The implementation of a digital system for automatic continuous control object, based on a physical model of the object using a thermal Scada Zenon system

Purpose. Develop a methodology for the implementation of digital control systems for continuous objects on a personal computer, which should provide: bringing the temperature in the chamber to a given value at a given range of air flow in the system; maintaining the temperature in the chamber at a given level at a given range of air flow in the system; visualization and control of the stand of the thermal object; control of fan speed in order to create a disturbing effect; registration of process parameters in the thermal object. The methods. The development is carried out through the phased implementation of a digital control system for a continuous object, implemented on a personal computer. The proposed approach consists of the main stages: a controller is synthesized in a continuous form, which implements the proportional-integral-differential (PID) control law. The simulation of the obtained system is performed in the mathematical package MATLAB. At the next stage on the personal computer the software implementation of the synthesized digital regulator is executed. At the last stage, the hardware elements of the control system were developed and implemented. Findings. The use of this approach in the development of a system of automatic control of a continuous object on the basis of a thermal object allows you to effectively create a complete hardware and software part of digital SAC using Scada system Zenon. This will significantly reduce the duration and cost of commissioning of ACS in production conditions at the actual control facility. Which makes it possible to significantly reduce the duration and cost of commissioning of ACS in production conditions at the actual control facility. The originality. For the first time, a method of creating a control system for thermal objects, based on programmable logic controller with the synthesis of the system in the mathematical package MATLAB. Practical implimintation. The obtained data allow to bring the model as close as possible to the real control system and to perform effective testing of its functioning in non-production conditions.

Geo-deformation polygon and geomechanical research at the mine Magnesitovaya

The Satka deposit features rockburst hazard. The critical depth for launching prevention of dynamic phenomena of strata pressure in underground mining is from level +180m downward. The Geodynamics and Rock Pressure Laboratory at the Institute of Mining, Ural Branch, Russian Academy of Sciences has designed a geo-strain control facility enabling prompt tracking and early response to variations in the stress state of rock mass using the automated monitoring system. The automated monitoring system allows real-time tracking of deformation processes. The control facility is additionally equipped with large-spacing flexible- wire gauging stations, slot-measuring stations and photoelastic strain gaging stations. The geo-strain control facility makes it possible to respond promptly to the changes in the stress state of rock masses. The mine personnel apply appropriate ground control techniques which ensure safety of mining. As a result, the static and dynamic phenomena of strata pressure are minimized, and, consequently, safety of underground mine personnel is improved.

Online Plasma Diagnostics in the Remote Spectroscopy Laboratory for Practical Training and Experimental Research

This paper deals with an integrated Internet-based education laboratory that allows both practical lab sessions and full-blown research projects to be carried out using state-of-the-art experimental facilities. The setup of a system that controls lab equipment via a global computer network is described, and a distributed hardware and software control facility supporting remote lab operations is considered in terms of its structural arrangement and component interaction. We present a computer-aided dispatch-and-information system that allows students to generate their own experiment scenarios, conduct experiments remotely, and store/process experimental results from their personal cabinets. We also discuss the peculiarities of developing a computerized system to support plasma spectroscopy hands-on education and research. Further emphasis is given to the laboratory modernization, regarding both hardware and result processing software.

Study of the relation between hydraulic jump and the flood water level in the river on the downstream of a spillway

Kuningan Dam which is located in Kuningan District, West Java has 21,8 km2 watershed area. This dam also acts as a flood control facility which functions supported by the reservoir’s topography and its spillway building. The spillway building releases excess water from the dam into the downstream area. In the downstream part of the spillway, usually, hydraulic jump phenomenon occurs which depends on the flood water level of the river. The hydraulic jump used in the designing process of stilling basin length. The stilling basin in the spillway building generally designed using Q100. The spillway in Kuningan Dam is designed as a closed conduit channel. In this study, the Kuningan Dam spillway is re-designed as an open channel using ogee type spillway. Based on the modeling result, the length of hydraulic jump that occurs when modeled with the return period discharge of Q25 is 21.54 m, Q50 is 16.65 m, and Q100 is 0.98 m. It is seen that in Q25 the jump was the furthest, so an elaborate study regarding hydraulic jump phenomenon and design standards of the spillway is required.

Flow analysis using RDDA method with actual usage in water distribution network

In the analysis of the water pipeline network, the amount of demand applied is assumed based on the valve being open 24 hours, unlike cases where water is supplied when the valve is opened and blocked when it is closed. As a result, existing analysis results and actual survey data show a lot of differences in hydraulic pressure and flow rate. Also, problems such as faulty outflow, lack of pumping capacity, low reservoir height, and failure to operate decompression facilities have been confirmed. In this paper, a real demand driven analysis method is proposed to solve these problems. First, a virtual flow control facility, a virtual low water column, and a virtual node are applied to the analytical model. In the next step, as the existing demand amount is used at the virtual node, if the water in the reservoir is below a certain level water is supplied from the flow control facility and the flow is shut off when the water level exceeds a certain level. This is a method to analyze the water pipeline network by supplying the usage amount.

EFFECTS OF DIFFERENT WEED CONTROL OF TECHNIQUES AND BIOSTIMULATORS ON ECONOMIC EFFICIENCY OF POTAOES GROWING

The aim of the study was to determine the effect of the differences weed contol techniques and biostimulators on ecinomic effciency of potatoes. Field studies were carried out in the years 2015-2017 using biostimulators in an individual farm in Międzyrzec Podlaski. The applied biostimulators increased the commercial yield of tubers by an average of 10.85 t/ha in comparison to the control without foliar feeding. The direct surplus was from 6,354.9 at the control facility to 14,879.8 PLN/ha on the premises where the Kelpak SL biostimulator was used.