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Found 6273 publications

Identification and reconstruction of car body deformation applying tensor product models

No authors available

Publication Name: INES 2006: 10th International Conference on Intelligent Engineering Systems 2006

Publication Date: 2006-12-01

Volume:

Issue:

Page Range: 98-101

Description:

Car body deformation modeling plays a very important role in crash accident analyses, as well as in safe car body design. The determination of the energy absorbed by the deformation and the corresponding Energy Equivalent Speed can be of key importance, however their precise determination is a very difficult task. Although, using the results of crash tests, intelligent and soft methods offer an automatic way to model the crash process itself, as well as to determine the absorbed energy, the before-crash speed of the car, etc. In this paper a modeling technique and an intelligent expert system are introduced which together are able to follow the deformation process of car bodies in car crashes and to analyze the strength of the different parts without any human intervention thus significantly can contribute to the improvement of the modeling, (automatic) design, and safety of car bodies. © 2006 IEEE.

Open Access: No

DOI: DOI not available

Application of tensor product models for vehicle de-formational processes

No authors available

Publication Name: Proceedings of the Mini Conference on Vehicle System Dynamics, Identification and Anomalies

Publication Date: 2006-12-01

Volume:

Issue:

Page Range: 615-620

Description:

Modelling of vehicle deformational processes plays an important role in car body design and accident analysis. It is a difficult task and usually carried out applying a kind of finite element method. Determination of the absorbed energy by the deformation and the corresponding energy equivalent speed (EES) can be of great importance. Exact determination or measuring of these quantities is almost impossible, so one could estimate them. In this paper we introduce a modeling technique and a model for describing the deformation process. A short description of the main idea: let we have a 3-dimensional rectangular grid on the vehicle body (or on something else). The partition is determined by taking into consideration the energy absorbing properties of the parts of the vehicle, so each cell is approximately homogenous. The cells could be identified as the entries of a tensor of order 3. We concentrate on the energy absorbed by the cells, but not on the physical coordinates of the cells. Energy absorption property (rate of the input and the absorbed energy) of a certain cell could change during the deformational process, so the absorbed energy is calculated using a monotonous decreasing function. These functions can be defined for each possible orthogonal direction of the possible impact. Instead of the original impact we deal with its orthogonal components and the result will be the sum of the particular results. The rectangular grid allows us to compute from level to level. These computations can be realized applying tensor products, the model has low complexity which can be more decreased by complexity reducing methods known from linear algebra.

Open Access: No

DOI: DOI not available

The configurable digital cellular neural - Hopfield network

No authors available

Publication Name: INES 2006: 10th International Conference on Intelligent Engineering Systems 2006

Publication Date: 2006-12-01

Volume:

Issue:

Page Range: 160-164

Description:

A configurable Artificial Neuron Network that is capable of establishing both the emulated digital Cellular Neural Network (CNN) and the Hopfield Network is described. The configurable neural network is designed with the method of modularity where each module is a three weighted input neuron. The network can be optionally large limited only by the gate number available on a chip. Also, the network is reconfigurable during operation. © 2006 IEEE.

Open Access: No

DOI: DOI not available

Reduction of vibrations generated by the drive system of rail vehicles

No authors available

Publication Name: Proceedings of the Mini Conference on Vehicle System Dynamics, Identification and Anomalies

Publication Date: 2006-12-01

Volume:

Issue:

Page Range: 177-182

Description:

The vibrations coming from the drive system of the railway vehicle induces damages to the car-body of the vehicle. The aims of the current test were to come into the position of determining the causes of these vibrations, to explore the reduction possibilities, to point out the loci of resonance, to speed up the recognition of failures and the renewal purpose repair processes of the vehicles.

Open Access: No

DOI: DOI not available

Spatial and spectral properties of the dummy-head during measurements in the head-shadow area based on HRTF evaluation

No authors available

Publication Name: Institute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006

Publication Date: 2006-12-01

Volume: 7

Issue:

Page Range: 4477-4486

Description:

In accurate and repeatable measurements dummy -heads are often used to model the average human head and body. They are suited for standardized measurements and for investigating the human spatial hearing and localization performance. The monaural Head-Related Transfer Functions (HRTFs) of the dummy-head can be used for various investigations. This paper uses the HRTF-set of a Brüel & Kjaer head and torso simulator focusing on the so called monaural head-shadow area, where one of the ears is shadowed by the head itself. Based on long-term measurements using the bare torso as well as other accessories (glasses, clothing etc.) on it, the extent of the head-shadow area will be presented in frequency and space. The head-shadow area is investigated in connection with the overall SNR of the measurement and sensitivity domains of the ears. Conclusions are drawn for binaural recognition in human spatial hearing using low-frequency 'bright spots' and high-frequency information during lateral-contralateral evaluation.

Open Access: No

DOI: DOI not available

Evaluation of dummy-head HRTFs in the horizontal plane based on the peak-valley structure in one-degree spatial resolution

No authors available

Publication Name: Institute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006

Publication Date: 2006-12-01

Volume: 7

Issue:

Page Range: 4487-4495

Description:

Dummy-heads are often used for standardized measurements where modeling of the human head and torso is relevant. Monaural Head-Related Transfer Functions of a Brüel & Kjaer dummy were measured in the horizontal plane in one-degree spatial resolution. Evaluation is made by plotting the peak-valley structure in frequency. Special frequency and spatial domains can be determined based on the variations of the HRTFs that are relevant to understand physical properties of the dummy -head in measurements and processes of human directional hearing. Symmetries and similarities of measured HRTFs help to scrutinize the perception of directional information in the monaural and binaural evaluation, the "noisy domain" in frequency and space where shadowing of the head occur as well as the filtering effect of the pinna.

Open Access: No

DOI: DOI not available

The spatial structure of flows, Reynolds stress and turbulence in the CASTOR tokamak

No authors available

Publication Name: 33rd EPS Conference on Plasma Physics 2006, EPS 2006

Publication Date: 2006-12-01

Volume: 2

Issue:

Page Range: 1452-1455

Description:

Open Access: No

DOI: DOI not available

RFId application in production process of an automotive industry supplier

No authors available

Publication Name: INES 2006: 10th International Conference on Intelligent Engineering Systems 2006

Publication Date: 2006-12-01

Volume:

Issue:

Page Range: 45-48

Description:

The Department of Logistics and Forwarding at Széchenyi István University in Györ, Hungary started a project in an automotive industry supplier company. The purpose of the project is to grow the efficiency of the production process. In order to achieve the target we should reorganized the IT system. During the research we had to take the special production circumstances and the already exist ad hock information system into consideration. The article adumbrates the course of the project shortly, the faults of the system, the own-developed new information system and represents how the human failures could be eliminated though RFId application. © 2006 IEEE.

Open Access: No

DOI: DOI not available

Realization of the Jiles-Atherton hysteresis model applying the LabVIEW and MATLAB software package

Miklós Kuczmann Eszter Sárospataki

Publication Name: Journal of Electrical Engineering

Publication Date: 2006-12-01

Volume: 57

Issue: 8 SUPPL

Page Range: 40-43

Description:

In this paper we will show a procedure developed under MATLAB and LabVIEW software package which is able to simulate the scalar ferromagnetic hysteresis applying the Jiles-Atherton model. The MATLAB realization has been developed to analyze the behaviour of model, the LabVIEW realization has been applied to simulate a toroidal shape core. The measurement system containing the core will be the basis of a controlling algorithm to realize sinusoidal form of the magnetic flux density. © 2006 FEI STU.

Open Access: Yes

DOI: DOI not available