[17.04.2023]
Implementation of Test Track No. 4 is going completely in accordance with plan: construction work has been completed here and a new model of a passenger rail electric vehicle has arrived – the 25-seat uBus Carat.
At the moment, two main tasks are being carried out: commissioning work on the overpass and commissioning work on the Carat. If we describe these operations in more detail, it would look like this.
After the string-rail overpass installation is completed (intermediate and anchor supports, electrified two-rail track structure, etc.), it is required to collect all the data to determine the string rails position in space. These parameters include:
deflections of rails and supporting strand at different temperatures (accounting for heating of the structure in the sun);
dimensions of transport approach;
position of intermediate and anchor supports with the design loads applied, pretensioning forces and uBus weight.
In other words, we must check how the as-built construction meets the design requirements. In case of deviations, appropriate decisions must be made to eliminate those.
Also needed to be understood that at this stage all the structures are evaluated: quality of design, manufacture, assembly and installation. On the other hand, it is necessary to know the trajectory of the string rail raceway, which determines such fundamental parameters as track smoothness and ride comfort. After all, all of the engineering solutions are aimed at one thing: creating a perfectly smooth trajectory of the rail electric vehicle.
Trajectory of the uBus Carat wheel paths (raceways) is a parameter that determines safety, comfort, travel speed, noise and much more. And at this stage of the project implementation, we are doing everything to ensure the minimal difference between theory and reality.
In turn, for the 25-seat electric car on steel wheels, commissioning means debugging control, motion stabilization, braking (regular and emergency), safety and comfort systems. This is kind of a process of teaching the rolling stock to “see” the rail track structure, record data, including traffic obstructions, and respond in accordance with the established algorithm for safe motion.
Data obtained during the commissioning is not just numbers, it is knowledge and experience translated into real values, as well as continuation of work on the certification of the uSky transport and infrastructure complex. This is a symbiosis study of two independent systems: the rail-string transport overpass and the steel wheel passenger electric car. After all, the result of this interaction will be a next generation transport system at the “second level” – the overpass type.
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