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Rekonstrukcja i analiza przebiegu wypadku z udziałem pieszego przy wykorzystaniu programu V-SIM 5.0 – przykłady

Janczur Robert, Zawałeń Jolanta

Paragraf na Drodze

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2022

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Nr 2

47--61

PL

W artykule przedstawiono nową funkcjonalność programu V-SIM w wersji 5 i zwrócono uwagę na konieczność ujawniania wszelkich śladów na pojeździe i odzieży pieszego oraz wykorzystywania specjalistycznej wiedzy medyków sądowych, w celu jak najbardziej precyzyjnego ustalania pozycji pieszego w chwili uderzenia przez pojazd. Konfiguracja pozycji pieszego w modelu wielobryłowym zaimplementowanym w programie V-SIM oraz rzeczywiste sylwetki pojazdów 3D, mają fundamentalny wpływ na efekt symulacji potrącenia pieszego i jego pozderzeniowego przemieszczania się. Na przykładzie dwóch, dobrze udokumentowanych zdarzeń drogowych z udziałem osób pieszych, przedstawiono analizę symulacji i wrażliwości jej wyników na dane wejściowe pozycji pieszego oraz usytuowania jego kończyn dolnych i górnych. W podsumowaniu zwrócono uwag na elementy prawidłowego przygotowania symulacji w programie V-SIM 5.0, prowadzące do uzyskania miarodajnych wyników.

EN

The article presents the new functionality of the V-SIM program in version 5 and emphasizes the need to reveal, in particular, all traces on the vehicle and pedestrian's clothing, and to use the expertise of forensic medics, in order to determine the pedestrian's position as precisely as possible at the time of impact by vehicle. The configuration of the pedestrian position in the "multibody" model implemented in the V-SIM program and the real 3D body model of vehicle have a fundamental impact on the simulation of pedestrian impact and post-impact movement of a pedestrian. On the example of two well-documented road incidents involving pedestrians, the analysis of the mechanism of the simulation course and the sensitivity of the simulation results to a given input in the form of a pedestrian's position and the location of their lower and upper limbs is presented. In the summary, attention was paid to the elements of correct simulation preparation in the V-SIM 5 program, leading to obtaining reliable results.

2

Verification of sensors for yaw rate and lateral acceleration in car ESP system

Gajek Andrzej, Janczur Robert, Pieniążek Wiesław, Wolak Stanisław

Archiwum Motoryzacji

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2020

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Vol. 88, nr 2

61--76

EN

This study analyzed the possibilities to validate the indications of sensors for yaw rate and lateral acceleration within the scope of extended diagnostic routine of the car ESP system at Vehicle Inspection Stations. The stand tests were performed using the reference sensors and a standard diagnostic tester. The comparison of the yaw rate and lateral acceleration results obtained from the working sensor under examination, recorded with the Vbox unit, and the results from the reference sensor demonstrated a good conformity both in quality and quantity. But these tests demonstrated also a pure conformity (both in quality and quantity) with runs obtained from tester. The Root Mean Square (RMS) was used as factor of qualitative estimation. These inconveniences were caused by in sampling frequency incompatibility and lack of recording synchronization for signals from the tester and from reference sensors. The question of primary importance is a firmware modification for selected testers. Such a tester should be able to record signals from a reference sensor and have a set sampling frequency for signals from a working sensor. On the basis of already carried out research analyses the suggested frequency should be no lower than approximately 10 Hz. It resulted from a spectral analysis carried out for possessed runs maintaining the Nyquist limit frequency.

3

Urządzenie VBox Sport w praktyce biegłego i rzeczoznawcy samochodowego

Ciępka Piotr, Janczur Robert

Paragraf na Drodze

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2019

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Nr 4

63--73

PL

W artykule zaprezentowano urządzenie VBox Sport, produkowane przez Racelogic - firmę o uznanej pozycji światowej w obszarze produkcji urządzeń do pomiarów dynamiki samochodów. Autorzy wykonali próby samochodem osobowym, rejestrując parametry jego ruchu za pomocą tego urządzenia oraz dodatkowo za pomocą urządzenia VBox 3i, które jest powszechnie stosowane w badaniach dynamiki pojazdów. Porównując dane zarejestrowane tymi dwoma urządzeniami, autorzy wykazali, że urządzenie VBox Sport spełnia oczekiwania co do zakresów pomiarowych oraz dokładności i może być wykorzystywane w pracy biegłego zajmującego się rekonstrukcją wypadków drogowych i rzeczoznawcy samochodowego.

EN

VBox device, produced by Racelogic - a company of world renown as a manufacturer of the apparatus for car dynamics measurements is presented. The authors performed tests on a car to record the parameters of its motion with this device and, additionally, with VBox 3i, commonly applied in vehicle dynamics testing. The comparison of the data recorded with these two devices proved that VBox Sport meets the expectations as to the measurement ranges and accuracy and can be used by both a car expert and an expert witness in his/her reconstruction of accidents.

4

A method for the estimation of sideslip angle for a vehicle equipped with a one-antenna GPS measuring system for steady state movement

Pieniążek Wiesław, Wolak Stanisław, Janczur Robert

Archiwum Motoryzacji

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2019

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Vol. 84, nr 2

137--146

EN

One-antenna GPS systems present no possibility for the direct determination of vehicle slip angle. This is an easy task for dual antenna systems; however, many users have this kind of apparatus. In this paper, a method of estimation of this parameter, which is important for the estimation of vehicle steerability factors, is proposed (e.g. TB factor calculated on the basis of data from input test [8]). The method is based on two parameters measured by a one-antenna GPS system; these are the heading angle created from the Doppler channel coming directly from the GPS engine, and the yaw rate measured by an IMU device integrated and cooperating with the GPS engine. The sideslip angle which was calculated according to the proposed method is compared with an equivalent angle calculated on the basis of data from a non-slip measurement of velocity components for selected point of vehicle acquired using. The presented method is illustrated with examples from real tests. In the author’s opinion, the sideslip angle calculated with the application of measurement data obtained from a one-antenna GPS device could be used in practice. From comparison with another upper mentioned method, it follows that the differences between average values of sideslip angles obtained from both considered methods is not greater than 8%.