Research and Application of Pre-Bent Automatic Control Models of 100 Meters Rail

2011 ◽  
Vol 704-705 ◽  
pp. 569-576
Author(s):  
Xi Rong Bao ◽  
Yu Yan Liu ◽  
Ge Li ◽  
Lin Chen ◽  
Jian Guo Wang ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Residual Stress ◽  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Natural Science ◽  
Bending Deformation ◽  
Rail Head ◽  
Cooling Function ◽  
The Mathematical Model

Repeated bending occurs toward the direction of rail head and rail base during the cooling which can lead to significant bending deformation and residual stress after cooling, the longer the rail, the more obvious this phenomenon is. In addition to cooling function, a kind of cooling bed with a pre-bent process will be used in order to solve this problem on 100 meters rail. The synchronous movements on this cooling bed can be realized by the automatic control system after establishing the mathematical model of bending deformation after rolling. The rail is reversely bent toward the rail base before cooling according to the pre-bent control of the pre-bent curve and is straight after cooling which can realize the control of the residual stress after pre-bent and straightening. The straightening residual stress significantly reduced after the pre-bent. Fund: National Natural Science Foundation funded projects （50765004）

scholarly journals IMPLEMENTATION OF THE METHODS OF IDENTIFICATION OF STATIC CONTROL OBJECTS

2017 ◽  
pp. 72-78
Author(s):  
Sergey Pachkin ◽  
Sergey Pachkin ◽  
Roman Kotlyarov ◽  
Roman Kotlyarov
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Mathematical Description ◽  
Control Object ◽  
Parametric Identification ◽  
Identification Problem ◽  
Temperature Control System ◽  
The Mathematical Model

One of the main tasks solved in the development of automatic control systems is the identification of the control object, which consists in obtaining its mathematical description. The nature and type of the mathematical model is determined by the goals and tasks for which it will be used. In the present case, the aim of obtaining the model is the synthesis of an automatic control system. Proceeding from the requirements of control problems, the identification problem consists in determining the structure and parameters of the mathematical model that ensure the best similarity of the model and object responses to the same input action. The article considers the experimental method of obtaining a mathematical description of the control object based on the results of measuring its input and output parameters and then processing the obtained results. The control object is the EP10 emulator made by the Oven Company, which is a miniature furnace. The emulator is used in experimental research in the process of commissioning using thermostat controls, and also applicable for educational purposes as part of training and research stands. As a result of structural identification with subsequent adjustment of the coefficients with the help of parametric identification, a model of the control object in the form of a second order aperiodic link is obtained. Parameters and type of the mathematical model allowed to make calculations and determine the parameters of adjustment of the TRM251 PID-controller. The software implementation of the automatic control system in the MatLAB environment made it possible to evaluate transient processes in a closed system. Thus, the calculation and analysis of the automatic control system in the first approximation were made. The final result can be obtained at the stage of commissioning the automatic temperature control system in the EP10 emulator using adaptation algorithms.

scholarly journals MODELLING AND ANALYSIS OF CARBON DIOXIDE CHEMISORPTION PROCESS AS OBJECT OF CONTROL

2017 ◽  
Vol 60 (8) ◽  
pp. 74
Author(s):  
Alexander A. Samarskiy ◽  
Alexander N. Labutin ◽  
Tatiana V. Labutina
Keyword(s):  
Carbon Dioxide ◽  
Mathematical Model ◽  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
System Structure ◽  
Pseudo First Order Reaction ◽  
Ideal Mixing ◽  
Object Of Control ◽  
The Mathematical Model

In article problems of modeling of carbon dioxide chemisorption process and its analysis as object of control are solved. Also, the recommendations on synthesis of automatic control system structure are provided. Based on system approach the main stages and tasks are formulated for the analysis of process of carbon dioxide chemisorption by potash solution as object of control. The solution of objectives is given in the example of nozzle absorber pilot plant. The mathematical model of the object is developed, the research of its static and dynamic characteristics is conducted, variables of a state values are defined for given inputs. The mathematical model of the object is constructed on the basis of assumptions about the sectional structure of the absorber. Each section is presented as an ideal mixing cell for both phases. It is assumed that the chemisorption process proceeds in the diffusion-kinetic area through a pseudo-first order reaction. It is established that the object is not linear on most dynamic channels. The linearized object model in space of states is synthesized. Matrixes of a state and control are defined. The assessment of stability of steady state, observability and controllability of the object is carried out. It is proved that the object has property of stability of the free movement. It is controllable in the state of space and is observed when only carbon dioxide output concentrations measured. Recommendations on automatic control system structure for the object are offered.Forcitation:Samarskiy A.A., Labutin A.N., Labutina T.V. Modelling and analysis of carbon dioxide chemisorption process as object of control. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 8. P. 74-79.

scholarly journals SYNTHESIS OF THE MATHEMATICAL MODEL OF THE AUTOMATIC CONTROL SYSTEM OF THE UNMANNED AIRCRAFT COURSE

2019 ◽  
pp. 152-159
Author(s):  
I. V. Zimchuk ◽  
V. I. Ishchenko ◽  
T. M. Shapar
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Control System ◽  
Automatic Control ◽  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Automatic Control System ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
The Mathematical Model

Unmanned aerial vehicles are by far the most promising military and civilian systems. There is a tendency to increase the efforts of a number of leading countries in the development of unmanned aerial vehicles and their complexes. The mathematical model of any system reflects in one way or another its real properties, including the existing limitations. It has been found that one of the most favorable and efficient methods for constructing mathematical models of automatic control systems is to develop them using transfer functions. In order to solve this problem, the article deals with the composition of the control system of a drone. A mathematical model consisting of the joint design of the unmanned aerial vehicle and its automatic control system has been synthesized. The description of the proposed mathematical model of the system is based on the representation of a linear continuous system by the difference equations obtained using the Tustin relation. The mathematical model proposed in the article can be used for the study of typical aircraft whose course management system is built according to the considered structure. The practical significance of the obtained results is the possibility of applying the developed mathematical model to study the dynamics of the change of state and to set up the system of automatic control of the course of the unmanned aerial vehicle through computer simulation. Prospects for further research in this area are computer simulation of an unmanned aerial vehicle control system and estimation of the accuracy of the mathematical model developed.

Selection of Method for Underwater Robot Control

2010 ◽  
Vol 164 ◽  
pp. 149-154 ◽  
Author(s):  
Piotr Szymak
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Numerical Analysis ◽  
Automatic Control ◽  
Robot Control ◽  
Underwater Vehicle ◽  
Underwater Robot ◽  
Underwater Robots ◽  
The Mathematical Model ◽  
Selection Of

Automatic control of motion of underwater robots, particularly along desired trajectory, requires application of proper controllers taking into account dynamics of the underwater robot and features of the marine environment. In the paper the mathematical model of an underwater vehicle [2] and the architecture of designed control system [4] have been presented. Moreover, selected results of numerical analysis in the form of comparison of different course controllers have been provided.

scholarly journals Aircraft Automatic Control System Failure and Flight Safety

2016 ◽  
Vol 3 (1) ◽  
pp. 15-23
Author(s):  
Mareks Šlihta ◽  
Vladimirs Šestakovs ◽  
Ramachandran Karunanidhi
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Flight Safety ◽  
System Failure ◽  
Equipment Failure ◽  
Successful Completion ◽  
The Relationship

Abstract This article presents a mathematical model estimating the probability of successful completion of the aircraft’s flight in case of aviation equipment failure in flight. This paper shows the relationship between the aircraft’s automatic control system and flight safety. The calculations of probability are made for the successful completion of the flight on Boeing 737 aircraft when the automatic control system has failed.

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