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Selection of signal registration points in the monitoring process and diagnosing the condition of the rail vehicle

100%

Chudzikiewicz A. , Stelmach A. , Wawrzyński W.

Journal of Civil Engineering and Transport

2019

tom Vol. 1

7--13

The article discusses the process of selecting points on a rail vehicle in which sensors recording signals will be located, with a view to their later use in the process of monitoring the condition of the vehicle and in particular elements of the first and second degree suspension system. The number of such points and their location is significant considering the complexity of the monitoring system and thus the costs of its construction and subsequent operation, as well as the possibility of using registered signals in the process of diagnosing the technical condition of the vehicle, bearing in mind the functioning of such a system in online mode.

W artykule omówiony został proces wyboru punktów na pojeździe szynowym, w których ulokowane będą czujniki rejestrujące sygnały, mając na uwadze późniejsze ich wykorzystanie w procesie monitorowanie stanu pojazdu a w szczególności elementów układu podatnego I i II stopnia usprężynowania. Liczba takich punktów oraz ich rozmieszczenie ma istotne znaczenie biorąc pod uwagę złożoność systemu monitorowania a tym samym koszty jego budowy i późniejszej eksploatacji a także możliwość wykorzystania zarejestrowanych sygnałów w procesie diagnozowania stanu technicznego pojazdu mając na uwadze funkcjonowanie takiego systemu w trybie on-line.

Modeling and simulation of a control system of wheels of wheelset

88%

Chudzikiewicz A. , Gerlici J. , Sowińska M. , Stelmach A. , Wawrzyński W.

tom Vol. 55, iss. 3

73--83

Modern light rail vehicles, such as a tram or rail bus, due to the need to provide mobility for the elderly or disabled people and the requirements of operators operating passenger rail transport or transport in urban areas must have a 100% low floor. Structurally, this is associated with the use of wheelset with independently rotating wheels (IRW) in such vehicles. It is also possible to use a bogie structure without the use of a wheelset axle by mounting the wheels directly in the side parts of the bogie frame. This construction is more complex and will not be discussed in this article. Bearing in mind the dynamic behavior of such vehicles during operation (lateral stability, profile wear) in various driving conditions (curve traffic, crossovers) and taking into account operating costs, it becomes necessary to install wheel rotation control systems to maintain center movement mass of the wheelset around the centerline of the track. The subject of the article will be considerations on modeling and simulation of rail vehicle bogie motion with IRW sets including the wheel control system. Nominal and mathematical models of the analyzed vehicle will be presented, as well as a controlled strategy based on the comparison of the angular velocities of the wheels of the wheelset A review of works on solutions of such systems will be presented, and a control concept will be proposed. The summary contains conclusions regarding the possibility of practical use of the proposed method of steering wheels of a wheelset in the case of independently rotating wheels.