Application Of Automatic Control System Research Articles

Practical application of automatic control systems for pollutant emissions in chemical-technological processes

Practical application of automatic control systems for pollutant emissions in chemical-technological processes

Novel analytical heat source model for cold rolling based on an energy method and unified yield criterion

Accurate calculation of the heat source in the roll gap during the cold rolling process is the basis for a well-designed coolant system, which is particularly important for reducing roll wear and improving the flatness quality of strip steel. Although many established numerical models have high precision when calculating the work roll temperature, complex modeling processes and large calculation times result in the inability to predict the work roll temperature quickly for the application of automatic control systems. Therefore, the authors developed a new analytical heat source model to calculate the axial temperature distribution of the work roll in the cold rolling process. First, according to the deformation characteristics of strip cold rolling, the deformation zone is divided into a plastic zone and two elastic zones, and the length of each deformation zone is calculated considering the effect of tension. Then, the friction heat generated in the elastic zone is calculated. Second, new exponential velocity and corresponding strain-rate fields satisfying kinematically admissible conditions are proposed to calculate the deformation heat and friction heat generated in the plastic zone. Finally, the work roll temperature prediction model is established by contemplating the heat source of the roll gap, emulsion heat transfer, air cooling, and contact heat transfer with the intermediate roll. By repeatedly optimizing the weighted coefficient d of intermediate principal shear stress on the yield criterion, the maximum error between the calculated results and the actual measured cold roll temperature data was reduced to 3.1%. The effects of the reduction ratio, rolling speed, and resistance to deformation on the deformation heat and friction heat are discussed, and the variation of temperature field of the work roll with time is analyzed quantitatively.

Design and Application of Automatic Control System for Fully Mechanized Mining Face in Coal Mine

In order to improve the automatic control effect of fully mechanized mining face in coal mine, this paper combines the literature research method to analyze the disadvantages of traditional research and combines the demand analysis to analyze the structure of the automatic control system of fully mechanized mining face in coal mine. Moreover, this paper uses an improved algorithm to improve the system performance, uses the analytical approximation method to calculate and eliminate the loading phase of the fourth-order input and output equal-length cavity filter and the fourth-order input and output unequal-length cavity filter, and obtain the correct coupling matrix. In addition, this paper uses the genetic algorithm to calculate and eliminate the loading phase of the sixth-order input-output equal-length cavity filter and the sixth-order input-output unequal-length cavity filter. In addition, after the system is constructed, the performance analysis of the system can be known through experimental research. The research results show that the automatic control system of fully mechanized mining face in coal mine proposed in this paper has a good intelligent control effect.

Reduce Differential Transform Method for Analytical Approximation of Fractional Delay Differential Equation

The study of an entirely new class of differential equations known as delay differential equations or difference differential equations has resulted from the development and application of automatic control systems (DDEs). Time delays are virtually always present in any system that uses feedback control. Because it takes a finite amount of time to sense information and then react to it, a time delay is required. This exploration was carried out for the solution of fractional delay differential equations by using the reduced differential transform method. The results are presented in a series of form that leads to an exact answer. The proposed technique is found to be accurate and convergent. MAPLE 17 is used to illustrate the results graphically.

Technical Transformation and Application of Automatic Control System for Ore Crushing in Concentrator

Technical Transformation and Application of Automatic Control System for Ore Crushing in Concentrator

НОРМЫ И МЕТОДЫ ОПРЕДЕЛЕНИЯ ЭЛЕКТРОМАГНИТНОЙ СОВМЕСТИМОСТИ СОВРЕМЕННЫХ СИСТЕМ АВТОМАТИЧЕСКОЙ ЛОКОМОТИВНОЙ СИГНАЛИЗАЦИИ И ЭЛЕКТРОПОДВИЖНОГО СОСТАВА С АСИНХРОННЫМ ТЯГОВЫМ ПРИВОДОМ НА МЕТРОПОЛИТЕНЕ

The article provides a brief overview of the development and application of automatic control systems for subway trains. Modern automatic locomotive signaling systems featuring automatic speed control with signal transmission based on double-phase-diff erence modulation are analyzed. The introduction of electric rolling stock with an asynchronous traction drive and advanced train traffi c automation and remote control systems at the St. Petersburg Metro initiates the drive to ensure their electromagnetic compatibility. For the subway train traffi c automation and remote control systems, there have been no acceptance criteria for electromagnetic interference that occur in their operating range when electric rolling stock with an asynchronous traction drive is put into operation. The article identifi es the main sources of conducted electromagnetic interference and the routes of their penetration into the receive path of automatic locomotive signaling devices with automatic speed control. A method is proposed for determining the limits of hazardous and interfering eff ects (immunity limits) for automatic train signaling systems with automatic speed regulation of the systems of the BARS automatic speed control unit with phase-diff erence modulation and the upgraded PA-M (ПА-М) train automation with phase-diff erence modulation for the St. Petersburg Metro lines. A method is given for the transition from the immunity limits of automatic locomotive signaling systems with automatic speed control to the emission limits of electric rolling stock at diff erent traction current unbalance factors. A technique for measuring traction current at high-potential points on electric rolling stock is considered. A technique for assessing the levels of conducted electromagnetic interference from electric rolling stock by calculating the eff ective value in a sliding window of a pre-fi ltered traction current signal of an electric rolling stock is presented.

Design the semi-automation shrimps tempura frying production line

Currently, Tempura shrimp consumption is very high in most Japanese restaurants all over the world. There are many companies that produce Tempura shrimp to provide for many restaurants as well as to sell in many supermarkets in many countries. In fact, the benefits of this product are enormous for the seafood industry in Vietnam as well as in other countries. However, most of the companies that produce the Tempura shrimps manually by workers. There are a lot of workers who fry shrimp manually to keep the company productive. The quality of this product also bases on the skill of the workers. And, to satisfy the condition of mass production, the enterprise also needs the very large area to set up the workplace for the workers. Secondly, this situation leads to the practical results that the quality of Tempura shrimp is not identical, unstable and the amount of waste is very high. Therefor, the requirement for the application of automatic control system in this tempura field can help the company to solve these difficult problems. This issue is the primary focus of this document. It is the situation of the Tempura fried shrimp companies which lead them to implement automated systems to replace unskilled workers. This paper presents the design of the whole semi automation single-side Tempura shrimp frying production line to propose some innovation about the shrimp tempura frying process. The entire Tempura semi automation production line consists of 3 main modules. Each module can operate as an independent machine. The workers just put the coated shrimp in the molds and then the frying process will perform the remaining steps automatically. The first module (Module 1) is the shaping module or the first time frying module. The powder solution also installed with this module. The second module (Module 2) is the finished frying module. Finally, the oil drainning module (Module 3) using the technique of the hot heating airflow system to drain the excess oil inside the Tempura shrimps.

DIRECTION OF INNOVATIVE DEVELOPMENT OF NAVIGATION SYSTEMS IN THE COMPOSITION OF AGRICULTURAL EQUIPMENT

Due to the current state of scientific and technological progress, farmers can not only join digital technologies but also make agriculture fully managed and predictable. The article describes the "exact" technologies that today have the greatest impact on the agricultural business. It is difficult to imagine the state of agriculture without satellite navigation, which opens wide opportunities for the use of cost-effective and environmentally friendly technologies. These include in-line fertilizer application, soil tillage, precision planting and spraying of plants without gaps and overlaps, and precise operation of combines. In the article the system of automatic synchronization during performance of work by machine-tractor units, functional features and possibilities of its application is considered. There is no doubt that the use of navigation systems is one of the effective conditions for the use of machine-tractor units. It is the quality of the preparation that determines the success in growing crops. In addition, things are very important. To obtain reliable information about the problem of using TG fittings for sequential seizures from valve actuators, it is also revealed that firms have created an automatic device, included in the working period of full-time employees, who remain searchable for the names contained in pesticides. Attention is paid to the control of machine and tractor units. A number of automated control systems and electronic devices have been developed for this purpose. Their application plays an important role in the technologies of modern agrarian production. The necessity of introducing satellite navigation systems on tractors and agricultural machines is substantiated. Examples of application of automatic control systems on different agricultural machines are given.

EXPERIMENTAL PERFORMANCE RESEARCH AUTOMATIC PROCESS CONTROL SYSTEM IN A PROCESS ON A LATHE

This article contains materials on experimental research of efficiency of the automatic system developed by us at turning [1]. The processing of a step part was carried out on 1K62 lathe with and without automatic system. Thus the corresponding results proving efficiency of application of automatic control system of machine operation modes were received: increase of accuracy of geometrical sizes, decrease of roughness of a surface of a detail. The developed automatic system on the basis of received results of the experiment can be recommended for application on other types of machine tools.

Practical Solutions for Specific Growth Rate Control Systems in Industrial Bioreactors

This contribution discusses the main challenges related to successful application of automatic control systems used to control specific growth rate in industrial biotechnological processes. It is emphasized that, after the implementation of basic automatic control systems, primary attention shall be paid to the specific growth rate control systems because this process variable critically affects the physiological state of microbial cultures and the formation of the desired product. Therefore, control of the specific growth rate enables improvement of the quality and reproducibility of the biotechnological processes. The main requirements have been formulated that shall be met to successfully implement the specific growth rate control systems in industrial bioreactors. The relatively easy-to-implement schemes of specific growth rate control systems have been reviewed and discussed. The recommendations for selection of particular control systems for specific biotechnological processes have been provided.

Possibilities of Energy Efficiency Experimental Research Using MLBE Building’s Automation and Control System

Due to the increasing requirements in the field of buildings’ energy saving, impossible to meet only due to the thermal insulation of the building envelope, it is necessary to pay attention to the energy efficiency of technical installations and application of automatic control systems. Computer simulations on the building structure or functioning of its individual installations in the context of limiting its energy consumption, performed by Design Builder – type computer programs, are a very useful tool. However, in the case of simulation studies on the impact of automatic control systems on energy efficiency, the results are often overly optimistic – they are overestimated in comparison to results achieved in actual environments. Therefore, the results obtained should be validated in an actual environment. This paper presents the Małopolska Laboratory of Energy Efficient Building (MLBE) of Cracow University of Technology, which provides an opportunity to perform experimental actual scale research of building automation systems to improve buildings energy efficiency and occupants’ comfort. This paper includes a detailed description of MLBE’s building automation and control system. Furthermore, this paper presents possibilities and an example methodology of energy efficiency’s experimental study using BACS system.

Application of Automatic Control System on Steam Boiler to Reduce Electric Power Consumption

This research focused on utilizing alternative energy sources in the nutmeg oil refining process. The purpose of this study is to obtain a more efficient energy source than fuel and gas energy sources in the steam boiler. The benefits of this research are reducing production costs, simplifying operations and reducing pollution in the distillation process. The method applied is to modify the steam boiler using an electrical energy source. Electric power consumption is based on the amount of temperature and pressure on the steam boiler. The desired temperature ranges from 100 ° C - 120 ° C, and the desired pressure is in the range of 1.0 - 2.0 bar. So that to maintain the temperature and pressure range is applied microcontroller-based electronic control. To improve the performance of the distillation system, the control works automatically. Testing on the steam boiler, by distilling as much as 20-25 kg of nutmeg in 16 hours. During this testing time, the electric power consumption decreased by 15%.

Application of automatic control system in high pressure water descaling system

Application of automatic control system in high pressure water descaling system

Diseño e instalación de un sistema de control automático de malla sombra, caso cultivo de fresa (Fragaria sp.)

A nivel nacional, cada vez es más frecuente la aplicación de sistemas electrónicos de control automático en los procesos de producción agrícola. El desarrollo y aplicación de los sistemas de control automático permiten la adap­tación de las técnicas de cultivo a las condiciones ambientales, para conse­guir un cultivo más rentable y racional en zonas pequeñas de una misma explotación agrícola. Este trabajo contempla el desarrollo y la evaluación de un sistema de control automático para controlar la apertura o el cierre de una malla sombra en función a la radiación incidente en el cultivo. Se desarrolló un algoritmo y programa que automatiza la colocación de la malla sombra, con ayuda de un controlador lógico programable (PLC Millenium III) para mayor facilidad de la implementación. Se aplicó el sistema desarrollado al cultivo de fresa (Fragaria sp.). Se realizaron las pruebas y la evaluación con tres camas de fresa: en campo abierto, malla fija y malla móvil controlada en función de la radiación. La malla sombra, se abre si la radiación es menor a 400 W/m2 o se cierra si la cantidad de radiación es mayor a 600 W/m2 al medirse con un sensor, además se puede abrir y cerrar manualmente para realizar la cosecha y el mantenimiento. Uno de los resultados obtenidos, es que la producción en la cama bajo la malla móvil es mayor en 12,88% que en la malla fija y en 37,42% que en el campo abierto.

Selected aspects of hydraulic issues in heating systems

Abstract Rational and efficient use of thermal energy in recent years has resulted in significant changes in the heating system as well as technological progress. In order to design a heating system properly and exploit it correctly, an in-depth understanding of the hydraulic issues is necessary. Application of automatic control system in various sectors of heating network has resulted in a more dynamic and efficient work of the whole system. For proper operation of a thermal system it is also necessary to compile a correct heat balance and a regulation graph that allows to determine the optimal mass and parameters of heat medium. The article discusses the problems of supplying heat process, types of thermal systems and selected problems of hydraulic issues that occur in the heating networks.

Системы управления электроприводами прямоточных волочильных станов: анализ достоинств и недостатков

The analysis of the control systems for straight-through drawing machine with different power supply circuits of the drive motors has been made. It is shown that the main task of the feasibility of the process of drawing – equality-second volume of metal passing per unit of time at each section of the drawing machine is solved either by means of mechanization or via an electric drive and automation tools. The matter has been settled through mechanization at sliding and magazine-type machines. In them, with installation of the simplest systems of unregulated electric drive, the problem is solved in the first case through wire slip on drawing capstans, in the second case – the use of special driver devices. However, such wire drawing machines have significant drawbacks: higher energy costs, low productivity. At straight-through drawing machines the process reliability question has been solved by an automated electric drive. Wire at such machines from the capstan is directed into a die and then to the next capstan without slipping on the capstan or additional bends and twists. In practice for drawing machine’s electric driving, systems with series, parallel and individual drive motor power supply are used. The analysis of schemes with a serial connection of motor armatures revealed possibility of providing self-drawing process, namely invariance countertension speed drawing. But we have found that the deviation countertension substantially influenced the change in resistance and wire deformation conditions in the portage , and due to the different mechanical inertia blocks — acceleration and deceleration of the machine. The errors in the regulation countertension reach unacceptable according to the technological requirements of units. In the case of circuits with parallel motor armature self-drawing process is absent and no specially organized every countertension management systems essentially depends on the motor voltage. Studies of various design options of electric control systems (indirect regulation, countertension sensors, pressure of metal on a die and tension) showed that the best performance can be achieved in the application of automatic control systems, acting as a compensation system abnormalities, leading to breakage of the wire. However, experimental studies have shown that the error in the regulation countertension in any system with parallel connection of the motor armature is also greater than the maximum allowed. Undoubtedly, higher quality indicators drawing process control is achieved with the use of electric drive systems with individual power motors. In such systems, a given drawing speed accuracy and the amount of force countertension provided with closed automated electric control systems. Errors in the regulation of technological origin does not exceed the maximum allowable values, while drawing speed is 5 times or more higher than the maximum achievable on machines with other power supply circuits of motors.

Application of Automatic Control System in Water Plant in China

Application of Automatic Control System in Water Plant in China

Key Technologies and Application of Automatic Control System for Wide Stainless Steel Hot Strip Rolling Line

Wide stainless steel hot strip line integrated with mechanical electric hydraulic equipments is a complicated large system. Automatic control system is very important for improving mill efficiency and products quality. The new equipments and technology are introduced. The characteristics of hot strip line and its requests for automation, the ideas of control system design, system structure and configuration are explained in detail. Multilevel system, 1000M high speed fabric Ethernet between levels, 640M high speed global data memory network between controllers, high speed Profibus_DP network between controller and equipments, hot machine backup strategy of L2,Tri-cyclic fabric Ethernet redundancy of L1 and other innovative design ideas,and L2 main mathematic models, L1 key control models are all applied in the system. The design ideas of this paper and integrated automatic control system has been applied on several stainless steel hot strip lines.

The Design and Application of Automatic Control System for Inorganic Membrane Filter

For the existing inorganic membrane filter, this paper set up an automatic control system using PLC and touching screen, unified regenerate counter blowing control, online discharging control, pneumatic conveying control, process monitoring display and alarm etc., to reach the remote and on-site control. Hardware composing and software function of control system has been built. Performance parameters, match with actual capacity, of dust removal system are set by application. The application indicates that: when the pressure drop set to 25000 pa, regeneration counter blowing program starts, counter blowing interval set to 15s, counter blowing time set to 0.15s, pulse cleaning pressure set to 6860000 pa, the whole system moves stably and reliably, and it has high efficiency of dust removal.

Open surveys: An information system for the improvement of international stability

Abstract It is appropriate to consider if the knowledge and understanding that has been gained in the development and application of automatic control systems might be brought to bear on the problems of war, peace and internatonal stability. For the improvement of stability in societal systems, better measurements and a better understanding of the variables of influence are greatly needed. An appropriate process model is presented as a guide to data gathering and the measurement of attitudes and beliefs that are factors in the determination of international stability. The use of open surveys, regularly and consistently repeated, is recommeded as an early warning system. To minimize current world costs in military arms and destruction, emphasis is recommended on the detection and measurement of those factors that are precursors to a more open and visible hostility than to the actual outbreak of aggression.