Showing papers on "Vehicle engineering published in 2005"

Simulation, Development and Field Testing of a Track StiffnessMeasurement Vehicle

Abstract: A new vehicle for continuous measurement of vertical track stiffness has been built by Banverket Two oscillatingmasses of the vehicle excite the track dynamically and the track stiffness is calcul

What Is Design Engineering and How Should It Be Taught? - Proposing a Didactical Approach

Abstract: Design engineering is being taught at the Royal Institute of Technology (KTH) in the form of a Master of Science program, Design and Product Realization. The program started in August 2003, and has been rated so far by the students as the third most popular engineering program. Each year approximately 100 students are accepted. When the program was introduced by KTH, the subject of design engineering was chosen in favour of engineering design, with the purpose of establishing the program independently in relation to existing programs in mechanical engineering, vehicle engineering etc, and to establish the new program into the area of 'development of attractive products'. The aim of this paper is to present results from a didactical analysis performed on the subject of design engineering.

Development of Real-Time Control for a Hydrogen Powered Hybrid Electric Vehicle

Abstract: Hybrid electric vehicle with hydrogen fueled internal combustion engine could be an interim between current vehicles and fuel cell vehicles which are thought to be more of far term reality. This paper introduces the hydrogen engine powered parallel hybrid electric vehicle developed by Texas Tech University Advanced Vehicle Engineering Lab. It presents the innovative use of LabVIEW Real-Time controllers to develop the prototype vehicle powertrain control system. Then it discusses the hydrogen engine control issues and presents the development of the engine control unit by LabVIEW FPGA. Vehicle communication issues among the distribution management system are presented. The vehicle test results are also shown in this paper.

Speed Prediction Ability of UniTire Steady-State Model

Abstract: To reduce the experimental condition restrictions and the cost of the high speed tire tests, the ability of predicting the high speed tire force and moment characteristics from the low speed tire tests was studied by means of the UniTire model using TNO lateral tire test data under different speeds, including the effects of the speed on the dynamic frictional coefficient, on the lateral and longitudinal stiffness, and on the pneumatic trail. It is proved by the test that UniTire model is characterized by high precision in predicting the high speed performances from the low speed tire tests.

Vehicle dynamic simulation using a nonlinear finite element analysis code

Abstract: The structural integrity of either a passenger car or a light truck is one of the basic requirements for a full vehicle engineering and development program. The resu1ts of the vehicle product performance are measured in terms of ride and handling, durability, Noise/Vibration/Harshness (NVH), crashworthiness, and occupant safety. The level of performance of a vehictle directly affects the marketability, profitability and, most importantly, the future of the automobile manufacturer in this study, the Virtual Proving Ground (VPG) approach has been developed to simulate dynamic nonlinear events as applied to automotive ride & handling. The finite element analysis technique provides a unique method to create and analyze vehicle system models, capable of including vehicle suspensions, powertrains, and body structures in a single simulation. Through the development of this methodology, event-based simulations of vehicle performance over a given three-dimensional road surface can be performed. To verify the predicted dynamic results, a single lane change test was performed. The predicted resuits were compared with the experimental test results, and the feasibility of the integrated CAE analysis methodology was verified.

An Innovative Approach To The Introduction To Mechanical And Aerospace Engineering Course: Pressure

Abstract: An innovative Introduction to Mechanical and Aerospace Engineering course is described. The course material focuses on the concept of pressure to relate concepts and subject matters in the intended field. Selfand group-guided inquiry is used in and out of class. Group activities are also prescribed. The course makes use of three non-fiction popular accounts of engineering feats, relating to 1) a high-pressure environment in the deep sea, 2) a low-pressure high altitude environment and 3) the pressure-less space environment. Traditional and reflective homework assignments are used to motivate the students to pursue their intended engineering education. Student outcomes included renewed enthusiasm for studying engineering, discovery of summer job opportunities related to field of study, development of student networks, and a deepening technical sophistication throughout the semester.

On an Efficient Method fo Time-Domain Computational Aeroelasticity

Abstract: The present thesis summarizes work on developing a method for unsteady aerodynamic analysis primarily for aeroelastic simulations. In contrast to widely used prediction tools based on frequency-dom ...

Development and analysis of a vehicle model in SimMechanics for Formula Student

Abstract: • A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.

Validation of ADMS/Car simulations and dynamic performance in multi-link suspensions

Abstract: Due to the high costs of developing new chassis and suspensions, it is interesting to reduce the costs with time efficient MBA (Multibody System Analysis) programs like ADAMS, DADS, Mechanica, etc. ...

Bicycling Science [Book Review]

Abstract: application of the computational algorithms. Such author insight would have been extremely valuable. From the standpoint of extending the applicability of the receding horizon optimal control to faster processes, computational complexity represents an especially critical area. In the text, input constraints are generally emphasized more than state constraints. However, other techniques, such as antiwindup compensation and gain scheduling, exist for dealing with pure input constraints. A discussion of the relative benefits of the techniques described in the text over those prevalent in the literature would have been beneficial. Overall, a deeper look at links or extensions to nonlinear systems with general state and input constraints as well as at the associated computational issues would have been valuable. To be fair, the book does provide pointers to the literature should the reader desire a thorough look at these and other topics. In summary, the book provides a self-contained, well-thought out, and accessible introduction to a wide range of topics and fundamental principles underlying receding horizon constrained control and estimation. The developments are presented at a sufficient level of detail and mathematical rigor to accomplish this objective. The book can be used as a textbook for a graduate-level course, for independent reading, or as a reference. Several other books have recently appeared on the subject of receding horizon optimal control for constrained systems, including [2] and [3]. While the present book has some overlap with these two texts in terms of its coverage (namely the consideration of discrete linear systems having input constraints), Constrained Control and Estimation stands on its own as a complete work and a rigorous yet accessible introductory text with unique perspectives on the application of convex optimization tools to systems having input constraints.