Rovers will continue to play an important role in planetary exploration. Plans include the use of the rocker-bogie rover configuration. Here, models of the mechanics of this configuration are presented. Methods for solving the inverse kinematics of the system and quasi-static force analysis are described. Also described is a simulation based on the models of the rover’s performance. Experimenta...

When railway vehicles run on sharp curves, the coefficient of friction (COF) between outer rail and leading-outside wheel flange a bogie is an important value related to problems such as wheel/rail severe wear, squeak noise arising from contact, running safety against flange-climb derailment. In general, it difficult grasp actual state COF, which changes moment during commercial operations. Fro...

Purpose. The work is aimed at determining the influence of lateral displacement a freight car bogie, taking into account value movement speed on its main dynamic indicators and interaction rolling stock track. Methodology. quantitative assessment was obtained by method mathematical computer modeling. design scheme takes peculiarities cars as part train: possibility all modes body vibration in s...

There have been numerous attempts and investigations carried out with the objective to reduce noise generated by railway freight wagons because is one of ever-present negative environmental pollution phenomena. This resulted in strong legislation requirements on reduction transport, case wagons, only exterior a problem. However, extremely hard metal structures running rails naturally generate h...

Railways as a dimension of transportation infrastructure has been widely welcomed in developed and developing industrial countries because of the ability to carry heavy loads over long distances, more safety, less depreciation, less cost, less pollution, etc. Therefore, knowledge of the dynamic behavior of the railway is essential for designers and builders. It is very important to study the vi...

Load spectrum plays a pivotal role for fault diagnosis and reliability evaluation. Here we performed long-term field tests to investigate the characteristics of load spectra bogie frame in high-speed train. With increasing steps classifications, reveal an apparent segmented feature spectrum. We propose new theoretical model, Weibull distribution, describe this characteristic. Contrast existing ...

A method for kinematics modeling of a six-wheel Rocker-Bogie mobile robot is described in detail. The forward kinematics is derived by using wheel Jacobian matrices in conjunction with wheel-ground contact angle estimation. Te inverse kinematics is to obtain the wheel velocities and steering angles from the desired forward velocity and turning rate of the robot. Traction Control also developed ...