Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2022-76-9-428-432
The method of extreme filtering (EF) is considered, through the use of which signals are decomposed into sign-alternating components. The basis of the method under consideration is signal decomposition based on the removal of known components locally determined by their extreme. The methods of digital signal processing are considered and the results of their application to real data — trends obtained from the paper production scanner are shown. The advantages and disadvantages of the extremefiltration method are analyzed, and the possibility of its use in solving technical problems is shown. The extremefiltering method contains a simple mathematical base that does not require the calculation of transcendental functions, which guarantees higher performance than other methods with comparable results. Keywords empirical mode decomposition (EMD), extreme filtering (EF), singular value decomposition (SSA), spectral analysis, expresses signal analysis, alternating component, informative component
{"title":"The study of modern methods for extracting and evaluating the informative components of the signal","authors":"","doi":"10.36652/0869-4931-2022-76-9-428-432","DOIUrl":"https://doi.org/10.36652/0869-4931-2022-76-9-428-432","url":null,"abstract":"The method of extreme filtering (EF) is considered, through the use of which signals are decomposed into sign-alternating components. The basis of the method under consideration is signal decomposition based on the removal of known components locally determined by their extreme. The methods of digital signal processing are considered and the results of their application to real data — trends obtained from the paper production scanner are shown. The advantages and disadvantages of the extremefiltration method are analyzed, and the possibility of its use in solving technical problems is shown. The extremefiltering method contains a simple mathematical base that does not require the calculation of transcendental functions, which guarantees higher performance than other methods with comparable results.\u0000\u0000Keywords\u0000empirical mode decomposition (EMD), extreme filtering (EF), singular value decomposition (SSA), spectral analysis, expresses signal analysis, alternating component, informative component","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133671267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2020-74-5-213-219
An iterative criterion for the asymptotic steadiness of a linear descriptor system is considered. The criterion is based on an iterative algorithm for computing a generalized matrix sign-function. As an example, the problem of analyzing the asymptotic steadiness of a large descriptor system is given. Keywords linear descriptor system; steadiness criterion; matrix sign-function; search algorithm
{"title":"Iterative criterion of the descriptor system asymptotic steadiness","authors":"","doi":"10.36652/0869-4931-2020-74-5-213-219","DOIUrl":"https://doi.org/10.36652/0869-4931-2020-74-5-213-219","url":null,"abstract":"An iterative criterion for the asymptotic steadiness of a linear descriptor system is considered. The criterion is based on an iterative algorithm for computing a generalized matrix sign-function. As an example, the problem of analyzing the asymptotic steadiness of a large descriptor system is given.\u0000\u0000Keywords\u0000linear descriptor system; steadiness criterion; matrix sign-function; search algorithm","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132199196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2023-77-4-181-187
The researches results of possible ways for storing data in applications under the Android OS and a review of a number of scientific papers on this topic are presented. The absence of mathematical and technical description of data storage technology for such applications is revealed. The analysis and comparison of the solutions spectrum in this area are carried out. A typical approach for interacting with various databases is formulated. The reasons for using Room DAO, on the basis of which the necessary descriptions of operations with data are selected, are considered; an algorithm for processing data is proposed, and features of encapsulation when working with data are noted. Methods and algorithms for interaction with the Room Database are proposed. The general requirements for data storage based on Android, which are necessary to create a workable application, are formed. These technologies may be required in the mobile application market. Keywords Room DAO, Room Database, OC Android, internal storage, external storage, migrations
{"title":"Analysis of storage methods and visual data models at developing applications for the OS Android","authors":"","doi":"10.36652/0869-4931-2023-77-4-181-187","DOIUrl":"https://doi.org/10.36652/0869-4931-2023-77-4-181-187","url":null,"abstract":"The researches results of possible ways for storing data in applications under the Android OS and a review of a number of scientific papers on this topic are presented. The absence of mathematical and technical description of data storage technology for such applications is revealed. The analysis and comparison of the solutions spectrum in this area are carried out. A typical approach for interacting with various databases is formulated. The reasons for using Room DAO, on the basis of which the necessary descriptions of operations with data are selected, are considered; an algorithm for processing data is proposed, and features of encapsulation when working with data are noted. Methods and algorithms for interaction with the Room Database are proposed. The general requirements for data storage based on Android, which are necessary to create a workable application, are formed. These technologies may be required in the mobile application market.\u0000\u0000Keywords\u0000Room DAO, Room Database, OC Android, internal storage, external storage, migrations","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132789904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2023-77-1-12-19
A method for controlling a wind power plant based on the use of the optimization model that takes account of the drive vibration loading under different operating modes of the power unit is validated. The transfer functions of the rotor systems dynamic links are proposed, taking account of the influence of wind speed and electrical load, the block diagram of the control system and the transient process graph of the angular velocity regulating of the installation generator rotor. To ensure the reliability of the output control parameters and disturbing influences estimation, the determining method substantiation of the dynamic links correlation coefficients for the wind power plant rotor system is performed. These coefficients are necessary to develop models of the system dynamic behavior used in the modification of the wind power plant automated control in order to reduce the vibrations of all rotor systems elements under different operating modes of the power unit that will improve the reliability of modern wind turbines. The correlation function parameters to determine the correlation dependences for the measured values of wind speed and electrical load are found. Formulas are derived for determining the spectral density of input and output random processes at changing wind speed and electrical load, as well as the mutual spectral density of input and output random processes for dynamic links of rotor systems (rotary blades, rotor, generator, gearbox) based on the block diagram of the entire process in order to determine the correlation degree of transfer functions. The analysis of the input and output signals of the transfer functions with respect to their coherence is carried out from a correlation coefficients calculation of the rotor systems dynamic links. This makes it possible to describe the transfer function within the framework of the vibration fields analysis for the unit as a whole. Keywords wind power plant, control, rotor system, vibration, correlation coefficient
{"title":"Methods for improving the efficiency of a wind power plant and reliable estimation of output control parameters and disturbances","authors":"","doi":"10.36652/0869-4931-2023-77-1-12-19","DOIUrl":"https://doi.org/10.36652/0869-4931-2023-77-1-12-19","url":null,"abstract":"A method for controlling a wind power plant based on the use of the optimization model that takes account of the drive vibration loading under different operating modes of the power unit is validated. The transfer functions of the rotor systems dynamic links are proposed, taking account of the influence of wind speed and electrical load, the block diagram of the control system and the transient process graph of the angular velocity regulating of the installation generator rotor. To ensure the reliability of the output control parameters and disturbing influences estimation, the determining method substantiation of the dynamic links correlation coefficients for the wind power plant rotor system is performed. These coefficients are necessary to develop models of the system dynamic behavior used in the modification of the wind power plant automated control in order to reduce the vibrations of all rotor systems elements under different operating modes of the power unit that will improve the reliability of modern wind turbines. The correlation function parameters to determine the correlation dependences for the measured values of wind speed and electrical load are found. Formulas are derived for determining the spectral density of input and output random processes at changing wind speed and electrical load, as well as the mutual spectral density of input and output random processes for dynamic links of rotor systems (rotary blades, rotor, generator, gearbox) based on the block diagram of the entire process in order to determine the correlation degree of transfer functions. The analysis of the input and output signals of the transfer functions with respect to their coherence is carried out from a correlation coefficients calculation of the rotor systems dynamic links. This makes it possible to describe the transfer function within the framework of the vibration fields analysis for the unit as a whole.\u0000\u0000Keywords\u0000wind power plant, control, rotor system, vibration, correlation coefficient","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134129467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2023-77-5-213-215
The generator device of the reverse air movement for artificial ventilation of the lungs is considered. The automatic operation of the generator is ensured by the correct choice of parameters that allow realizing the effect of the air flow reverse movement at unchanged operating mode of the impeller. The change in the air flow direction occurs automatically at the required moments of reaching the limit pressure. Keywords air flow generator, reverse movement of air flow, artificial ventilation of the lungs, automatic operation
{"title":"The generator parameters of reverse air movement in the apparatus for artificial ventilation of the lungs","authors":"","doi":"10.36652/0869-4931-2023-77-5-213-215","DOIUrl":"https://doi.org/10.36652/0869-4931-2023-77-5-213-215","url":null,"abstract":"The generator device of the reverse air movement for artificial ventilation of the lungs is considered. The automatic operation of the generator is ensured by the correct choice of parameters that allow realizing the effect of the air flow reverse movement at unchanged operating mode of the impeller. The change in the air flow direction occurs automatically at the required moments of reaching the limit pressure.\u0000\u0000Keywords\u0000air flow generator, reverse movement of air flow, artificial ventilation of the lungs, automatic operation","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130574948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2022-76-8-379-384
The design of the speed and vibration acceleration sensor of the tape drive mechanism (DSVAS) for the parameters control, in particular, the vibration and speed of the tape drive mechanism from ferromagnetic and electrically conductive bodies using the Hall sensor as the main sensitive element is considered. DSVAS has an increased linearity of the metrological characteristics and sensitivity, is easy to operate and, with further transformation, can be used as a non-destructive testing flaw detector. A mathematical model with conclusions based on the results obtained is developed. The sensor can be put to use in the field of instrumentation, mechanical engineering, energy, diagnostics, etc. Keywords metrology, technology, information systems, linearity, magnetic Reynolds number, mathematical model
{"title":"Tape drive speed and vibration acceleration sensor","authors":"","doi":"10.36652/0869-4931-2022-76-8-379-384","DOIUrl":"https://doi.org/10.36652/0869-4931-2022-76-8-379-384","url":null,"abstract":"The design of the speed and vibration acceleration sensor of the tape drive mechanism (DSVAS) for the parameters control, in particular, the vibration and speed of the tape drive mechanism from ferromagnetic and electrically conductive bodies using the Hall sensor as the main sensitive element is considered. DSVAS has an increased linearity of the metrological characteristics and sensitivity, is easy to operate and, with further transformation, can be used as a non-destructive testing flaw detector. A mathematical model with conclusions based on the results obtained is developed. The sensor can be put to use in the field of instrumentation, mechanical engineering, energy, diagnostics, etc.\u0000\u0000Keywords\u0000metrology, technology, information systems, linearity, magnetic Reynolds number, mathematical model","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129381042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2022-76-7-303-307
A missile guidance algorithm based on a correlation of satellite and optical images is proposed. Estimation of the rocket position parameters by images correlation during landing is carried out on the basis of the use of three-dimensional spatial information. Information from the continuous image of each frame is decomposed into spatial information of the rocket relative motion during landing by processing the motion parameters of individual pixel points and the entire image. A correspondence between the image of the rocket landing point and the reference image from the satellite is achieved, and then information about the orientation of the rocket flight is displayed. Keywords missile guidance, optical image, image alignment, positioning, missile landing
{"title":"Missile guidance to landing sites based on image correlation","authors":"","doi":"10.36652/0869-4931-2022-76-7-303-307","DOIUrl":"https://doi.org/10.36652/0869-4931-2022-76-7-303-307","url":null,"abstract":"A missile guidance algorithm based on a correlation of satellite and optical images is proposed. Estimation of the rocket position parameters by images correlation during landing is carried out on the basis of the use of three-dimensional spatial information. Information from the continuous image of each frame is decomposed into spatial information of the rocket relative motion during landing by processing the motion parameters of individual pixel points and the entire image. A correspondence between the image of the rocket landing point and the reference image from the satellite is achieved, and then information about the orientation of the rocket flight is displayed.\u0000\u0000Keywords\u0000missile guidance, optical image, image alignment, positioning, missile landing","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122161226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2022-76-3-114-119
This article is devoted to the development of an approach to the volumes redistribution of production and shipments for the purpose of improving the objective functions value for a medium-term production plan built by using the sliding window method. Disadvantage of sliding window method is marked, which consists in excluding the options for long-term accumulation of production from consideration, and proposes an approach to solving this problem, which made it possible to significantly reduce the proportion of contractual obligations not planned for fulfillment. Keywords production planning; volumetric scheduling; sliding windows method; lexicographic optimization; petrochemical production; heuristic algorithm
{"title":"Development of an approach to mediumterm volumetric scheduling of production based on the sliding windows method","authors":"","doi":"10.36652/0869-4931-2022-76-3-114-119","DOIUrl":"https://doi.org/10.36652/0869-4931-2022-76-3-114-119","url":null,"abstract":"This article is devoted to the development of an approach to the volumes redistribution of production and shipments for the purpose of improving the objective functions value for a medium-term production plan built by using the sliding window method. Disadvantage of sliding window method is marked, which consists in excluding the options for long-term accumulation of production from consideration, and proposes an approach to solving this problem, which made it possible to significantly reduce the proportion of contractual obligations not planned for fulfillment.\u0000\u0000Keywords\u0000production planning; volumetric scheduling; sliding windows method; lexicographic optimization; petrochemical production; heuristic algorithm","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123601776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2022-76-10-435-443
A technology for the production of ICE pistons from aluminum alloys with a silicon content of 18 % is proposed. A method for pressing a crystallizing metal by pressure on a horizontal hydraulic press in order to obtain piston blanks for subsequent isothermal forging is developed. The pressing process is controlled by a computer control system embodied through the use of the modern industrial logic controllers and software. An interface for program control is developed. It indicated that the use of modern process control systems makes it possible to control the formation of the final product properties in real time. Keywords automation, computer control system, internal combustion engine pistons, isothermal forging, crystallization, pressure, mechanical properties of metal products
{"title":"Production process automation of internal combustion engine (ICE) pistons from hypereutectic silumins by injection molding with crystallization under pressure, followed by isothermal forging","authors":"","doi":"10.36652/0869-4931-2022-76-10-435-443","DOIUrl":"https://doi.org/10.36652/0869-4931-2022-76-10-435-443","url":null,"abstract":"A technology for the production of ICE pistons from aluminum alloys with a silicon content of 18 % is proposed. A method for pressing a crystallizing metal by pressure on a horizontal hydraulic press in order to obtain piston blanks for subsequent isothermal forging is developed. The pressing process is controlled by a computer control system embodied through the use of the modern industrial logic controllers and software. An interface for program control is developed. It indicated that the use of modern process control systems makes it possible to control the formation of the final product properties in real time.\u0000\u0000Keywords\u0000automation, computer control system, internal combustion engine pistons, isothermal forging, crystallization, pressure, mechanical properties of metal products","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123610521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36652/0869-4931-2020-74-6-264-268
The lack of modern methods for ensuring the stability of Kalman filtering under the priori uncertainty condition of the dispersion matrix measurement interference is the absence of strict criteria for choosing adaptation coefficients when calculating the posterior covariance matrix or the inability to adaptively evaluate in real time from the minimum covariance of the update sequence due to the need for its preliminary calculation. The article is devoted to the development of a new approach to adapting the Kalman filter, using the ability to obtain accurate measurements for a wide class of objects that irregularly enter their monitoring system (reference point, reference points, radio frequency identifiers, etc.). It is shown that for the distinguished case, the problem of adaptive estimation of the dispersion noise matrix of a linear meter in the Kalman filter can be solved analytically by using matrix methods of linear algebra. A numerical example illustrating the effectiveness of the procedure for estimating the state vector of a moving object based on the proposed algorithm in comparison with the traditional approach is presented. The simplicity and accuracy of the proposed algorithm provide the possibility of its effective application for the widest class of information-measuring systems. Keywords adaptive estimation; dispersion matrix of measurement noise; Kalman filter; non-periodic accurate observations
{"title":"Adaptive estimation of the dispersion noise matrix at linear measurements based on non-periodic accurate observations","authors":"","doi":"10.36652/0869-4931-2020-74-6-264-268","DOIUrl":"https://doi.org/10.36652/0869-4931-2020-74-6-264-268","url":null,"abstract":"The lack of modern methods for ensuring the stability of Kalman filtering under the priori uncertainty condition of the dispersion matrix measurement interference is the absence of strict criteria for choosing adaptation coefficients when calculating the posterior covariance matrix or the inability to adaptively evaluate in real time from the minimum covariance of the update sequence due to the need for its preliminary calculation. The article is devoted to the development of a new approach to adapting the Kalman filter, using the ability to obtain accurate measurements for a wide class of objects that irregularly enter their monitoring system (reference point, reference points, radio frequency identifiers, etc.). It is shown that for the distinguished case, the problem of adaptive estimation of the dispersion noise matrix of a linear meter in the Kalman filter can be solved analytically by using matrix methods of linear algebra. A numerical example illustrating the effectiveness of the procedure for estimating the state vector of a moving object based on the proposed algorithm in comparison with the traditional approach is presented. The simplicity and accuracy of the proposed algorithm provide the possibility of its effective application for the widest class of information-measuring systems. Keywords adaptive estimation; dispersion matrix of measurement noise; Kalman filter; non-periodic accurate observations","PeriodicalId":309803,"journal":{"name":"Automation. Modern Techologies","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127091180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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