Showing papers on "Vehicle engineering published in 2008"
TL;DR: In this article, the authors present a study of assessing track geometry quality (longitudinal level and alignment) by the use of dynamic track-vehicle simulations and wavelength spectra analysis.
Abstract: This paper presents a study of assessing track geometry quality (longitudinal level and alignment) by the use of dynamic track-vehicle simulations and wavelength spectra analysis. Two simulation mo ...
38 citations
TL;DR: In this paper, the main challenges in performing this extrapolation is how model support, wall interfeerences, and model instability interferes with free flight conditions, and the authors summarize some of the problems when wind tunnel data should be scaled to free flight condition.
37 citations
01 Jan 2008
TL;DR: A procedure for numerical simulation of rail wear and corresponding profile evolution has been formulated in this paper, where the wear is assumed to be uniform in the sense that the profiles remain constant along the line of travel.
Abstract: A procedure for numerical simulation of rail wear and the corresponding profile evolution has been formulated. The wear is assumed to be uniform in the sense that the profiles remain constant along ...
35 citations
18 Aug 2008
TL;DR: In view of a continuous increase of computer performance, it is nowadays feasable to use CFD (Computational Fluid Dynamics) analysis very early in the conceptual design stage, if not the pre-concep ...
Abstract: In view of a continuous increase of computer performance, it is nowadays feasable to use CFD (Computational Fluid Dynamics) analysis very early in the conceptual design stage, if not the pre-concep ...
26 citations
23 Jun 2008
24 citations
01 Jan 2008
TL;DR: Carbody tilting is today a mature and inexpensive technology allowing higher speeds in curves and thus reduced travel time as discussed by the authors, and it is accepted by most train operators, but a limited set of
Abstract: Carbody tilting is today a mature and inexpensive technology allowing higher speeds in curves and thus reduced travel time The technology is accepted by most train operators, but a limited set of
22 citations
TL;DR: In this paper, a multi-body system post-derailment module was developed to predict the wheelsets' behaviour after impact with concrete sleepers. But it is not suitable for wheel-rail fasteners.
Abstract: An earlier developed multi-body system post-derailment module. that predicts the wheelsets' behaviour after impact with concrete sleepers, is upgraded to account for possible wheel-rail fastener im ...
19 citations
01 Jul 2008
TL;DR: In this paper, the authors set a first step to reduce this lack of knowledge by analysing rail vehicles' post-derailment behavior as ameans of minimizing consequences.
Abstract: Studies published on rail vehicles' post-derailment behaviour as ameans of minimizing consequences are surprisingly scarce. This paper sets a first step to reduce this lack of knowledge by analys ...
11 citations
TL;DR: In this article, rolling contact fatigue (RCF) has become more common oil wheels of passenger trains and cracks initiated at the wheel surface have been found on certain trains, which has led to wheel damage.
Abstract: Of late, rolling contact fatigue (RCF) has become more common oil wheels of passenger trains. Cracks initiated at the wheel surface have been found on certain trains, which has led to wheel damage ...
9 citations
TL;DR: In this paper, a need of improving the cross-wind gusts in bus and coach traffic is discussed, which is considered to be one of the safest means of travelling. But, there is a problem with accidents due to cross wind gusts.
Abstract: Bus and coach traffic is considered to be one of the safest means of travelling. Still, there is a problem with accidents due to crosswind gusts. Therefore it is a need of improving the crosswind p ...
8 citations
01 Jan 2008
TL;DR: A simulation of how a person would feel if they could drive with closed eyes and could nonetheless explain which vehicle it was that they were sitting in at the time of the simulation.
Abstract: Driving a car gives us a certain feeling. Driving another car returns a very differentexperience. If we could drive with closed eyes, we could nonetheless explain which vehicle itwas we were sittin ...
Journal Article•
TL;DR: In this article, the design process of controller for active suspension employed by an pickup vehicle based on co-simulation is proposed by an active suspension system, where a detailed multi-body dynamic model of the vehicle was established by using ADAMS/CAR software package; an Adaptive Fuzzy PID controller was designed for active suspensions system and worked out by means of MATLAB/SIMULINK.
Abstract: The design process of controller for active suspension employed was proposed by an pickup vehicle based on the co-simulationFirst,a detailed multi-body dynamic model of the vehicle was established by using ADAMS/CAR software package;Second,an Adaptive Fuzzy PID controller was designed for active suspension system and worked out by means of MATLAB/SIMULINK,the proposed control algorithm was integrated with the multi-body dynamic vehicle model and the co-simulations could be performed repeatedly until a satisfactory controller is achieved The co-simulation model could simulate vehicle dynamic response with the control of ASS under pulse road and random road As a result,it is very useful to speed up the development of ASS system,and a kind of effective method for vehicle engineering was provided
01 Jan 2008
TL;DR: In this article, the authors present a numerical investigation of the effect of wind conditions on ground vehicles and show that transient disturbances concerning ground vehicles are not only due to rail or road irregularities but also caused by unsteady ambient wind conditions.
Abstract: Transient disturbances concerning ground vehicles are not only due to rail or road irregularities but are also caused by unsteady ambient wind conditions. This study presents a numerical investigat ...
22 Jun 2008
TL;DR: In this paper, the authors present the strategies and academic measures in place in an undergraduate vehicle engineering program, which aim to provide students with the experience and skills demanded by the vehicle industry, both global and local.
Abstract: This paper presents the strategies and academic measures in place in an undergraduate vehicle engineering program, which aim to provide students with the experience and skills demanded by the vehicle industry, both global and local. The demands placed on graduates of engineering programs in the workplace are manifold, regardless of where they work. Companies expect graduates to come equipped with engineering expertise, problem-solving skills, the ability to work alone and in teams, knowledge of business and management practices, as well as communication and interpersonal skills, foreign language proficiency, and some form of international experience. Nowhere is this more prevalent than in the vehicle sector. With this in mind, a compact engineering curriculum was developed in close cooperation with the automotive and railway industry in Austria to meet the needs of the evolving local and international markets. The curriculum, based on a broad palette of engineering subjects, project work, a mandatory internship, business and management training, and English as a second language, is still in place over a decade later, with a number of important additions. This paper will describe the main features of the curriculum as it is today and show how the implementation of specific academic measures to the degree program has been a vital step towards providing a more all-round educational experience. It also aims to illustrate how, in the absence of a specifically designated ‘global engineering program’, a greater international dimension can be added to an already compact and demanding engineering program to the benefit of all the students.
Dissertation•
01 Jan 2008
01 Jan 2008
TL;DR: This thesis presents the work done to implement new computational tools and methods dedicated to aircraft conceptual design sizing and optimization that have been exercised on different airliners.
Abstract: This thesis presents the work done to implement new computational tools and methods dedicated to aircraft conceptual design sizing and optimization. These tools have been exercised on different air ...
Dissertation•
01 Jan 2008
TL;DR: In this paper, the MIT ship cost estimation model was updated by combining the two existing models (the Basic Military Training School (BMTS) Cost Model and the MIT Math Model) in order to develop a program that can accurately determine both a ship's acquisition cost as well as its life cycle cost.
Abstract: This thesis project will update the MIT ship cost estimation model by combining the two existing models (the Basic Military Training School (BMTS) Cost Model and the MIT Math Model) in order to develop a program that can accurately determine both a ship's acquisition cost as well as its life cycle cost. Using United States Coast Guard resources, this project will also address various aspects of the ship design process which have a direct effect on the cost of building a ship. This will include, but not be limited to, the cost estimation process, determining which design decisions have the biggest impact on the ship's total cost, common pitfalls in the design process that lead to increases in cost, and lessons learned that have helped minimize the cost of a ship.
01 Jan 2008
TL;DR: In this article, an automatic tape-laying machine can shorten the process cycle by stacking prepreg composite components, which can reduce the cost of composite components in the manufacturing process.
Abstract: With the aim of reducing cost of prepreg composite components, manufacturing methods are developed and refined. An automatic tape laying machine can shorten the process cycle by stacking prepreg fl ...
23 Jun 2008
TL;DR: Targets, constraints and rules for hybrid management in a series hybrid bus intended for commercial introduction are presented in this article, where the authors propose a series of hybrid management rules.
Abstract: Targets, constraints and rules for hybrid management in a series hybrid bus intended for commercial introduction
01 Jan 2008
TL;DR: In this article, the authors have shown that buses are overrepresented at accidents during winter road conditions compared to other vehicle types, and that the traffic safety of buses during the wintertime has be...
Abstract: Earlier studies have shown that buses are overrepresented at accidents during winter road conditions compared to other vehicle types. Hence, the traffic safety of buses during the wintertime has be ...
01 Jan 2008
TL;DR: The 100th anniversary of the Wright brothers' first successful airplane flight was celebrated in 2003 as mentioned in this paper, marking the first time a heavier-than-air vehicle with an engine successfully propelled itself into flight.
Abstract: December 17, 2003 marked the 100th anniversary of the Wright brothers’ first successful airplane flight–the first time a heavier-than-air vehicle with an engine successfully propelled itself into flight. Aviation has come a long way since 1903. We’ve broken the sound barrier; we can fly more than 500 people on a single jumbo jet; and we’ve landed on the moon. All in less than a century!
01 Jan 2008
01 Jan 2008
TL;DR: In this article, the authors deal with the problems of scaling aerodynamic data from wind tunnel to free flight conditions, and the main challenges when this scaling should be performed is how the model support, wall wall...
Abstract: This thesis deals with the problems of scaling aerodynamic data from wind tunnel to free flight conditions. The main challenges when this scaling should be performed is how the model support, wall ...
Patent•
15 Apr 2008
TL;DR: In this paper, the authors improved the mechanical properties of butt joint connections in core composite structures by introducing armoring elements in the thickness direction of the core composite structure (z direction), which may be utilized for the production of core composites for applications in aerospace and ship building, automobile and rail vehicle engineering, energy system engineering and sports equipment engineering.
Abstract: The invention is based on the aim of improving the mechanical properties of butt joint connections in core composite structures by introducing armoring elements in the thickness direction of the core composite structure (z direction). The invention may be utilized for the production of core composites for applications in aerospace and ship building, automobile and rail vehicle engineering, energy system engineering and sports equipment engineering.
22 Jun 2008
TL;DR: In this article, a case study focused upon encouraging discussion and awareness of aerospace and naval engineering opportunities in a classroom comprised of both majors through a two-part (individual and group) project on sea-based aviation.
Abstract: This case study focuses upon encouraging discussion and awareness of aerospace and naval engineering opportunities in a classroom comprised of both majors through a two-part (individual and group) project on sea-based aviation. In this paper, the result of the students interactive thought process is summarized with input as to how to make similar exercises more effective in future course offerings. Additionally, student feedback as to the use of this assignment for emphasizing to them the importance of a multi-disciplinary (multi-vehicle) systems perspective rather than a unit perspective is presented.
Patent•
01 Oct 2008
TL;DR: In this article, the authors proposed a low-speed automobile engineering transmission case, which includes a main case and a back auxiliary box, which are separated arranged and connected by a transition plate.
Abstract: The invention belongs to the field of automobile engineering transmission case, especially to a low-speed automobile engineering transmission case, which resolves problems of bad climbing capacity, hard lift and unreliable use for low-speed automobile engineering transmission case of prior art. The low-speed automobile engineering transmission case includes a main case and a back auxiliary box, which are separated arranged and connected by a transition plate. Advantages of the low-speed automobile engineering transmission case are that: separable structure makes transmission with small center distance to output larger transmission ratio and has compact structure and wide bearing breadth belt, so that the engineering transmission case can satisfy demands of road transportation and project operation of low-speed automobile, and has smaller structure size, larger gear speed ratio, wider project adaptability and superior capability price ratio compared to seven gear box employed for low-speed automobile engineering vehicle of prior art.
01 Jan 2008
TL;DR: In this article, the authors describe how simulators play an important role in many fields of research and development, such as vehicle industry simulators are used as powerful tools for product development, often with focus on HMI.
Abstract: Driving simulators play an important role in many fields of research and development. In vehicle industry simulators are used as powerful tools for product development, often with focus on HMI, act ...
01 Jan 2008
TL;DR: The objectives are to understand flight instabilities experienced by the UAV and to propose solutions for the flight stability and control problems via an integrated modeling framework, and to assess the impact of flight control system and its ATTENTION: The Singapore Copyright Act applies to the use of this document.
Abstract: This thesis outlines the effort in developing an integrated simulation framework for assessing the stability and control characteristics of an Unmanned Aerial Vehicle (UAV). The objectives are to understand flight instabilities experienced by the UAV and to propose solutions for the flight stability and control problems via an integrated modeling framework. The basic core of the framework involves the incorporation and integration of the UAV aerodynamic characteristics, flight stability derivatives and digital flight control system, into a six degree-of-freedom flight simulation model, the outputs of which are visualized graphically. To support the development of the simulation model, a comprehensive aerodynamic database for the UAV is required. Empirical aerodynamic estimation software such as USAF Digital Datcom and computational flow simulation software suites such as FLUENT and Solidworks Flo Works have been used to estimate the aerodynamic force and moments as well as stability and control derivatives of the UAV. By combining these estimates with wind tunnel data, a comprehensive aerodynamic characteristics model is constructed for augmenting the flight dynamics model of the UAV. Initially, a de-coupled longitudinal and lateral stability analysis based on the small disturbance theory has been developed to understand the stability modes of the UAV. A coupled longitudinal and lateral stability analysis was then developed to study the effects of the aerodynamic coupling caused by the single propulsion system to the stability and control characteristics. The model is created within the programmable software environments of d at lab^, ~imulink' and Aerospace s lock set@ which are used to construct the six-degree-of-freedom model for the dynamical motion of the UAV. The inputs to the model include the aerodynamic information based on the aerodynamic characteristics, stability derivatives, engine characteristics, flight variables and atmospheric disturbances. The outputs from this model are the responses of the flight variables depicting lateral, longitudinal and directional stability characteristics of the flight vehicle. Virtual Reality based systems such as the Flight Gear software has been used as a graphical interface for displaying the UAV trajectory, the orientation of the vehicle and the stability and control characteristics of the UAV based on the outputs from the model. With this framework, it is possible to assess the impact of flight control system and its ATTENTION: The Singapore Copyright Act applies to the use of this document. Nanyang Technological University Library