Scientific and Technical Journal

ELECTROTECHNIC AND COMPUTER SYSTEMS

ISSN Print 2221-3937
ISSN Online 2221-3805
ADAPTIVE MINIMAX CRITERION AS A MEANS OF INCREASING THE ACCURACY OF DETERMINING THE INITIAL PARAMETERS OF MANAGED OBJECTS
Abstract:

The article directs to improve the accuracy of output quantities of complex managed objects, including cochlear feeders in the mining-ore industry. The aim of this work is developing of adaptive minimax criterion that provides virtually unchanged accuracy determination of ratio of solid/liquid under the conditions of action of complex and prolonged disturbances. The goal is solved by solving the problems managed object analysis, theoretical description of minimax criterion, substantiation and analysis changes the parameter defining criterion, development the algorithm of realization of criterion and valuation of output parameter of object. The problems were solved by methods of analysis, theory of automatic control, physical modeling the theory of error, the theory of sensitivity. It was got analytical dependence for determining the optimal duration averaging the output value (Minimax),it was substantiated decisive criterion setting, it was found the connection velocity of change of the output value (vacuum) with the duration of the transitional process, it was obtained accordance the duration of intervals averaging ranges of variation the output value in transitional process, it was appreciated obtained minimax, it was elaborated the algorithm of discovering the ratio of solid / liquid using adaptive minimax criterion, it was made valuing of determining the initial value. Minimax criterion includes 14 cycles of working cochlear feeder with length of 1.56 sec. The best results of formation the output value correspond to the minimum initial duration of averaging 1.56 with a further increasing it of the same quantity accordingly velocity of change of the pulp dilution, reaching minimax 21,84 sec. Then increase the duration averaging is not necessary. The discovered conditions of realization minimax criterion provide high accuracy of the output value in the most complicated exploitation conditions. The adaptive minimax criterion realizes automatically by controller. This can significantly to increase the accuracy and effectiveness of functioning of the systems automatic control of technological process.

Authors:
Keywords
DOI
References
  1. Maljarov, P.V. Basics of intensification of ore preparation processes[Osnovy intensifikacii processov rudopodgotovki], (2004), Rostov-on-Don, Russian Federation, 320 p.
  2. Pivnjak, G.G., Vajsberg, L.A., and Kirichenko, V.I.Grinding. Energy and technology[Izmel'chenie. Jenergetika i tehnologija], (2007), Moscow, Russian Federation, 296 p.
  3. Kupіn, A.І.Intellectual identification and management in the context of enrichment technology processes[Іntelektual'na іdentifіkacіja ta keruvannja v umovah procesіv zbagachuval'noї tehnologії], (2008), Kryvyi Rih, Ukraine, 204 p.
  4. Petrov, B.N., Viktorov, V.A., Lunkin, B.V., and Sovlukov, A.S. The principle of invariance in measuring technology[Princip invariantnosti v izmeritel'noj tehnike], (1976), Moscow, Russian Federation, 242 p.
  5. Tuz, Ju.M. Structural methods for improving the accuracy of measuring instruments[Strukturnye metody povyshenija tochnosti izmeritel'nyh priborov], (1976), Kyiv, Ukraine, 265 p.
  6. Bodner, V.A. Primary information devices[Pribory pervichnoj informacii], (1981), Moscow, Russian Federation, 344 p.
  7. Rudzit, Ja.A., and Plutalov, V.N. Fundamentals of Metrology, Accuracy and Reliability in Instrument Making[Osnovy metrologii, tochnost' i nadezhnost' v priborostroenii], (1991), Moscow, Russian Federation, 304 p.
  8. Kondratec', V.O., and Serbul, O.M. Substantiation of the computer identification system and regulation of pulp liquefaction in ball mills with circulating load[Obg'runtuvannja systemy komp’juternoi' identyfikacii' ta reguljuvannja rozridzhennja pul'py u kul'ovyh mlynah z cyrkuljujuchym navantazhennjam], (2013), Bulletin of the Kryvyi Rih National University, Kryvyi Rih, Ukraine, No. 34, pp.45-50.
  9. Kondratec, V.A. Automatic system for identification of pulp liquefaction in a ball mill, grinding sands of a double-spiral classifier[Avtomaticheskaja sistema identifikacii razzhizhenija pul'py v sharovoj mel'nice, izmel'chajushhej peski dvuhspiral'nogo klassifikatora], (2014), Bulletin of the Irkutsk State Technical University, Irkutsk, Russian Federation, No. 2, pp.12-20.
  10. Macuj, A.M., and Kondratec, V.A. Automatic stabilization of the ore / water ratio in ball mills that grind sands of the classifier[Avtomatichna stabіlіzacіja spіvvіdnoshennja ruda/voda v kul'ovih mlinah, shho podrіbnjujut' pіski klasifіkatora], (2012), New materials and technologies in metallurgy and machine building, Zaporizhzhia, Ukraine, №2, pp. 115-119.
  11. Menskij, B.M. The principle of invariance in automatic regulation and control[Princip invariantnosti v avtomaticheskom regulirovanii i upravlenii], (1972), Moscow, Russian Federation, 248 p.
  12. Fomin, V.N.Recurrent estimation and adaptive filtering[Rekurrentnoe ocenivanie i adaptivnaja fil'tracija], (1984), Moscow, Russian Federation, 288 p.
  13. Aliev, T.M., and Ter-Hachaturov,T.M. Measuring technology[Izmeritel'naja tehnika], (1991), Moscow, Russian Federation, 384 p.
  14. Solodovnikov, V.V. Statistical dynamics of linear automatic control systems[Statisticheskaja dinamika linejnyh sistem avtomaticheskogo upravlenija], (1960), Moscow, Russian Federation, 600 p.
  15. Ventcel', E.S. Theory of Probability[Teorija verojatnostej], (1969), Moscow, Russian Federation, 576 p.
  16. Vilenkin, S.Ja. Statistical methods of investigation of automatic control systems[Statisticheskie metody issledovanija sistem avtomaticheskogo regulirovanija], (1967), Moscow, Russian Federation, 200 p.
  17. Monsik, V.B., and Skrynnikov, A.A. Probability and Statistics[Verojatnost' i statistika], (2013), Moscow, Russian Federation, 381 p.
  18. Dem'janov, V.F., and Malozemov, V.N. Introductions to the minimax[Vvedeniе v minimaks], (1972), Moscow, Russian Federation, 368 p.
  19. Levin, B. R. Theoretical bases of statistical radio engineering[Teoreticheskie osnovy statis-ticheskoj radiotehniki], (1975), Moscow, Russian Federation, 392 p.
  20. Kondratec, V. A. Mathematical modeling of the cochlear feeder of a ball mill as a control object[Matematicheskoe modelirovanie ulitkovogo pitatelya sharovoi mel'nitsy kak ob"ekta upravleniya], (2014), Transactions of Kremenchuk Mykhailo Ostrohradskyi National University, Kremenchuk, Ukraine, No. 3, pp. 64-70.
Published:
Last download:
2017-11-17 05:11:16

[ © KarelWintersky ] [ All articles ] [ All authors ]
[ © Odessa National Polytechnic University, 2014. Any use of information from the site is possible only under the condition that the source link! ]
Яндекс.Метрика