METHOD ENSURING ACCESS TO INFORMATION TECHNOLOGICAL RESOURCES OF AUTOMATIC CONTROL SYSTEM BY WATER SUPPLY COMPANY

2016 ◽  
Vol 2016 (2) ◽  
pp. 167-174
Author(s):  
Михаил Рытов ◽  
Mikhail Rytov ◽  
Сергей Шпичак ◽  
Sergey Shpichak
Keyword(s):  
Control System ◽  
Water Supply ◽  
Automatic Control ◽  
Control Systems ◽  
Communication Channels ◽  
Access To Information ◽  
Access Policy ◽  
Automatic Control Systems ◽  
Water Supply Company ◽  
Blom's Scheme

The problems of access control to information and technological resources of automatic control systems for water supply companies are considered. The formalized model of the process of reliable access to information and technological resources is shown. The model takes into account the existence of a multitude of communication channels and a possibility of the organization of the operative cross access. A method to ensure a reliable access to information and technical resources of automatic control systems by water supply companies on the basis of the access policy combination, a scheme of deposit and a preliminary distribution of access authenticators. As a base example there was adopted Blom’s scheme. The method allows ensuring an operative cross access in case of emergency. To ensure an operative access in the method mentioned there was used a scheme of a complete division of a secret in the combination with authenticator evolution. As a basic example the evolution of authenticators based on Lamport’s protocol is considered.

scholarly journals Synthesis of Boiler Controllers of the Automatic Power Control System of Power Units

2020 ◽  
Vol 63 (3) ◽  
pp. 223-235
Author(s):  
G. T. Kulakov ◽  
K. I. Artsiomenka
Keyword(s):  
Control System ◽  
Power Control ◽  
Automatic Control ◽  
Control Systems ◽  
Fuel Consumption ◽  
Power Unit ◽  
Power Controller ◽  
Automatic Control Systems ◽  
Automatic Power Control

The article concerns the problem of structure-and-parametric optimization of a cascade automatic control system (CACS) by an example of a boiler power controller and a fuel controller. This CACS, which is a part of automatic control systems for power units, consists of two loops, viz. of an inner loop (which purpose is stabilization of the system) and an outer loop (designed for the adjustment) and, also, of two controller, viz. an outer controller (which is a basic one) provided for stabilization of the output value of the object (in our case, of the actual power unit capacity) and of an inner controller (which is an auxiliary one) provided to regulate fuel consumption. The internal controller builds up the control action with the aid of the boiler load controller of the power unit. As compared to single-loop automatic control systems, the cascade  system provides better quality of transient control due to the higher performance of the internal loop of the system. This advantage is especially noticeable when compensating for disturbances that come through the channel of regulating impact. The article presents two methods of setting, viz. the fuel controller and the boiler power controller. The application of these methods can improve the quality of power control and reduce fuel consumption in transient modes in comparison with the setting of these controllers of a typical power unit automatic power control system. The results of computer simulation of transient processes in CACS for input step surge and internal perturbation confirm the advantages of the methods are presented in this article.

scholarly journals DEVELOPMENT OF STRUCTURAL SCHEMES AND OPERATION ALGORITHMS FOR THE AUTOMATIC CONTROL SYSTEM OF A MULTIFUNCTIONAL ENERGY COMPLEX

2021 ◽  
Vol 445 (1) ◽  
pp. 82-90
Author(s):  
G. Kalimbetov ◽  
A. Toigozhinovа ◽  
W. Wojcik
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Dynamic Control ◽  
Control Object ◽  
Control Device ◽  
Automatic Control Systems ◽  
Operating Modes ◽  
Quality Of Control

Among the promising automatic control systems, logical-dynamic control systems that change both the structure and parameters of the control device using switches formed on the basis of a certain logical algorithm have proven themselves well. The use of logical algorithms as part of MACS subsystems for complex technical objects makes it possible to increase the static and dynamic accuracy of control due to purposeful qualitative and quantitative changes in the control signal. This approach will give the control system fundamentally new properties that allow to fully take into account the nature and dynamics of the movement of the control object. When developing existing logical control algorithms, the issues of their application for multi-connected and multifunctional objects control were not considered. Common to existing logical algorithms is that when switching the structure and/or changing parameters, only the dynamics of its own subsystem is taken into account, which is unacceptable in the case of multi-connected dynamic object control, since cross-links have a significant impact on the quality of control. Thus, the problem of synthesis of logical algorithms for multi-connected objects control is an actual theoretical and applied problem. Despite the considerable amount of research conducted in this area, the application of logical algorithms for complex multidimensional objects control is not sufficiently considered, and there is no unified design concept for this type of MACS, taking into account the required quality of functioning in various operating modes. In this regard, there is a need to synthesize algorithms for logical multi-connected control that form control signals in order to coordinate the actions of all separate MACS subsystems in accordance with new external conditions and operating modes. The problem under consideration determined the purpose of this work and the research objectives.

scholarly journals CONCEPT OF AUTOMATIC CONTROL SYSTEM FOR IMPROVING THE EFFICIENCY OF THE ABSORPTION REFRIGERATING UNITS

2017 ◽  
Vol 8 (4) ◽  
Author(s):  
O. Titlova ◽  
V. Khobin ◽  
O. Titlov
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Production Process ◽  
Control Systems ◽  
Heat Loss ◽  
Automatic Control System ◽  
General Concept ◽  
Ammonia Vapor ◽  
Automatic Control Systems

The general concept of the automatic control systems constructing for increasing the efficiency of the artificial cold production process in the absorption refrigerating units is substantiated. The described automatic control systems provides necessary degree of the ammonia vapor purification from the water in all absorption refrigerating units modes and minimizes heat loss from the dephlegmator surface.

Automatic Control Systems for Adaptive Optical Systems: Analytical Review. Part 1: Adaptive Optical System Control of Onboard Laser Installations

2018 ◽  
pp. 51-68 ◽  
Author(s):  
Yu. I. Shanin ◽  
A. V. Chernykh
Keyword(s):  
Control System ◽  
Laser Beam ◽  
Automatic Control ◽  
Wave Front ◽  
Control Systems ◽  
Turbulent Atmosphere ◽  
Single Channel ◽  
Optical Systems ◽  
Automatic Control Systems ◽  
Analytical Review

The first part of the analytical review presents an introduction to automatic control systems (ACS) for the adaptive optical systems (AOS) and control of tip-tilt correctors to eliminate a laser beam jitter. Considers a composition and a purpose of the AOS basic components. Also gives the AOS schemes to be used to form the sharper object images and focus radiation on a target when propagating a laser beam in a turbulent atmosphere. Briefly discusses the general issues of the AOS control, namely single-channel and multichannel linear control, bandwidth limitations of the control system, and possible signal paths in ACS of AOS.The article in-detail describes a path of the harmonic signal through the units of the feedback control loop as applied to the plane mirror of a two-channel corrector of the wave front tip-tilt. Provides guidelines to select the minimum quantization time for a propagating digital signal.Considers the certain problems of constructing ACS to be applied to AOS of the on-board laser installations. A simulated installation model where light passes through a turbulent atmosphere allowed us to develop a linear quadratic Gaussian controller (LQG-controller). Using this controller the optimal control (i.e. minimizing the dispersion of the output signal measured) with good robustness of the tip-tilt corrector is carried out.The concluding part of the review presents the certain research results of the AOS control when compensating the laser radiation wave front perturbations caused both by an aero-optical problem, arising when radiation propagates near the walls of an aircraft and by an atmospheric turbulence of free airflow. The influence of a small time delay (within one sampling step), when transmitting a control signal, on the control system operability was under special consideration.

scholarly journals MODELING OF A SYSTEM FOR AUTOMATIC REGULATION OF THE TENSION MODE IN THE ROUGHING GROUP OF STANDS OF A CONTINUOUS SECTION MIL

2021 ◽  
pp. 67-73
Author(s):  
Ivan Marynych ◽  
Olga Serdiuk
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Automatic Control System ◽  
Rolling Mill ◽  
Rolling Speed ◽  
Automatic Regulation ◽  
Automatic Control Systems ◽  
Rolling Mode ◽  
Uneven Heating

The subject of the research is automatic control system modeling features for tensioning of stands roughing group, which takes into account changes in the rolling speed at exit of the previous stand and entrance to the next stand. Control systems for high-speed rolling on section mills are the most critical systems, since the trouble-free operation of rolling mill largely depends on their work. Rolling speed control is understood to mean tension regulation in the roughing group of stands and stabilization of the rolling loop in the finishing groups. The influence of such technological factors as uneven heating of blanks, change in the crimping mode in stands, etc. leads to the appearance of tension or back-up forces, deviation of rolled loop from the specified values. Tension rolling, in contrast to loop rolling, is a stable rolling mode. However, (at significant values of tension in the rolled products) such a rolling mode leads to different thicknesses of the finished product. The loop rolling mode is an unstable mode and is impossible without automatic control systems. Both in the tension rolling mode and in the free rolling mode with a loop, it is necessary to study automatic control systems in order to determine the possibilities of compensating for disturbing influences and obtaining rolled products of the given accuracy. Therefore, the main task of the automatic control system is to maintain the rolling mode with the lowest possible tension. To achieve this goal, direct control of the tension of the rolled strip with modern technical means is rather difficult, and the operation of tension control systems is based on indirect methods of measuring it, and the study of the system efficiency is reduced to modeling the process itself. The developed model consists of three stands and two inter-stand spaces, since it takes into account changes in rolling speed at the exit of previous stand and the entrance to the next stand. It is due to this that adequate simulation results are obtained that are close to the real rolling process. Keywords: automation, rolls, stand, inter-stand spacing, modeling, loop tension, rolling mill, roughing group.

scholarly journals Fuzzy Logic as A Method of Decision Making in Automatic Watering Plants

2016 ◽  
Vol 2 (1) ◽  
pp. 15
Author(s):  
T. W. Matha ◽  
Agung Nugroho Jati ◽  
F. Azmi
Keyword(s):  
Decision Making ◽  
Fuzzy Logic ◽  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Weather Forecast ◽  
Automatic Control Systems ◽  
Weather Information

In this era of technology, the use of automatic control systems can provide some benefits in terms of efficiency, accuracy, and safety compared to that of manual workmanship. This study tries to create a control system that can perform automatic plant watering system to help us in watering plants. In this study, weather forecast and weather shield are integrated with microcontroller as to gather weather information in the area around the plants. The information is then compared for decision making in automatic watering. This study is derived from the growing popularity of the hobby to grow plants in community. However, the constraint of time and distance in growing plants becomes one of the problems for people who are busy with their activities so that they do not have time for watering plants.

scholarly journals Laboratory stand with wireless interface for investigation of automatic control systems of dc electric drives

2021 ◽  
pp. 24-36
Author(s):  
Е.М. Kulynych ◽  
O.S. Nazarova ◽  
D.V. Goncharov ◽  
S.G. Chernyshev ◽  
V.V. Piskun
Keyword(s):  
Motor Control ◽  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Dc Motor ◽  
Electric Drives ◽  
Automatic Control Systems ◽  
Transmission Of Information ◽  
Dc Motor Control ◽  
Wireless Interface

Purpose. Development of a laboratory stand with a wireless interface for the study and research of automatic control systems for DC electric drives. Methodology. Physical experiment on the developed laboratory bench, computer modelling, calculation and analytical methods. Findings. The study considered and analyzed the advantages and disadvantages of existing developments of laboratory stands with virtual and remote components, the possibility of organizing a wireless interface, taking into account cost-effectiveness, mobility, reliability and simplicity, as well as the possibility of using as a training stand. The connection of the stand by means of USB and Wi-Fi is developed. The STM32F103C8T6 microcontroller is used for the power switch and the automatic control system. The interface part consists of a NodeMCU board, a MicroSD card module, an interface control unit, a 16x2 LCD and an I2C converter. The UART-USB interface is used for information transfer and programming of the stand. The possibility of current remote transmission of information about the modes and parameters of the engine to a computer with a browser output by installing the Wi-Fi module ESP8266MOD. A closed system of automatic DC motor control with PID current regulators and EMF has been developed. Experiments were performed with a pulse and smooth increase in motor speed and variation of the components of the PID controllers using the control panel of the laboratory stand. All graphs of the results of the experiment were obtained on a web page with a fixed IP address in the browser via Wi-Fi. Originality. The structure of the remote monitoring and control system based on hardware and software combination of telecommunication and measuring systems is proposed and developed, which differs from the existing ones by the presence of current wireless transmission of information, which allows to remotely receive research data of automatic DC motor control systems. Practical value. The developed laboratory stand with the wireless interface allows to receive and store experimental data on parameters of the investigated engine in real time remotely.

scholarly journals Choosing parameters of vessel’s course automatic control system under the influence of water-wave disturbances

2020 ◽  
Vol 26 (1) ◽  
pp. 27-40
Author(s):  
Максим Валерійович Левінський ◽  
◽  
Валерій Михайлович Левінський ◽  
◽  
◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Fuel Consumption ◽  
Automatic Control System ◽  
Water Wave ◽  
Manual Operation ◽  
Automatic Control Systems ◽  
Wave Disturbances ◽  
Influence Of Water

opicality. Modern vessel’s course automatic control systems allow to reduce ship’s running time and fuel consumption during voyage compared to manual operation. Effectiveness of their implementation depends on the timely adjustment of the controller parameters following the changes in the vessel’s dynamics, which requires usage of adequate models and qualification of the maintenance stuff.

scholarly journals Pelatihan Peningkatan Kompetensi Bidang Sistem Kendali Menggunakan Modul Arduino Di SMK Pangeran Antasari Balikpapan

2020 ◽  
Vol 3 (2) ◽  
pp. 136
Author(s):  
Fathur Zaini Rachman ◽  
Suhaedi Suhaedi ◽  
Hadiyanto Hadiyanto ◽  
Ihsan Ihsan
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Systems Analysis ◽  
Vocational School ◽  
Teacher Competence ◽  
Automatic Control Systems ◽  
Teacher Competency ◽  
Automation Technology ◽  
Training Practice

The activity at the "Pangeran Antasari Balikpapan" Vocational School has several objectives: improving teacher competency by training and testing directly on Arduino-based practice modules that have multi-input and multi-output peripherals that have extensive functions for applications in automatic control systems. Analysis and discussion to partners there are 2 main problems, the problem of automation technology and teacher competence. The problem of automation technology is solved by training practice modules that are useful as learning media in the field of automatic control systems and can be implemented for various applications. The problem of teacher competence with technology updates is solved by the development of learning media so that the teacher is able to create and innovate in the control system. The method used in this activity is discussion, explanation, demonstration, practice, and observation.

scholarly journals Optimization of nonlinear pulse systems of automatic control with astatic objects

2020 ◽  
pp. 61-70
Author(s):  
O. Sinyavsky ◽  
◽  
V. Kisten ◽  
N. Solomko ◽  
◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Pulse Duration ◽  
Automatic Control System ◽  
Linear Element ◽  
Optimal Parameters ◽  
First Order ◽  
Automatic Control Systems ◽  
In Series

Currently, nonlinear pulse automatic control systems have become widespread, so there is a need to develop methods for their study. Pulse regulators are created on the basis of positional with the addition of pulse breakers. They can be represented as a non-linear element, a simple impulse element and a forming circle connected in series. The aim of the study was to determine the optimal parameters for setting up a relay-pulse controller for an astatic object with a delay. When determining the parameters of adjustment of the relay-pulse regulator for the quality indicator in the optimization of the automatic control system was taken as the total square deviation. Applying this criterion, the pulse duration of the regulator was determined. The time quantization interval is determined from the condition of ensuring the absolute stability of the automatic control system. Analytical dependences were obtained to determine the pulse duration and time quantization interval, which make it possible to determine the debugging parameters of the relay-pulse controller for a first-order astatic object with a delay. This ensures a minimum control error, and the control system is stable.

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