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Keresési eredmények
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Simulation of BLDC Motor Drive Systems for Electric Vehicles Using Matlab Simulink
48-52Megtekintések száma:211The defining scientific developments of our time would not have been possible without the use of simulations. The aim of the research is to create a simulation of a BLDC motor. When creating a simulation, great emphasis must be placed on defining the purpose of the simulation. This basically determines the structure and complexity of the model. The model discussed here was created so that an optimization task could be defined more precisely by inserting it as a sub-model into a vehicle dynamics model. Scalability was another aspect, that is, to be able to increase the accuracy of the model with measured data in the future, as well as to be able to validate it. During the research, a BLDC motor efficiency map generation program was created, as well as an environment for testing the generated data. The created system gives researchers the opportunity to use a shape-correct efficiency model when simulating a BLDC motor even without measured data. This makes it possible to discover real relationships between model parameters when performing optimization.
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Járművek menetdinamikai szimulációja Matlab/Simulink környezetben
36-41Megtekintések száma:250A következőkben járművek menetdinamikai szimulációjának a lehetőségeivel foglalkozunk. Az egyszerű kétkerék-modelltől kezdve, a valós futóművel rendelkező jármű tetszőleges útfelület mentén történő mozgásának a szimulációját mutatjuk be. A MATLAB, Simulink, valamint a Simscape nagyon jól használható eszközöket biztosít az előbb említett célok eléréséhez. Az így kapott járműmodell gyakorlati felhasználásának a hasznába is betekintést nyerünk, hiszen a szimuláció során ismert adatok birtokában gyakorlatilag bármilyen szabályozó algoritmus szimulációjára lehetőségünk van: a cikkben egy egyszerű ABS szabályozás kerül bemutatásra.
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Automated static structural FEA environment in MATLAB using Solid Edge and Femap
17-22Megtekintések száma:103Nowadays, CAD and FE software are getting integrated to each other. However, these new integrated pieces of software cannot be customized enough to analyze different optimization methods or model behavior. In this paper, a MATLAB environment is developed that connects to C# and VB programs, which use Solid Edge and Femap API functions, in order to automate the geometry modification and the FE model building and solving functions. A simple static structural size optimization problem is solved with the fmincon solver of MATLAB.
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Párhuzamos kinematikájú manipulátorok kinematikájának és munkaterének vizsgálata
1-5Megtekintések száma:112A kutatás célja két párhuzamos manipulátor kinematikájának és munkaterének vizsgálata. A kinematikai vizsgálatok vektoralgebrával és a Newton módszerrel készültek el. A munkaterek konstans orientációval kerültek ábrázolásra. A dolgozat eredménye, hogy a két manipulátor kinematikája és munkatere összehasonlítható. A számításokhoz a MATLAB program került felhasználásra.
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Review of Modern Vehicle Powertrains and Their Modelling and Simulation in MATLAB/Simulink
232-250Megtekintések száma:1049Thanks to technological advances and environmental standards, as well as changing usage patterns, road vehicles are constantly developing. Electric and hybrid vehicles are playing an increasingly important role in today’s road transport. The most significant changes are probably in the powertrain of vehicles. The efficiency of internal combustion engines increases while their emissions continue to decline. In addition, high performance electric motors, batteries and even fuel cells play an increasingly important role in hybrid and electric vehicles. In this publication, we review the drive systems of current modern vehicles and the types and characteristics of their major components. We also review the available models and computer programs for their simulation, focusing mainly on MATLAB/Simulink applications. Based on this, we can develop our own models and simulation programs which will help us to perform different driving dynamics simulations and to compare the performance, dynamic and energetic characteristics of these powertrains and their components to each other.
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Elektromos hajtású tanszéki versenyautó járműdinamikai modellezése
106-114Megtekintések száma:125A következőkben egy MATLAB környezetben kifejlesztett járműdinamikai szimulációs programot ismertetünk. A program a műszaki adatokból, mint bemenő paraméterekből, előállítja a jármű menetdinamikai függvényeit, és közvetve alkalmas a műszaki paraméterek optimalizálására. A programot a DE MK Gépészmérnöki Tanszékén tervezett és kivitelezett elektromos meghajtású versenyautóra már sikeresen alkalmaztuk.
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Manufacturing Process Optimization and Tool Condition Monitoring in Mechanical Engineering
72-89Megtekintések száma:146The optimization of manufacturing and production processes with various computer software is essential these days. Solutions on the market allow us to optimize and improve our manufacturing and production processes; one of the most popular software is called Tecnomatrix, which is described in this paper. Tool condition monitoring is a vital part of the manufacturing process in the industry. It requires continuous measurement of the wear of the cutting tool edges to improve the surface quality of the work piece and maintain productivity. Multiple methods are available for the determination of the actual condition of the cutting tool. Vibration diagnostics and acoustic methods are included in this paper. These methods are simple, it requires only high sensitive sensors, microphones, and data acquisition unit to gather the vibration signal and make signal improvement. Extended Taylor equation is applied for tool edge wear ratio. Labview and Matlab software are applied for the measurement and the digital signal processing. Machine learning method with artificial neural network is for the detection and prediction of the edge wear to estimate the remaining useful lifetime (RUL) of the tool.
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Measuring the Dynamic Characteristics of Electric Motors
359-364Megtekintések száma:108In our previous publications [1, 2], we described our vehicle dynamics simulation program which was developed in MATLAB environment. We also discussed its use for optimizing the technical parameters of electric driven vehicles. We detailed the model and simulation of the series wound DC motor which is part of the program. Besides, we described the experimental procedure by which we can determine the electromagnetic characteristics of the motor from the input parameters of the simulation program. In the present publication we deal with the determination of the dynamic characteristics of the motor (the moment of inertia of the rotor, bearing and brush resistance torques) experimentally. Knowing the above mentioned electromagnetic and dynamic characteristics, we can carry out the simulation of the motor and the results of the simulation can be compared to the results of the test measurements.
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Exhaust System Muffler Volume Optimization of Light Commercial passenger Car Using Transfer Matrix Method
132-138Megtekintések száma:184Nowadays, the automotive industry is focused on weight and size reduction. Main advantage of this weight and size reduction are improving the fuel economy. The specific fuel consumption of a vehicle can be improved through e.g. downsizing area of heat loss, if we focus on vehicle with weight reduction. Weight reduction can be done by replacing material or by changing the size (dimensions) of components. In the present work we have focused on Audi A6 muffler, troubleshooting and optimizing the muffler by changing pipe length of inlet and outlet, also by replacing the original mesh plate to porous pipe. Based on optimization, prototype has been built with the help of 3D design tool CATIA V5 and the calculations of transmission loss (TL) have been performed by MATLAB. Plane wave-based models such as the transfer matrix method (TMM) can offer fast initial prototype solutions for muffler designers. The principles of TMM for predicting the transmission loss of a muffler was used. Result of this present study of an existing muffler has been analysed and then compared with vehicle level test observation data. Noise level have been optimized for new muffler design. Other literatures were played significant rule for validate our results.
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Accuracy Analysis of Two Parallel Manipulators
38-45Megtekintések száma:87The aim of the study is to analyse and visualize the accuracy of two parallel manipulators. The kinematics are calculated using vectors and the Newton method. The accuracy is calculated based on the actuator errors, visualization is done with color shading. Calculations was done using MATLAB