Читать книгу Intelligent transport systems development - Vadim Shmal - Страница 5

Intelligent transport systems (ITS) are the result of the system integration of modern navigation, information and communication technologies, automation, transport infrastructure, user facilities, focused on ensuring the safety and efficiency of the transport process, logistics, and improving comfort for drivers and passengers.

Many countries already have experience in creating intelligent transport systems. Thus, since the early 1980s, the United States, European countries and the Asia-Pacific region have been implementing programs focused on information technology for high-speed highways. Currently, the global ITS market continues to develop dynamically.

The creation of a unified information infrastructure of the transport complex is especially important for the Russian Federation, located in nine time zones and actively using all types of transport.

Already today, GLONASS satellite navigation technologies are used in almost all areas of human activity. These are law enforcement, security and search systems, coordinate and time support, monitoring of complex engineering structures, dangerous goods and various types of transport, people and animals, geodesy and cartography, agriculture, construction, synchronization of telecommunications and energy networks, hydrometeorology, etc.

Developing the concept of ITS of Russia, it is necessary to take into account the possibilities and prospects of modernization of the domestic global navigation satellite system GLONASS. Satellite navigation is the technological basis of intelligent transport systems. This is a unique Russian satellite navigation system in terms of coverage and significance.

Due to the peculiarities of the ballistic construction of orbital groupings, the GLONASS system surpasses GPS in high latitudes in terms of availability and is somewhat inferior in the equatorial zone. Currently, a new generation Glonass-K satellite with additional navigation signals at the L3 frequency and code separation is undergoing flight tests as part of the GLONASS orbital constellation, which will improve the accuracy of navigation definitions by using more broadband signals in the frequency ranges allocated for the GLONASS system. At the same time, within the framework of international cooperation, code separation can ensure the compatibility and complementarity of existing and emerging global and regional satellite navigation systems.

To improve the quality of navigation services provided to consumers, a set of functional additions to the GLONASS system is designed, which is an element of the general system. It provides consumers with information about the integrity of the navigation field, updated ephemeris-time information, corrective information for navigation measurements, as well as information about the quality of the functioning of GLONASS and GPS.

Complexes of functional additions by the size of the territory of action can be classified into local (150 km), regional (1000 km), wide-band (up to 5000 km).

An example of a wide-band system of functional additions is the system of differential correction and monitoring of radio navigation fields (SDCM). The Russian SDCM is a functional addition to the GLONASS and GPS satellite navigation systems, which improves their characteristics for solving tasks requiring high accuracy and reliability.

The SDCM includes a measurement collection complex, including measurement collection stations on the territory of the Russian Federation and abroad, a SDCM center and a complex for delivering information to consumers.

The primary measurement information is sent to the SDCM center, where it is processed in order to clarify ephemeris-time information, determine the integrity parameters of the navigation-time field and form a message for the consumer.

SDCM messages will be delivered to consumers via satellite and terrestrial data transmission channels. The basis of the orbital grouping (OG) SDKM will be the spacecraft of the multifunctional space relay system «Luch» in geostationary orbit.

The SDCM orbital grouping will ensure guaranteed delivery of corrective information to consumers almost throughout the Earth, with the exception of the polar regions and the North American continent.

Simultaneously with the creation of space channels for the delivery of SDCM information, a website providing operational and a posteriori data for monitoring the state of GLONASS and GPS navigation and time fields was put into trial operation. The SDCM information transmission system is being tested over ground communication channels. This will allow you to work out, check and confirm the characteristics of the information generated by the SDCM, without waiting for the launch of the Luch spacecraft.

The commissioning of the SDCM significantly increases the accuracy of navigation definitions. So, if the accuracy of determining the coordinates by the consumer in units of meters is provided in offline mode, then when using information about the SDCM, the accuracy reaches a centimeter level.

In addition, the SDKM will allow solving the tasks of monitoring road transport, drivers’ compliance with traffic rules, boarding and disembarking passengers of a public transport port in designated places. With the help of SDCM, the tasks of monitoring the location of railway trains on adjacent tracks, optimizing the management of shunting locomotives in the areas of marshalling yards and railway junctions will also be solved at a new qualitative level.

For water transport, the SDCM will simplify the solution of the tasks of pilotage of ships, accurate and prompt installation of signs of the navigable situation. With the help of SDCM, the tasks of automating the landing of air transport will be solved. SDCM information will also be in demand for monitoring the processing of the roadway, accurate and operational linking of construction sites in absolute coordinate systems, monitoring and control of the condition of complex engineering structures.

The combine use of information systems and navigation technologies will make it possible to effectively solve the tasks of monitoring facilities and resources to improve the quality of life of the population, ensure high rates of economic growth and competitiveness of the national economy, create potential for future development, increase the level of defense capability and security of the state.

One of the most popular areas of satellite positioning is the monitoring of mobile objects, such as vehicles, people with physical and age disabilities, children.

Being important elements of ITS, vehicle monitoring systems can improve the quality of public transport services, the safety of passenger and cargo transportation, the efficiency of transport management, control fuel consumption, technical parameters of special equipment, cargo safety, etc. Practice shows that the use of such systems at the enterprise increases the efficiency of using vehicles by 10—40%.

According to statistics, more than 1 million people per year die as a result of road accidents in the world. In this regard, JSC «Russian Space Systems» submitted to the Commission for Modernization and Technological Development of the Economy under the President of the Russian Federation the project Emergency Response System in case of accidents «ERA-GLONASS», aimed at reducing the severity of the consequences of road accidents. A similar system is already being developed and implemented in the European Union. Thanks to the equipment of the vehicle with automated navigation terminals of domestic production, transmitting emergency response services information about the accident, including the coordinates of the vehicle, the time interval between the incident and the provision of assistance to victims is reduced.

Systems where the objects of monitoring are technical means should also include monitoring systems for small aircraft. Their use will make it possible to obtain a significant economic effect, but most importantly, it will contribute to saving human lives and radically reducing financial costs in the aftermath of plane crashes.

To determine the displacements of structural elements, high-precision monitoring of the displacements of engineering structures (HMDES) using GLONASS signals is used. The HMDES program allows you to determine offsets with millimeter accuracy. Based on the data obtained, an analysis is carried out and, if necessary, a decision is made on emergency measures to prevent an emergency situation or evacuation of the population. In addition, the system of high-precision monitoring of displacements of engineering structures can be used to monitor displacements of the Earth’s crust and tectonic processes.

There are many examples of using satellite navigation technologies to improve the efficiency of almost all modes of transport, each of which develops its own corporate information systems aimed at solving internal problems. Unfortunately, the lack of unification during their creation and implementation made these systems autonomous, excluding intersystem interaction and centralized management.

In our opinion, the most expedient way to solve the unification problem is to develop a system of standards that, on the one hand, would allow each application to have its own optimal solutions and communication channels, and on the other – unified network protocols. This would make it possible to serve various modes of transport and ensure efficient intermodal transportation within a single information infrastructure.

In addition, today there is a need to create a unified transport system of a new generation. Regional navigation and information systems (RNIS) based on GLONASS technologies should be used as its basis. For the first time the concept of RNIS was introduced by JSC «Russian Space Systems» in 2003 when creating a Regional navigation and Information System of the Yaroslavl region.

The priority areas of the ITS concept in Russia include:

■ consolidation of resources, technologies and qualified personnel in the field of navigation and transport telematics;

■ introduction of ITS in large cities, development of the federal road network and construction of toll roads with mandatory deployment of modern ITS components;

■ formation of international transport corridors harmonized with European ITS standards.

Integration into international intelligent transport systems will allow creating a unified, highly needed harmonized global ITS for consumers, which will increase the competitiveness and economic efficiency of the Russian transport sector, the safety of freight and passenger transportation.