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INTEGRATED MONITORING OF SLOPE PROCESS IN INDIA AND RUSSIA

Ganapathy G. P., Zaalishvili V. B., Chandrasekaran S. S., Melkov D. A.

The common approach to landslide prediction is the integration of the observed landslide displacements, soil properties, and rainfall estimation into predictive models. In general, monitoring the evolution of an unstable slope may provide valuable information to gain a better understanding of the active prediction and early warning processes for potential geodisasters. With this background an initiation has taken between India and Russia to develop cost effective methodology to monitor landslides under the Indo Russian Bilateral Collaborative Projects by DST- RFBR. Based on the hazard assessment The Nilgiris District in Tamil Nadu and Wayanad and Idukki Districts in Kerela area identified for further detailed study on monitoring Vulnerable slopes. On the territory of North Ossetia three sites of different mass volume and differenent activity rates were selected. Landslides that have not moved for years (for example Luarskiy landslide) commonly reactivate if ground water levels change dramatically, particularly when water penetrates old ground cracks, or construction activity creates slope modification that reduces stability.

Number of views: 311

POTENTIAL FOR ELECTRIC CONSUMPTION MANAGEMENT IN THE CONDITIONS OF AN ISOLATED ENERGY SYSTEM IN A REMOTE POPULATION

Yu. L. Zhukovsky, A. Yu. Lavrik, A. V. Semenyuk, O. S. Semenyuk

The aim of this work is to develop approaches for a methodology creation that allows estimate preliminary assessment of the power consumption management potential in the absence of experimental data on the object under actual load study. Analysis of diesel power plants operating modes in such systems showed that diesel generators often operate in suboptimal load ranges, which leads to increased diesel fuel consumption, reduction in diesel generators service life andas a result of poor diesel fuelcombustion in the cylinders or increased mechanical parts wear, etc. At the same time, electricity demand management technology used in large centralized power supply systems in some countries of the world can be adapted for use in isolated low power systems. Considering that diesel power plants are the sources of distributed generation in the power systems of hard-to-reach facilities in mountainous areas, demand management will allow to align the daily load schedule, plan the loading, start-ups and stops of diesel generators to improve the technical, economic and environmental performance of the entire complex. This paper proposes a technique that allows estimate preliminary assessment of the object shiftable electrical load share on the basis of "base" data about a typical similar object. The initial data isthe average electrical load daily schedules for each month of the studied object, for example, a settlement. The schedule of non-shiftable partof the studied object load is constructed by scaling the base non-shiftable load schedule depending on the selected method: the series values of base schedule can be multiplied by a coefficient so that one of the base schedule values becomes equal to the corresponding series value of the studied object load schedule, and other base schedule values were less than or equal to the corresponding values. According to the second method the base schedule values can be multiplied by a coefficient so that the series values at the selected hour (for example, evening maximum) were equal to the corresponding series value of the studied object load schedule. An example of methodology application is shown to estimate the demand response potential for electricity in the Amderma settlementresidential sector in Arkhangelsk region. It also shows the calculation results of technical, economic and environmental effect of the demand side management technology, due to electric load schedule alignment and, as a result, diesel generators operationin modes close to optimal.

Number of views: 292

PERSPECTIVES OF APPLYING WEBRTC FOR REMOTE-CONTROLLED MINING EQUIPMENT

A. A. Kravtsov, V. I. Anischenko, V. A. Atrushkevich, I. A. Pytalev

Currently a lot of mining companies, such as Caterpillar, Sandvik, Atlas Copco and Komatsu are developing solutions for machines remote control and mining process automation. The purpose of these technologies is to increase labor efficiency and safety. Solutions for remote control should establish secure connection and transfer data with low latency – this could be implemented with WebRTC technology. Several problems were revealed during open data analysis of Cisco, Sandvik, Moxa and Acksys remote control solutions – using of expensive IP-cameras, sophisticated network and security design. WebRTC could solve these and several other problems. WebRTC operation principles reviewed further: initial information exchange via signaling server, use of ICE for discovering shortest path between peers and establishing peer-topeer connection. This could simplify network design and allow to use more cheap USB cameras instead of IP-cameras. For security reasons WebRTC encrypts transmitted data with DTLS and SRTP algorithms. Encryption key fingerprints are exchanged over signaling server; after connection establishment, peers are exchanging keys itself over discovered route. But WebRTC specification does not define peer to signaling server communication, which may lead to breach in unsecure data channel, especially man-in-the-middle attack. To prevent this, software engineer should ensure that connection with signaling server is secure. Mining machine model was developed to test data transmission latency. In this model, Raspberry Pi single-board computer is responsible for wireless connection, video encoding and commands processing. Received commands are passed to Arduino controller, which operates electric engines controller. Three remote control scenarios were tested – model is near the operator and in direct line of sight; model is near operator, but not in direct line of sight; model and operator are far away from each other (over 1600 km), model controlled over Internet. Test results shows that transmission latency does not exceed 300 ms, which is suitable for real-time remote driving.

Number of views: 296

MONITORING OF THE DYNAMIC STATE OF AUTONOMOUS HEAVY PLATFORMS ON THE QUARRY ROUTES OF MINING ENTERPRISES

S. G. Kostyuk, I. V. Chicherin, B. A. Fedosenkov, D. M. Dubinkin

Purpose of work. The article presents the results of theoretical research and developments obtained at the Kuzbass state technical university on the implementation of current monitoring and bringing about signal processing procedures for the dynamic state of autonomous heavy platforms (AHP) on open pit mine routes. In order to obtain information about the generated current trajectories (CT) of unmanned mining dump trucks, in the software and hardware complexes of the computer-aided dispatching system (in the external control subsystem – ECSS  and the autonomous control subsystem – ACSS) installed on-board of an AHP, one-dimensional (scalar) continuous signals (hereinafter converted into discrete digital ones) with a time-dependent instantaneous frequency, the so-called chirp signals, are put in accordance with the current trajectories of the AHP. Research methods. This approach makes it possible to continuously monitor and manage the dynamics of current ATP trajectories with a high degree of efficiency. Note that for the purpose of information-rich and semantically transparent representation of information about the current state of the AHP CT, the chirp signals of the CT are converted into multidimensional Cohen’s class time-frequency wavelet distributions. The Wigner-Ville distribution (hereinafter referred to as the Wigner distribution) is selected as a working tool for performing computational procedures in the hardware / software module. This distribution is based on the Gabor basis wavelet functions and the wavelet matching pursuit algorithm. The choice of Gabor wavelets as the main ones is explained by their sinusoidal-like shape, since they are sinusoidal signals modulated by the Gauss window. On the other hand, the analyzed 1D-signals indicating the current position of the AHP on the route are also sinusoidal-like. This makes it possible to approximate current signals with high accuracy based on their comparison with the wavelet functions selected from the redundant wavelet dictionary. This approximation is adaptive, since it is performed on separate local fragments of the signal analyzed depending on approximating wavelets. This is the essence of the wavelet matching pursuit algorithm. The resulting wavelet series is then transformed into the Wigner time-frequency distribution, which is used to form a corresponding CT. Research results. As an example, reconstructions of time-frequency distributions (TFD) are given, corresponding to the deviation of a certain CT to the left (the trajectory signal decreases exponentially) and to the right (the CT-signal increases) from the nominal axial trajectory (NAT). The calculated scalar signal and its TFD for the AHP CT deviating to the left from NAT are also presented. In addition, on the basis of theoretical explanations the calculated linear-increasing TFD is demonstrated, corresponding to the CT-deviation to the right from NAT, and the time invariant stationary TFD characterizing the movement of AHP along the NAT line.  Сonclusion. Based on the results obtained, it is concluded that the most appropriate ways to monitor the current trajectories of AHP movement and procedures for processing the corresponding signals are the operations implemented in computer-aided subsystems of external and autonomous control and based on such concepts as the Cohen’s class wavelet distributions, Gabor redundant dictionary of wavelet functions, the wavelet matching pursuit algorithm, and the representation of technological chirp-signals, as well as frequency-stationary signals about the current AHP trajectories represented in the wavelet medium. In this connection, the authors concluded that the procedures realizing the current monitoring of AHP movement on open pit mine   routes and implementing the process of analyzing a relevant dynamic change in curre

Number of views: 271

INTERDISCIPLINARY ASPECTS OF SUSTAINABLE DEVELOPMENT OF MOUNTAIN TERRITORIES: THE ROLE OF SOCIO-CULTURAL FACTORS

A. N. Gunya, E. A. Khadzaragova, V. N. Khetagurov, Yu. I. Karaev

The purpose of this work is to analyze the role of culture in the sustainable development of mountain areas in different regions and with different approaches to reflecting this topic of research in scientific publications. The analysis is based on two thematic issues of the journals Sustainable Development of Mountain Territories (SDMT) and Mountain Research and Development (MRD), which focus on the role of culture in mountains. The joint thematic issue was based on the task to reflect the contribution of cultural factors to the sustainable development of mountain areas, as well as the expansion of scientific exchange between communities speaking different languages. Last but not least, it was important to reflect the difference in approaches and methods of “visualization” of scientific thought in the West and in Russia, integration and contextualization of knowledge, which is crucial for ensuring sustainable development in the global aspect. In total, 13 articles were analyzed (4 in the SDMT and 9 in the MRD). The parameters for analysis and comparison were: thematic focuses of articles, regions covered, a set of keywords, goal formulation, concepts. 9 articles cover the mountains of Asia (Caucasus – 3, Himalayas – 2, Tibet and its eastern mountain frame – 2, Mountains of Siberia – 2), two articles each are devoted to the Alps and Andes. Comparison of the analysis of articles on the role of culture in the mountains, presented in the Russian and Swiss journals, showed both similarities in assessments of the role of culture in sustainable development and differences in approaches and depth of analysis of empirical data. The articles recognize the fundamental importance of culture for sustainable development in mountainous regions and preventing the destruction of mountain communities with unique environmental management systems. The initiative to jointly produce articles on such an important topic as the role of culture in the mountains contributes to global efforts to generate knowledge, demonstrating how to integrate the cultural component into development practice and policy. This is in line with the goals and objectives of UNESCO, in particular with efforts to develop indicators for the cultural dimension of development.

Number of views: 290
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ISSN 1998-4502 (Print)                                                            ISSN 2499-975Х (Online)