scholarly journals Equations of periodic modes, which take into account features of the dynamics of their course in nonlinear automatic systems with computers in control system

2021 ◽  
pp. 12-20
Author(s):  
О.В. Войтко ◽  
В.Г. Солонніков ◽  
О.В. Полякова ◽  
А.М. Ткачов
Keyword(s):  
Control System ◽  
Nonlinear Systems ◽  
Structural Diagram ◽  
Harmonic Linearization ◽  
Discrete Approach ◽  
Control Computer ◽  
Linearization Coefficients ◽  
Automatic Systems

In the article, based on the application of a continuous-discrete approach to the description of periodic modes that are possible in automatic systems with a control computer, equations are obtained that take into account the peculiarities of the dynamics of their flow in nonlinear systems of the noted class and provide an increase in the accuracy of calculating their parameters. This is achieved by taking into account the specifics of the structural diagram of the system under study by replacing the NOT system with harmonic linearization coefficients, which have correspondingly different formula expressions. The use of the proposed equations will make it possible to use the investigated modes more efficiently during the functioning of the system, or vice versa, it is guaranteed to get rid of them.

The Overall Design of the Comber Drive Control System Drive control system design

2020 ◽  
Vol 13 ◽  
Author(s):  
Xiaobei Wang
Keyword(s):  
Control System ◽  
Textile Industry ◽  
Production Efficiency ◽  
Vital Role ◽  
Cotton Textile ◽  
Drive Control ◽  
Operation Process ◽  
Control Computer ◽  
Industrial Control Computer ◽  
Made In China

Objective: The cotton textile industry, as a competitive industry in China's international competition, is confronting new opportunities and challenges brought by the growing process of mechatronics. To further improve the traditional drive control of combing machines made in China and the automatic level of machines as a whole, some of our cotton textile enterprises have undertaken necessary technical transformations on the combing machines so as to raise the operational efficiency and production technology of domestic textile equipments. Methods: This paper focuses on the basic status and dynamic characteristics of the drive part of the domestic new comber, and analyzes the operation process of the comber and the prominent problems from the production practice. Results: The technically improved drive control system uses an industrial control computer (IPC) as the core of the system, which effectively improves the overall working efficiency of the comber, and improves the production accuracy and production efficiency. Conclusion: The combers that are textile machinery equipments with comprehensive application of machines, electricity, gases and instruments, play a vital role in enhancing product quality and production efficiency. Highly intelligent and integrated process control, real-time monitoring and accurate data acquisition and data analysis have become the mainstreams in the development of auto-control. Therefore, the commitment of high technology to transform the traditional production mode has also been an important research.

Experimental Research on Pulsating Two-Phase Flow Pressure Drop Characteristics in Horizontal Rectangular Channel

2014 ◽  
Author(s):  
Chong Zou ◽  
Puzhen Gao ◽  
Wei Pan ◽  
Zheng Yang ◽  
Xianbing Chen
Keyword(s):  
Control System ◽  
Rectangular Channel ◽  
Hysteresis Effect ◽  
Regulation System ◽  
Single Chip ◽  
Industrial Control ◽  
Correctional Programs ◽  
Control Computer ◽  
Industrial Control Computer ◽  
And Control

We preliminarily designed a power tracking and control system using single-chip computers and industrial control computer in the electric heating simulated power loop. The system is an innovational design based on the proven simulated nuclear power loop, with increased techniques of step-less power regulation system and modeling nuclear feedback effect correctional programs. We promoted both hardware and software designs of this power tracking and control system in this paper. It used single-chip computers as the core control chips and an industrial control computer as the additional correctional program and record carrier. The process and implementation of the control software are presented, which is designed as a fuzzy theoretical nonlinear system. In order to ensure the subsequent updates, the access interface of the system is open for following correctional programs, including the correctional program of void fraction effect, temperature effect, hysteresis effect and heat power distribution effect. Taken hysteresis effect correctional program as an example, we use an offset tic-tac clock replacing the inherent tic-tac clock in different devices of the system in order to reduce the hysteresis effect of measuring and corresponding errors. We also put out a preliminary analysis of the accurate synchronization for the system at the end of the paper.

Application of Siemens S7-300 PLC in the Thermal Power Plant Flue Gas Desulfurization Control System

2014 ◽  
Vol 511-512 ◽  
pp. 1123-1127
Author(s):  
Mei Long Ju ◽  
Xiu Qin Zhai ◽  
Qing Zhang
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Flue Gas ◽  
Thermal Power ◽  
Flue Gas Desulfurization ◽  
Industrial Control ◽  
Economic Operation ◽  
Control Computer ◽  
Industrial Control Computer

According to the characteristics of Wet Flue Gas Desulphurization (FGD), this paper brings forward the automatic control requirements and the control methods. The automatic control system is composed of a Programmable Logic Controller (PLC) and an industrial control computer (PC). The automatic control system can monitor the operating parameters of FGD system automatically and conduct automatic control and adjustment to FGD system. The PLC is responsible for the data collection and automatic control, while the PC is responsible for the surveillance of FGD system operation and the data processing through mutual communications between PC and PLC, which realizes the communication between human and machine and ensures the safe, stable and economic operation of the FGD system.

Research and Design of the PLC-Based Control System for Thermal Power Plant Flue Gas Desulfurization

2013 ◽  
Vol 805-806 ◽  
pp. 991-995
Author(s):  
Huo Jun Liu
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Flue Gas ◽  
Thermal Power ◽  
Flue Gas Desulfurization ◽  
Industrial Control ◽  
Control Computer ◽  
Industrial Control Computer ◽  
Research And Design

According to the characteristics of Wet Flue Gas Desulphurization (FGD), this paper brings forward the automatic control requirements and the control methods. The automatic control system is composed of a Programmable Logic Controller (PLC) and an industrial control computer (PC). The automatic control system can monitor the operating parameters of FGD system automatically and conduct automatic control and adjustment to FGD system. The PLC is responsible for the data collection and automatic control, while the PC is responsible for the surveillance of FGD system operation and the data processing through mutual communications between PC and PLC, which realizes the communication between human and machine and ensures the safe, stable and economic operation of the FGD system.

scholarly journals Test and Commissioning of the AST3-1 Control System

2012 ◽  
Vol 8 (S288) ◽  
pp. 329-330 ◽  
Author(s):  
Xiaoyan Li ◽  
Daxing Wang
Keyword(s):  
Control System ◽  
Dynamic Properties ◽  
Circuit Board ◽  
Night Time ◽  
Antarctic Plateau ◽  
Control Cabinet ◽  
Movement Performance ◽  
Control Computer ◽  
Telescope Optics ◽  
The Antarctic

AbstractThe first of three Antarctic Survey Telescopes (AST3-1), a 50/68cm Schmidt-like equatorial-mount telescope, is the first trackable Chinese telescope operating on the Antarctic plateau. It was installed at Dome A (80°22′, 77°21′E, 4,093m), the highest place on the Antarctic plateau, in 2012. The telescope is unmanned during night-time operations through the Austral winter. The telescope optics and mechanics, as well as the motors and position sensors, are exposed to a harsh environment. The mechanics is enclosed with a foldable tent-like dome to prevent snow, diamond dust and ice. While the control cabinet containing drive boxes, circuit board boxes, power converters and the Telescope Control Computer (TCC) is located inside the warm instrumental module. In about 15 weeks remote testing and commissioning, from January 24 when the expedition team left there to May 8, when the communication failed, we obtained images with the best FWHM of less than 2″. We also recorded the telescope movement performance and fine-tuned the dynamic properties of the telescope control system. Some experiences and lessons will be disscussed in this paper.

The True Linearization Coefficients for Nonlinear Systems Under Parametric White Noise Excitations

2004 ◽  
Vol 74 (1) ◽  
pp. 161-163 ◽  
Author(s):  
Giovanni Falsone
Keyword(s):  
Parameter Estimation ◽  
Nonlinear Systems ◽  
Nonlinear Response ◽  
Original System ◽  
Linearization Method ◽  
Maximum Likelihood Estimates ◽  
Stationary Case ◽  
Stochastic Linearization ◽  
Linearization Coefficients ◽  
White Noises

In this paper some properties of the stochastic linearization method applied to nonlinear systems excited by parametric Gaussian white noises are discussed. In particular, it is shown that the linearized quantities, obtained by the author in another paper by linearizing the coefficients of the Ito differential rule related to the original system, show the same properties found by Kozin with reference to nonlinear system excited by external white noises. The first property is that these coefficients are the true linearized quantities, in the sense that their exact values are able to give the first two statistical moments of the true response. The second property is that, in the stationary case and in the field of the parameter estimation theory, they represent the maximum likelihood estimates of the linear model quantities fitting the original nonlinear response.

Design of a Control System for a Turret Based Test Handler

2012 ◽  
Vol 201-202 ◽  
pp. 131-134
Author(s):  
Zhi Sheng Zhang ◽  
Fan He
Keyword(s):  
Control System ◽  
Object Oriented Programming ◽  
General Control ◽  
Industrial Control ◽  
Testing Procedures ◽  
Control Computer ◽  
General Kind ◽  
Industrial Control Computer ◽  
Special Control

Final testing procedures are performed to assure the quality of manufactured parts before their shipping to customers. Turret based test handler is a general kind of IC Test Handler for final testing. This paper discusses how to develop a general control system for a test handler of turret style in which every workstation moves up and down separately based on an industrial control computer. The combination of object-oriented programming and the cycling scanning working mode is the key of the whole system. To achieve ideal performance, special control flags are designed as an efficient way for making all the workstations work as setting orders stably. The method to developing the control system in this paper can be also applied to similar systems, which would greatly reduce development cycles. A turret based test handler with this control system has passed the test of a semiconductor factory and operates well in actual production.

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