scholarly journals Sincronización de sistemas activos en procesos de clasificación de objetos por color

2020 ◽  
pp. 21-31
Author(s):  
Martín Eduardo Rodríguez-Franco ◽  
Adrian Martínez-Romero ◽  
Adolfo Ángel Nájera-Montoya ◽  
Yadira Fabiola López-Álvarez
Keyword(s):  
Control System ◽  
Control Systems ◽  
Active Element ◽  
Conveyor Belt ◽  
Process Control System ◽  
Prototype System ◽  
Graphical Interface ◽  
Discrete Events ◽  
Concurrent Control ◽  
Active Elements

This document proposes an application of the theory of control systems in discrete events, and its synthesis using GRAFCET specification, for the management of a prototype system for handling and classifying objects by color. The interaction and synchronization between a robot in angular configuration and a conveyor belt are exposed as active elements, in order to establish a sequence of tasks to be executed; which begins with the entry of an object to the process, to end with the positioning of the same in the respective deposit, once its color has been identified. The development of the prototype for testing, the definition and programming of the process control system based on the suggested methodology and the integration of the graphical interface that allows the user to view its status is shown. The results suggest that the application of formal methods, such as GRAFCET, promote the establishment of a functional, structured, scalable, distributed and concurrent control system, by allowing adequate decentralization of the tasks that each active element must execute and at the same time determine its timely action, no interference with each other.

Reducing the Impact of Source Information Uncertainty in Intelligent Automated Thermal Process Control Systems in Ensuring Reliable Operation of Power Equipment

Vestnik MEI ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 78-87
Author(s):  
Edik K. Arakelyan ◽  
◽  
Ivan A. Shcherbatov ◽  
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Process Control System ◽  
Power Equipment ◽  
Source Information ◽  
Equipment Operation ◽  
Process Control Systems ◽  
Automated Process ◽  
The Impact

The uncertainty of the source information is used to solve key tasks in an intelligent automated thermal process control system affects the calculation of control actions, the implementation of equipment optimal operating modes and, as a result, leads to degraded reliability. As a rule, this type of information can be qualitative (the use of expert knowledge) or quantitative in nature. In this regard, it is extremely important to reduce the impact of uncertainty. The aim of the study is to identify the types and origins of uncertainty in the source information used by an intelligent automated process control system and to develop approaches to reduce its impact on the reliability of power equipment operation. The approaches used to ensure the specified indicators of reliability, efficiency and environmental friendliness in modern intelligent automated process control systems are based on predictive strategies, according to which the technical condition of equipment and specific degradation processes are predicted. This means that various types of uncertainty can have a significant negative impact. To reduce the influence of uncertainty of the initial information that affects the reliability of power equipment operation, the use of artificial neural networks is proposed. Their application opens the possibility to predict the occurrence of equipment defects and failures based on retrospective data for specified forecast time intervals. A method for reducing the impact of anomalies contained in the source information used in an intelligent process control system for energy facilities is demonstrated. Data omissions and outliers are investigated, the elimination of which reduces the impact of uncertainty and improves the quality of solving key problems in intelligent automated process control systems. Experimental studies were carried out that made it possible to identify the mathematical methods for removing omissions and anomalies in the source information in the best way. Methodological aspects of eliminating various types of uncertainty that exist in managing of power facilities by means of intelligent automated process control systems at the key stages of the power equipment life cycle are described.

INTERVAL LOGIC FOR PROCESS CONTROL SYSTEM SPECIFICATION

1991 ◽  
Vol 01 (03) ◽  
pp. 303-326
Author(s):  
PETER P.K. CHIU ◽  
Y.S. CHEUNG
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Process Control System ◽  
Time Interval ◽  
System Specification ◽  
Time Intervals ◽  
Process Control Systems ◽  
Sequential Processes ◽  
Interval Logic

A new methodology for the specification of process control systems involving time interval information and verification of their design is proposed. The specification is based on interval logic and a time-interval operator is defined. By means of this operator, time interval information is incorporated in the specification. Thus properties that involve time intervals can be verified. Moreover, combinational and sequential processes can be specified. An application example for a process control system is demonstrated.

scholarly journals Examination of a repetitive process control system

2019 ◽  
Vol 287 ◽  
pp. 08002
Author(s):  
Nina G. Nikolova
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Process Control System ◽  
Robust Performance ◽  
Repetitive Process ◽  
Process Control Systems ◽  
Improved Performance ◽  
Robust Process

In the present work, the application of repetitive filters in the robust process control systems is examined. The functionality of the proposed system and the improved performance, robust performance and filtering properties has been proven.

scholarly journals TO THE QUESTION OF BUILDING PRECEDENTIAL CONTROL SYSTEMS BASED ON SUPPORT-DISTURBED MOVEMENT

2019 ◽  
pp. 17-24
Author(s):  
Mikhail Yurievich Gudkov ◽  
Alexey Sergeyevich Dobrynin ◽  
Alexander Sergeyevich Koynov
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Integrated Management ◽  
Control Object ◽  
Process Control System ◽  
Automated Control ◽  
Quality Of Control ◽  
Communication Devices ◽  
Technological Object

The article considers the problem of the modern automated control systems which operate in the difficult conditions of constantly changing multi-factorial effects of the environment. Such systems should be considered as multi-mode, non-stationary human-technical systems, since they realize the integrated management of a complex technological object. As a rule, these systems are influenced by both environmental factors and complex man-machine mechanisms and technical means (such as communication devices with an object, programmable controllers - PLC), which constitute the control infrastructure, which ultimately leads to additional complexity and errors, additional management problems and reduced overall management quality. The approach to building an automated process control system is claimed to be based on using reference libraries and control algorithms (precedents), which are selected depending on the changing environmental conditions and the assets used, as well as on the logistics support. Despite the use of modern software and hardware in many systems, such as PLC, very often the quality of control leaves much to be desired. This is due to the fact that the control object changes over time for various reasons, and the control algorithm remains unchanged, which leads to a decrease in the efficiency of functioning of such systems. The generalized structure of the precedent process control system is described, which highlights the approach to the control of a technological object within the framework of the well-known concept of support-disturbed movement, which is suitable for building robust control systems for technological objects with substantial nonstationarity.

scholarly journals A precedent approach to incident management in automated process control systems

2020 ◽  
pp. 45-52
Author(s):  
Aleksey Sergeevich Dobrynin ◽  
Mikhail Yur'evich Gudkov ◽  
Roman Sergeevich Koynov
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Process Control System ◽  
Incident Management ◽  
Level Control ◽  
Process Control Systems ◽  
Automation Systems ◽  
Software And Hardware ◽  
Automated Process

The continuous development of automated control systems for industrial facilities leads to the emergence of more advanced and complex control algorithms. A natural consequence of the development of control systems (CS) is the use of more complex technical means: sensors, controllers, SCADA and MES systems. Ultimately, the saturation of systems with additional software and hardware leads to a decrease in manageability in general, since software needs to be updated, equipment often fails, needs replacement, etc. Thus, approaches aimed at creating separate, autonomously functioning subsystems are becoming a thing of the past. An integrated, multi-level joint management of the entire infrastructure of the process control system is needed, from the technological facility to the technical infrastructure, which is closely tied to the facility. The article discusses the issues of constructing top-level control subsystems for the process control system, when it is necessary to control directly the software and hardware as part of the process control system. As research methods, simulation and computer modeling was used, which made it possible to evaluate the effectiveness of the proposed approaches and management methods. Also, the research results were verified through the pilot implementation of an automated incident management system based on the proposed approaches in the process of managing a complex technologically object. The novelty of the research lies in the proposed approach to incident management in automated process control systems, which makes it possible to improve the quality of management, reduce management costs, and predict (in some cases) the occurrence of new incidents and take measures to prevent them. Studies have shown the feasibility of using the proposed approach to control complex non-stationary automation systems.

scholarly journals Sincronización de sistemas activos en procesos de manejo de materiales

2019 ◽  
pp. 6-12
Author(s):  
Martín Eduardo Rodríguez-Franco ◽  
Ricardo Jara-Ruiz ◽  
Yadira Fabiola López-Álvarez ◽  
Malinali Xochiquetzal Martínez-Martínez
Keyword(s):  
Material Handling ◽  
Conveyor Belt ◽  
Material Handling System ◽  
Monitoring And Control ◽  
Discrete Events ◽  
Handling System ◽  
Active Elements ◽  
Control Interface ◽  
Productive Process ◽  
And Control

The present work proposes an application of automata’s language and control systems in discrete events theory in a prototype of material handling system to ensure the continuity in the sequence that a transferred piece will have to execute between two points of a productive process. Also guaranteeing the synchronization of its active elements, in this case, a robot in angular configuration and a conveyor belt, for the fulfillment of its specific task without errors. We describe the development of the prototype for testing, the programming of the digital process controllers based on the theoretical methodology suggested, and finally, the integration of a graphical monitoring and control interface that allows the visualization of the system state to the user. The results suggest the adequate performance of the developed algorithms, the graphical interface and, in general, of the active elements that make up the material handling system.

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