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    Wyświetlanie 1-6 z 6
    Tytuł:
    Analysis of braking marks left by vehicles equipped with ABS with IR spectroscopy – different types of asphalt
    Autorzy:
    Sys, Ewa
    Kubiak, Przemysław
    Gosławski, Lukasz
    Zakrzewicz, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/1838312.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    IR spectroscopy
    accident investigation
    skid marks
    Opis:
    Detailed analysis of literature showed that there is no method that can be used in order to investigate skid marks left by vehicles equipped with ABS. Authors decided to identify braking trace by using IR spectroscopy. Preliminary studies have been performed and results were promising. Due to that fact authors decided to conduct detailed research where the influence of various factors on the possibility of revealing breaking traces would be taken into account. This article is the first in a series of articles taking into account the influence of various factors on the possibility of revealing breaking marks using IR spectroscopy. In this article the influence of the type of asphalt was studied. Authors conducted tests with the most popular types of asphalts used for the wearing course. 100 samples from 5 different types of asphalt were prepared. Each sample was measured 3 times to create its spectrum. The results were analyzed thoroughly using the dedicated SpectraGryph software. The analysis showed that for 4 out of 5 types of tested asphalt, the braking traces were visible at a wavelength of approximately 11 500 nm. Only for the rubberized asphalt there weren’t possibility to reveal skid mark.
    Źródło:
    Archiwum Motoryzacji; 2021, 93, 3; 5-14
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear method of precrash vehicle velocity determination based on tensor product of Legendre polynomials - luxury class
    Autorzy:
    Gosławski, Łukasz
    Sys, Ewa
    Mrowicki, Adam
    Krukowski, Mateusz
    Ma, Yanlin
    Kubiak, Przemyslaw
    Powiązania:
    https://bibliotekanauki.pl/articles/2056093.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    car crash reconstruction
    car accidents
    tensor product system
    inverse system
    EES
    Opis:
    Presented paper discusses a new, nonlinear approach to EES (Equivalent Energy Speed) parameter determination in frontal car collisions. This method is based on tensor product of Legendre polynomials and in this case considers Luxury car class. Methods that are used up till now are based on a linear dependency between mass, velocity and deformation. This is of course a simplification that was necessary, due to limitation in computation power of computers when this method was introduced decades ago. The contemporary resources allowed Authors to develop a much more sophisticated method. The mathematical model was developed using data shared by National Highway Traffic Safety Administration (NHTSA). This database covers a large number of test cases along with various information including vehicle mass, crash velocity, chassis deformation etc. New method proves to be more accurate than the currently used approach utilizing linear dependency of deformation force and deformation of the vehicle.
    Źródło:
    Archiwum Motoryzacji; 2022, 95, 1; 53--64
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Precrash vehicle velocity determination using inverse system and tensor product of Legendre polynomials - subcompact car class
    Autorzy:
    Gosławski, Łukasz
    Madziara, Szymon
    Droś, Bartosz
    Knap, Lech
    Ma, Yanlin
    Mrowicki, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/2134942.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    car
    crash
    reconstruction
    accidents
    Tensor Product System
    Inverse System
    EES
    Opis:
    Presented paper discusses new approach to EES parameter determination in frontal car crash based on the tensor product of Legendre polynomials. In this paper Subcompact Car Class was analyzed using that method. Data that was used to perform analyses introduced in this paper was taken from National Highway Traffic Safety Administration (NHTSA) database. Such database consists of considerate number of test cases along with various information including vehicle mass, crash velocity, chassis deformation etc. New approach to the problem of determining the EES parameter was necessary due to the low accuracy of the currently used methods. Linear models used up till now for accident reconstruction show significant error as the relationship between mass, velocity and deformation cannot be well approximated with a flat plane. Proposed model produces better results, because of the nonlinear dependence of said parameters. This paper also includes a calculation example presenting a comparison of linear and nonlinear method on an actual crash test.
    Źródło:
    Archiwum Motoryzacji; 2022, 97, 3; 14--24
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of braking marks left by vehicles equipped with ABS with IR spectroscopy
    Autorzy:
    Gosławski, Lukasz
    Kubiak, Przemyslaw
    Mrowicki, Adam
    Soghabatyan, Tigran
    Sys, Ewa
    Wang, Ying-Wei
    Zou, Tiefang
    Powiązania:
    https://bibliotekanauki.pl/articles/262935.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    accident investigation
    skid marks
    IR spectroscopy
    Opis:
    This paper presents the possible use for IR spectroscopy to reveal skid marks left by cars equipped with Anti-lock Braking System. Detailed analysis of literature showed that there is no method that can be used in order to investigate this kind of tire marks. Up till now only two techniques have been devised. The first one is Method of Image Refinement which consists of transforming the image from the scene of the accident using dedicated graphics software. Second method includes analysis of traces using a thermal imaging camera. This study presents an innovative approach to the problem. Numerous analyses using IR spectroscopy were conducted to check the suitability of this method. The research performed on a Thermo Scientific FTIR Nicolet iS50 Spectrophotometer with an ATR attachment. 40 samples from 10 different types of asphalt were prepared. Each sample was measured 3 times to create its spectrum. The results were analyzed thoroughly using the dedicated SpectraGryph software. Analysis show that the wavelength which makes the braking marks visible is found within the mid-infrared range. Finally, it was found wavelength in which skid marks should be visible. This range is located in the mid-infrared.
    Źródło:
    Archiwum Motoryzacji; 2019, 84, 2; 33-43
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear method of vehicle velocity determination based on inverse system and tensor product of Legendre polynomials - intermediate class
    Autorzy:
    Goslawski, Lukasz
    Gralewski, Jacek
    Krukowski, Mateusz
    Kubiak, Przemyslaw
    Manko, Maria
    Mrowicki, Adam
    De Sousa, Ricardo Alves
    Sys, Ewa
    Powiązania:
    https://bibliotekanauki.pl/articles/263641.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    location
    manufacture
    protection
    VIN
    Vehicle Identification Number
    vehicle originality
    Opis:
    Presented paper discusses two different nonlinear approaches to precrash velocity determination for vehicles from Intermediate Car Class. Data that was used to perform analyses introduced in this paper was taken from National Highway Traffic Safety Administration (NHTSA) database. Such database is comprised of substantial number of crash cases and main focus was put on frontal impacts. Hitherto used energy methods are based on linear model which proves to be inaccurate and producing significant errors. Presented considerations concern the inverse system and tensor product of Legendre polynomials. The focus of those methods is to establish the value of nonlinear coefficient bk which is the slope factor of precrash velocity Vt and deformation ratio Cs function.
    Źródło:
    Archiwum Motoryzacji; 2019, 83, 1; 133-149
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear method of determining the vehicle pre-crash speed based on B-spline with propabilistic weights - subcompact car class
    Autorzy:
    Kubiak, Przemyslaw
    Sys, Ewa
    Goslawski, Lukasz
    Manko, Maria
    Gralewski, Jacek
    Krukowski, Mateusz
    De Sousa, Ricardo Alves
    Mrowicki, Adam
    Soghabatyan, Tigran
    Zou, Tiefang
    Powiązania:
    https://bibliotekanauki.pl/articles/263553.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    air braking systems dynamic
    agricultural trailer
    braking system optimization
    air brake valve
    Opis:
    A new non-linear method utilizing the work W of car deformation is considered in this study. The car deformation is defined as an algebraic function of deformation ratio Cs. The method of variable correlation is exploited in order to develop experimental data. To determinate mathematical model parameters, data from the NHTSA database including frontal crash tests are used. Such database is comprised of substantial number of crash cases and main focus was put on frontal impacts. In the non-linear method used so far, the so-called energetic approach, collisions are considered non-elastic. The speed threshold defining the elastic collision was set to be 11 km/h. This simplistic approach is used to determine the linear relation of energy loss during deformation on deformation coefficient Cs. Deformation points C1-C6 are taken into account while calculating a mean value that defines this coefficient. A more accurate non-linear method as well as more complex form of deformation coefficient is suggested to determine the work of deformation in this paper. The focus of those methods is to establish the value of nonlinear coefficient b_k which is the slope factor of precrash velocity Vt and deformation ratio Cs function.
    Źródło:
    Archiwum Motoryzacji; 2019, 85, 3; 5-18
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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