Wyniki wyszukiwania - BazTech

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Metoda elementów skończonych w analizie drgań gruntu

Bednarz J., Brożek G., Targosz J.

Logistyka

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2010

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nr 6

PL

Celem artykułu jest przedstawianie metody analizy rozprzestrzeniania się fali drganiowej wymuszanej przez ruch tramwajów w gruncie, na którym planowane jest posadowienie wielokondygnacyjnego budynku mieszkalnego. Do wyznaczenia poziomu amplitudy drgań wykorzystano metodę elementów skończonych (MES) typu explicit. W analizie wykorzystano wyniki pomiarów amplitud przyśpieszenia drgań wykonanych przez pracowników Katedry Robotyki i Mechatroniki AGH w ramach projektu MNiSW o numerze 4875/B/TO2/2010/38 oraz wyniki wierceń badawczych wykonanych w celu zidentyfikowania składu gruntu w planowanym miejscu posadowienia budynku.

EN

This article presents analysis of propagation of vibration wave excited by the movement of trams in the soil on which is planned to built multi-storey residential building. To determine the amplitude of vibration the finite element method (FEM) explicit was used. The analysis uses the results of measurements of vibration acceleration amplitudes done by employees of the Department of Robotics and Mechatronics AGH during the works on government research project 4875/B/TO2/2010/38 and the results of drilling carried out to identify the composition of the soil at the planned place of foundation building.

2

Experimental Evaluation of Dynamical Measurements Accuracy Basing on the Length of Breaking Distance of a Motor Car

Lewandowski A., Waluś K., Dudziak M.

Machine Dynamics Problems

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2006

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Vol. 30, No. 2

96-102

EN

In the article there are shown the results of the experimental verification of dynamical parameters of car movement. The experimental verification was carried out by measurement of accelerations and angular velocity of car bodywork tilting using piezo-gyroscope and acceleration sensors. Besides for each test of intensive breaking there was statically measured the distance traveled by the car. There were carried out the statistical analysis and determined the measurement accuracy of designed appliance.

3

Evaluation of Influence of Measuring Signal Filtering Method on Accuracy of Vehicle Motion Kinematical Features

Dudziak M., Lewandowski A., Waluś K. J.

Machine Dynamics Problems

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2006

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Vol. 30, No. 3

98-108

EN

In new solutions of anti-lock systems in cars there can be observed the tendency of increasing of their acting frequency. It causes difficulties in registration of phenomena proceeded between a tire and a roadway using traditional measuring systems of which registration frequencies are too small. Quick development of acceleration's micro-sensors and piezo-gyroscopes creates new measuring possibilities including in its range frequencies generated by ABS appliances. Together with measurements frequency increasing there follows increasing of registered signals noises, what caused decreasing of their readability. Counteraction of this disadvantageous phenomenon requires using of signal filtration, which increasing readability of obtained accelerations courses does not cause loosing of important information included in this signal. In this article there is described a new measuring appliance based on acceleration microchips and a piezo-gyroscope cooperating with digital recorder and with original software. Here are shown results of road measuring tests of automobile's kinematical features and described influence of digital filters usage on accuracy of vehicle motion parameters.

4

Automatyczne odtwarzanie parametrów ruchu serwonapędów liniowych na podstawie pomiarów pośrednich przyśpieszenia

Małkiński W.

Prace Przemysłowego Instytutu Elektroniki

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2000

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nr 139

83-98

PL

W artykule przedstawiono metodę odtwarzania parametrów ruchu napędów pozycjonujących na podstawie pomiarów sygnału z akceleromenu umieszczonego na ruchomej części napędu. Całkowanie lub różniczkowanie numeryczne zarejestrowanego przebiegu przyspieszenia a(t) umożliwia uzyskanie w sposób automatyczny pozostałych parametrów ruchu: położenia s(t), prędkości v

EN

This article presents the method of defining the movement parameters such as position, velocity and jerk on the basis of measurement of the signal from accelerometer, placed on the moving part of the linear positioning system. The dynamic diagrams of position s(t), velocity v(t) and jerk(t) can be easily evaluated by numerical integration or differentiation of the registered acceleration a(t) signal. The method presented in the article is expected to be very useful for positioning systems, which are not equipped with internal position or velocity measuring systems.