail level in all or part of the model, based on the particular simulation goal. In this manuscript, a proposal...
Assembly simulation is an important step in the process of digital aircraft manufacturing planning which helps engineers find the defects in the preassembly plan and fix them before practical assembly. In this paper, a simulation system for flexible aircraft assembly is proposed. It uses OGRE and PhysX as the development platform instead of customizing commercial CAD/CAM platforms or implementing...
Differential pair routing on Printed Circuit Board (PCB) level is widely used as interconnection due to its excellent performance in signal integrity. However, differential pair routing is not perfectly immune to the impact of routing discontinuities. This paper analyzes the impact of differential pair microstrip with routing discontinuities by using industrial configuration standard. There are two...
The concepts, operating paradigms, and required technologies of the Next Generation Air Transportation System (NextGen) are still evolving. These continuing changes highlight a need for a modeling platform that can effectively address the complexity of diverse future scenarios and help assess their impact on safety. We discuss this need in detail with respect to the requirements and benefits of such...
This paper investigates the development of simulation in relation to Business Process Modeling (BPM). Comparing the way discrete event simulation is used alongside BPM software as opposed to the more traditional use of simulation as a stand-alone technology more rooted within the Industrial Engineering and Operational (Operations) Research disciplines. The paper will compare the way simulation is...
Most of simulation is based on ideal situation, but the real logistics system is complex and variable. Multi-resolution modeling can meet needs of different environments on the simulation, and adapt to the diversity, from different angles and aspects of simulation modeling. Based on the research of MRM, the method of aggregation and disaggregation is analyzed, the paradigm of aggregation and disaggregation...
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.