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Analysis of transverse stability parameters of hybrid buses with active trailers

Sakhno V., Poliakov V., Murovanyi I., Selezniov V., Vovk Y.

Zeszyty Naukowe. Transport / Politechnika Śląska

2018

z. 101

185--201

The objective of the article is to determine the transverse stability indexes of hinge-connected buses (HCBs) by applying the computation-analytical method. The transverse stability parameters of hybrid buses with active trailers are analysed. Based on these parameters (the angles of the roll and redistribution of loads on the sides), the analytical dependences are developed. The dependences describe the movement of the parts of HCBs in the vertical plane. Considering the action of longitudinal and transverse forces, the roll angles of the bus and the trailer were determined. The limiting angle of the side roll of the bus rollover was found to be γамах = 27.560γмах, and the trailer rollover to be γамах = 30.210. The obtained transverse stability indexes of HCBs with a hybrid power plant testify to the compliance with the standard DSTU UN/ECE R 111-00.

Lorry convoy stability taking into account the skew of semitrailer axes

Sakhno V., Poliakov V., Timkov O., Kravchenko O.

Transport Problems

2016

T. 11, z. 3

69--76

The mathematical model of a saddle-type lorry convoy is improved taking into account the skew of the axes of a semitrailer. It is shown that the motion of a lorry convoy without the skew of the axes is asymptotically steady. The skew of any axis of a semitrailer results in the worsening of stability of the rectilinear motion conditioned by the oscillations of the towed link.

Усовершенствована математическая модель седельного автопоезда с учетом перекоса осей полуприцепа. Показано, что движение автопоезда без перекоса осей является асимптотически устойчивым. Перекос любой оси полуприцепа приводит к ухудшению устойчивости прямолинейного движения, обусловленного колебаниями прицепного звена.

Increase of noise immunity of laser smoke fire detectors

Kitsak A., Esipovich D., Poliakov V.

Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej

2011

Nr 42

123--126

The article describes of the optical system of the proposed smoke detector construction, in which lightening of a smoke chamber is made by a focused laser beam having, according to the periodic law, a modulated spatial distribution of radiation intensity in the focal spot. This structure of the light field in the smoke flow allows to generate the algorithm of signals selection produced by the smoke particles with characteristic sizes and velocities. The result is increased stability of the smoke detector under the influence of external noise such as dust, vapor with different sizes of smoke particles and/or velocities. There are carried out model experiments on registration of time signals that are generated by particles of different sizes, crossing the plane of the beam focusing. The spectral characteristics of the recorded signals are researched. There are identificated possible algorithms for selection of signals generated by micro formations with specified medium size and speed of movement.