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Добірка наукової літератури з теми "Drying system control"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Drying system control"

1

Di, Shuyu, and Shumei Di. "The Development and Implementation of Alcohol Plant Fan Drying Control System." International Journal of Modeling and Optimization 4, no. 2 (February 2014): 137–40. http://dx.doi.org/10.7763/ijmo.2014.v4.361.

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2

Aprillia, Bandiyah Sri, Brahmantya Aji Pramudita, and Prisma Megantoro. "Temperature Control System on Greenhouse Effect Gaplek Dryer." JURNAL INFOTEL 14, no. 1 (February 26, 2022): 50–56. http://dx.doi.org/10.20895/infotel.v14i1.736.

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Gaplek is a processed product of cassava that requires a drying process to remove the water content in cassava. Solar thermal energy can be used for the drying process of gaplek by using a greenhouse effect drying system. However, the greenhouse effect drying system using solar thermal energy is very dependent on weather conditions and temperature that is difficult to control. Therefore, a temperature control system is proposed in this study by utilizing Pulse Width Modulation (PWM) to control the exhaust fan speed. Thus, the temperature can be maintained according to the drying standard of processed cassava products. In this study, a temperature control system has been successfully created that is able to maintain the temperature in the drying room according to the drying standard, namely at a temperature of 50℃ to 60℃ when tested in three different locations, namely, Sukamaju Village, Kaligunting Village, and Sumberejo Village which have shown optimal drying temperature.
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Yuan, Yan Wei, Zheng Sun, Shu Jun Li, Xin Dong, Jun Ning Zhang, and Li Ming Zhou. "Adaptive Control System of Coated Seed Dryer." Applied Mechanics and Materials 536-537 (April 2014): 1261–66. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.1261.

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In order to improve the efficiency of the coated seed dryers, improve the drying quality and reduce energy consumption, the adaptive control technology of coated seed dryer was studied. Detection system for temperature measuring, material level measuring, and wind speed and direction measuring were fixed on the drying equipment. According to the detected data, the adaptive control system controlled the dryer blade to adjust the temperature and intensity of air intake. This technology accurately controlled the drying air temperature, moisture and moisture content in the seeds. The test results show that the drying efficiency is 1.38 times of the original dryer, while the power consumption reduces to 40.05%, and intake air temperature reduced 19.84°C, which can improve the seed activity.
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Feng, Jingxiao, and Xijuan Wang. "Research on electrical automatic control system based on PLC." Journal of Physics: Conference Series 2258, no. 1 (April 1, 2022): 012079. http://dx.doi.org/10.1088/1742-6596/2258/1/012079.

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Abstract At present, automatic control technology is widely used in the field of drying. Although the existing processing technology can basically ensure the quality of drying, there are some problems, such as low production efficiency, low thermal efficiency, uneven hot air cloth, inaccurate temperature control and so on. The application of electromagnetic technology can improve the efficiency of drying and processing. It has remarkable energy-saving effect. In the drying process, aiming at the technical problems such as incomplete volatilization of water and difficult stability of temperature in rapid drying, a drying system based on PLC control is designed in this paper. Using PLC as the main controller of the control system, through the reasonable control of the changes of temperature and humidity in the drying process, a more efficient processing process can be realized. The drying quality can be improved, and the process flow of mass processing and production can be realized. Through the experimental analysis of the drying process, it is proved that the control accuracy of the research content in this paper is more accurate, which not only improves the automation level in the drying process, but also reduces the labor cost in the process, and has high technical application value.
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Wang, Zheng Shun, Yu Dou, and Chang Jian Zhou. "Studying on Expert Control System Used in the Electromagnetic Drying." Advanced Materials Research 588-589 (November 2012): 1573–76. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.1573.

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Starting with single loop, on the base of electromagnetic drying system, simple mathematical model for paper-drying control was studied by experimental modeling and an model for drying loops of dryer was gained. The interrelation among each loops was analyzed, and a bridge among them was set up combing with worker’s experience. The coordinated control between single drying loop and several drying loops under expert control was summarized, and the system design and the program of the whole paper-drying control loops were designed.The studying of the application has shown that expert control is advanced and effective on both equipment and control precision.
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Марсов, Вадим Израилевич, Александр Маркович Колбасин, Марина Юрьевна Абдулханова, and Андрей Валентинович Курилин. "Two-channel control system of thermal drying." Automation and Control in Technical Systems, no. 2 (January 4, 2015): 132. http://dx.doi.org/10.12731/2306-1561-2014-2-13.

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Di, Shu Yu, and Huan Yu Chi. "Design and Simulation of Automatic Control System for Feed-Drier." Applied Mechanics and Materials 548-549 (April 2014): 990–94. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.990.

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Based on the research on the dynamic changes of the water content in the drying stages of using Alcohol to produce high-protein feed DDGS, advanced intelligent control method is proposed and water content in the feed and the drying time are used as the main control parameter. On the basis of one for there frequency conversion and PLC, intelligent control system for the drier fan is designed to realize the efficient control of quality online detecting and recognition in the drying process. Many problems such as low accuracy, large wastage, high cost and so on are solved and thereby the work efficiency of the drying unit is enhanced. On the basis of simulation, several test-beds were built, and a large number of experimental studies. This system proves to be the most efficient with drying and optimizing the dryer index at the different stages. The calculated results indicate that the drying method has drying efficient and energy saving features.
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Peng, Yuhao, and Tianping Ren. "Design of Heat Exchange System of Sand Core Drying Furnace." Journal of Physics: Conference Series 2083, no. 3 (November 1, 2021): 032056. http://dx.doi.org/10.1088/1742-6596/2083/3/032056.

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Abstract Heat exchange system is a circulatory drying system on sand core drying furnace. However, there are some shortcomings in the heat exchange system of sand core drying furnace in the current industrial field. For example, the temperature in the drying process is not stable enough, and the optimal temperature control parameters are difficult to choose. In this study, a proportional regulating heat exchange system is designed. The system adopts SIMATIC 1200 programmable logic controller as controller, motor-driven control valve as actuator and back propagation neural network proportion integral differential control algorithm. After sand core drying test, the results revealed that the proportional regulating heat exchange system can realize automatic control of sand core drying temperature and output the optimal combination of heat exchange system control parameters. Compared to the previous heat exchange system, it has better drying temperature control stability.
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Jia Heming, Song Wenlong, Wang Haitao, and Yang Xin. "Immune PID Algorithm of Wood Drying Control System." International Journal of Advancements in Computing Technology 4, no. 9 (May 31, 2012): 248–58. http://dx.doi.org/10.4156/ijact.vol4.issue9.29.

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KONDO, Yoshio. "A Drying System Using Wavelength Control Infrared Heater." Journal of the Surface Finishing Society of Japan 66, no. 7 (2015): 300–304. http://dx.doi.org/10.4139/sfj.66.300.

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Більше джерел

Дисертації з теми "Drying system control"

1

Fengming, Li. "Modeling and Control of Algae Harvesting, Dewatering and Drying (HDD) Systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1333480231.

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Li, Zhenfeng 1968 Oct 9. "Design of a microcontroller-based, power control system for microwave drying." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82278.

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Microwave drying is an energy-efficient drying method. The output power of most commercial microwave ovens is controlled in an intermittent fashion, where the amount of microwave energy is determined by the ratio of "ON cycles" to "OFF cycles." To provide a more efficient and continuous power control for the magnetron, a microcontroller-based, feedback power control system was developed. The system was based on a phase-control principle to achieve smooth power variations depending on a feedback temperature signal of processed products. Two temperature sensors, a thermocouple and an infrared sensor, were used to measure the temperature. A fiber-optic thermometer was used for calibration and evaluation of the system performance during microwave drying. With the IR sensor, the mean standard deviation and maximum error in temperature measurement of controlled water samples were +/-0.34ºC and +/-1.5ºC, respectively. This result demonstrated the accuracy of the IR sensor in the system control. Under the IR sensor-controlled system, carrot cubes (Daucus carota L.) lost 85.37% of their water content and resulted in better color quality than the conventional microwave-hot air convective drying without a temperature feedback control.
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Wiese, Johannes Jacobus. "System identification and model-based control of a filter cake drying process." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6654.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2011.
ENGLISH ABSTRACT: A mineral concentrate drying process consisting of a hot gas generator, a flash dryer and a feeding section is found to be the bottleneck in the platinum concentrate smelting process. This operation is used as a case study for system identification and model-based control of dryers. Based on the availability of a month's worth of dryer data obtained from a historian, a third party modelling and control software vendor is interested in the use of this data for data driven model construction and options for dryer control. The aimed contribution of this research is to use only data driven techniques and attempt an SID experiment and use of this model in a controller found in literature to be applicable to the dryer process. No first principle model was available for simulation or interpretation of results. Data were obtained for the operation from the plant historian, reduced, cleaned and investigated for deterministic information through surrogate data comparison – resulting in usable timeseries from the plant data. The best datasets were used for modelling of the flash dryer and hot gas generator operations individually, with the hot gas generator providing usable results. The dynamic, nonlinear autoregressive models with exogenous inputs were identified by means of a genetic programming with orthogonal least squares toolbox. The timeseries were reconstructed as a latent variable set, or “pseudo-embedding”, using the delay parameters as identified by average mutual information, autocorrelation and false nearest neighbours. The latent variable reconstruction resulted in a large solution space, which need to be investigated for an unknown model structure. Genetic Programming is capable of identifying unknown structures. Freerun prediction stability and sensitivity analysis were used to assess the identified best models for use in model based control. The best two models for the hot gas generator were used in a basic model predictive controller in an attempt to only track set point changes. One step ahead modelling of the flash dryer outlet air temperature was unsuccessful with the best model obtaining a validation R2 = 43%. The lack of process information contained in the available process variables are to blame for the poor model identification. One-step ahead prediction of the hot gas generator resulted in a top model with validation R2 = 77.1%. The best two hot gas generator models were implemented in a model predictive controller constructed in a real time plant data flow simulation. This controller's performance was measured against set point tracking ability. The MPC implementation was unsuccessful due to the poor freerun prediction ability of the models. The controller was found to be unable to optimise the control moves using the model. This is assigned to poor model freerun prediction ability in one of the models and a too complex freerun model structure required. It is expected that the number of degrees of freedom in the freerun model is too much for the optimiser to handle. A successful real time simulation architecture for the plant dataflow could however be constructed in the supplied software. It is recommended that further process measurements, specifically feed moisture content, feed temperature and air humidity, be included for the flash dryer; closed loop system identification be investigated for the hot gas generator; and a simpler model structure with smaller reconstructed latent variable regressor set be used for the model predictive controller.
AFRIKAANSE OPSOMMING: 'n Drogings proses vir mineraal konsentraat bestaan uit drie eenhede: 'n lug verwarmer-, 'n blitsdroeër- en konsentraat toevoer eenheid. Hierdie droeër is geïdentifiseer as die bottelnek in die platinum konsentraat smeltingsproses. Die droeër word gebruik as 'n gevallestudie vir sisteem identifikasie asook model-gebasseerder beheer van droeërs. 'n Maand se data verkry vanaf die proses databasis, het gelei tot 'n derde party industriële sagteware en beheerstelsel maatskappy se belangstelling in data gedrewe modelering en beheer opsies vir die drogings proses. Die doelwit van hierdie studie is om data gedrewe modeleringstegnieke te gebruik en die model in 'n droeër-literatuur relevante beheerder te gebruik. Geen eerste beginsel model is beskikbaar vir simulasie of interpretasie van resultate nie. Die verkrygde data is gereduseer, skoon gemaak en bestudeer om te identifiseer of die tydreeks deterministiese inligting bevat. Dit is gedoen deur die tydreeks met stochastiese surrogaat data te vergelyk. Die mees gepaste datastelle is gebruik vir modellering van die blitsdroeër en lugverwarmer afsonderlik. Die nie-liniêre, dinamiese nie-linieêre outeregressie modelle met eksogene insette was deur 'n genetiese programmering algoritme, met ortogonale minimum kwadrate, identifiseer. Die betrokke tydreeks is omskep in 'n hulp-veranderlike stel deur gebruik te maak van vertragings-parameters wat deur gemiddelde gemeenskaplike inligting, outokorrelasie en vals naaste buurman metodes verkry is. Die GP algoritme is daartoe in staat om the groot oplossings ruimte wat deur hierdie hulp-veranderlike rekonstruksie geskep word, te bestudeer vir 'n onbekende model struktuur. Die vrye vooruitskattings vermoë, asook die model sensitiwiteit is inag geneem tydens die analiese van die resultate. Die beste modelle se gepastheid tot model voorspellende beheer is gemeet deur die uitkomste van 'n sensitiwiteits analise, asook 'n vrylopende voorspelling, in oënskou te neem. Die een-stap vooruit voorspellende model van die droeër was onsusksesvol met die beste model wat slegs 'n validasie R2 = 43% kon behaal. Die gebrekkige meet instrumente in die droeër is te blameer vir die swak resultate. Die een-stap vooruit voorspellende model van die lug verwarmer wat die beste gevaar het, het 'n validasie R2 = 77.1% gehad. 'n Basiese model voorspellende beheerder is gebou deur die 2 beste modelle van slegs die lugverwarmer te gebruik in 'n intydse simulasie van die raffinadery data vloei struktuur. Hierdie beheerder se vermoë om toepaslike beheer uit te oefen, is gemeet deur die slegs die stelpunt te verander. Die beheerder was egter nie daartoe in staat om die insette te optimeer, en so die stelpunt te volg nie. Hierdie onvermoë is as gevolg van die kompleks vrylopende model struktuur wat oor die voorspellingsvenster optimeer moet word, asook die onstabiele vryvooruitspellings vermoë van die modelle. Die vermoede is dat die loslopende voorspelling te veel vryheids grade het om die insette maklik genoeg te optimeer. Die intydse simulasie van die raffinadery se datavloei struktuur was egter suksesvol. Beter meting van noodsaaklike veranderlikes vir die droër, o.a. voginhoud van die voer, voer temperatuur, asook lug humiditeit; geslotelus sisteem identifikasie vir die lugverwarmer; asook meer eenvoudige model struktuur vir gebruik in voorspellende beheer moontlik vermag deur 'n kleiner hulp veranderlike rekonstruksie te gebruik.
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LIMA, Wellington Sousa. "Análises de sistemas de secagem: solar, elétrico e misto na produção de banana passa." Universidade Federal de Campina Grande, 2017. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/969.

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Submitted by Emanuel Varela Cardoso (emanuel.varela@ufcg.edu.br) on 2018-06-13T19:01:17Z No. of bitstreams: 1 WELLINGTON SOUSA LIMA – TESE (PPGEP) 2016.pdf: 9442067 bytes, checksum: da59f22d2d376fa121ab8bae0ba8d2e4 (MD5)
Made available in DSpace on 2018-06-13T19:01:17Z (GMT). No. of bitstreams: 1 WELLINGTON SOUSA LIMA – TESE (PPGEP) 2016.pdf: 9442067 bytes, checksum: da59f22d2d376fa121ab8bae0ba8d2e4 (MD5) Previous issue date: 2017-03-17
Este trabalho apresenta um estudo comparativo de sistemas de secagem para produção de banana passa. Foram utilizados um secador solar de exposição indireta com sistema de aquisição e controle das propriedades termodinâmicas do ar de secagem, e um secador elétrico automatizado com sistema de supervisão e controle embarcados . Os sistemas de secagem estudados neste trabalho foram: secagem solar, secagem elétrica e secagem mista (secagem solar seguida de secagem elétrica). Os testes experimentais foram realizados na UFCG em Campina Grande, PB, para secagem de banana prata (Musa spp.). O produto final obtido pelos três sistemas de secagem apresentou boa qualidade em relação ao aspecto visual, com um percentual de umidade em base úmida menor que 25%, compatível com o recomendado pela Resolução RDC n° 272/05 da ANVISA. O sistema de aquisição e controle de dados, como inovação no secador solar, utilizando a plataforma Arduino, garantiu a medição de temperatura e umidade relativa do ar de secagem nas entradas e saídas do coletor solar e da câmara de secagem, e também o acionamento e controle da convecção forçada no sistema de secagem para manter a temperatura no interior da câmara de secagem entre 40ºC e 60ºC. Como resultado, são apresentados os valores obtidos para rendimento do secador solar, consumo específico de energia (CEE), eficiência do processo de secagem e tempo de secagem. Por meio dos experimentos com o secador solar e com o secador elétrico foram obtidas as curvas de cinética de secagem da banana. Os resultados foram comparados e mostraram que o modelo matemático de Page é apropriado para predizer o tempo de secagem. O coeficiente de determinação (R²) obtido na secagem elétrica, na secagem mista e na secagem solar com controle, foram superiores ao obtido na secagem solar sem controle, isso demostra a importância do controle das propriedades termodinâmicas nos processos de secagem. Com relação ao CEE, o processo de secagem elétrica apresentou um CEE de 379,33 kWh por ciclo com temperatura de 45ºC e 225,54 kWh por ciclo com temperatura de 55ºC. Por outro lado o processo de secagem mista apresentou um CEE de 295,87 kWh por ciclo, a uma temperatura de 45ºC, e o processo de secagem solar apresentou um CEE médio de 45,83 kWh por ciclo. Isso mostra a grande vantagem comparativa do secador solar em relação ao secador elétrico. Com relação à eficiência mássica para os três processos de secagem, os mesmos apresentaram eficiências mássicas equivalentes em torno de 89%, o que já era esperado. Com relação aos rendimentos térmicos do secador solar, obtidos nos processos de secagem solar com controle e sem controle da temperatura , foram respectivamente 27,85% e 30,65%. Esses resultados são ligeiramente maiores que os reportados na literatura, o que indica que o secador solar desenvolvido na UFCG apresenta um elevado padrão na secagem de banana, além do fácil manuseio, construção e operacionalidade.
This paper presents a comparative study of drying systems for the production of dried bananas. An indirect solar exposure dryer with acquisition system and control of the thermodinamic properties of the drying air, and an automatized electric dryer with embedded control and supervision system were used. The drying systems studied in this paper were: solar drying, electrical drying and mixed drying (solar drying followed by electrical drying). The experimental tests were performed at the UFCG in Campina Grande, PB, for the drying of bananas (Musa spp.). The final product obtained by the three drying systems presented good visual aspect, scent and flavour, and moisture percentage at moist base less than 25%, compatible to the resolution RDC nº 272/05 of the ANVISA. The acquisition system a nd data control, added as inovation at the solar dryer, using the Arduino plataform, granted the measurement of the temperature and air relative moisture of drying air, both in the entrance and exit of the solar colector of the drying chamber, and also the activation and control of the forced convection of the drying system to keep the temperature in the drying chamber between 40ºC and 60ºC. As results, the obtained values to the drying system efficiency are presented, specific comsuption of energy (CEE), drying system efficiency and drying time. Through the experiments with the solar and the electric dryers, the curves that represent the drying kinectics of the banana were obtained. The results were compared and showed that Page’s mathematical model is adequate to predict the drying time. The determination coefficient (R²) obtained at the electric dryer was superior to the solar dryer, this shows that the control system of the thermodinamics properties of the drying air is more efficient on the electric dryer. In relation to the CEE, the electric drying showed a CEE of 379.33 kWh per cycle with a temperature of 45ºC and 225.54 kWh per cycle at the temperature of 55ºC . On the other hand, the mixed drying had a CEE of 295.87 kWh per cycle, at a temperature of 45 ºC, and the solar drying a medium CEE of 45.83 kWh per cycle. This shows the great comparative advantage of the solar dryer when compared to the electric dryer. In relation to the massic efficiency to the 3 drying processes, they showed equivalente massi c efficiency around 89%, which was expected. In relation to the thermic efficiencies of the solar dryer, obtained on the experiments with and without temperature control, were respectively 27.85%, 30.65%, these results show that the obtained resulsts are slightly superior to the results reported on the literature, which indicates that the solar dryer under development in the UFCG shows high efficiency to perform the drying of bananas, although its easy to construct and operate.
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Евсина, Наталья Александровна. "Синтез нечеткого регулятора для системы управления процессом сушки капиллярно-пористых материалов". Thesis, НТУ "ХПИ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/19590.

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Диссертация на соискание ученой степени кандидата технических наук по специальности 05.13. 03 - системы и процессы управления. - Национальный технический университет "Харьковский политехнический институт", Харьков, 2015. Диссертация посвящена разработке и совершенствованию метода синтеза нечеткого регулятора, который обеспечивает заданное качество управления сушкой капиллярно-пористых материалов в конвекционной сушилке периодического действия и позволяет создавать системы управления, опирающиеся на экспертные знания. В диссертационной работе усовершенствован метод анализа чувствительности оптимального управления в линейной системе при квадратичном критерии качества, который позволил получить условия нечувствительности этого управления в замкнутой системе к малым изменениям параметров. Показано, что в общем случае необходимо совместное исследование чувствительности оптимизируемого функционала и чувствительности оптимальной траектории движения. Предложенный в работе алгоритм синтеза нечеткого логического регулятора позволяет использовать стандартную форму описания лингвистических переменных и минимальный набор управляющих правил. В работе выполнена оптимизация параметров и структуры нечетких регуляторов, что позволяет с небольшим количеством управляющих правил решать задачу выбора значений коэффициентов регулятора, который минимизирует критерий качества переходного процесса.
The thesis on Candidate Degree in Technical Sciences: Specialty 05.13. 03 - management systems and processes.– National Technical University "Kharkov Polytechnic Institute", Kharkov 2015. This thesis is devoted to the development and improvement of the synthesis method of a fuzzy regulator which ensures the specified quality to control the drying of the capillary and porous materials in a convection oven of periodic action and allows creating the control systems basing on the expert knowledge. The work describes the improved method of the optimal control sensitivity analysis in a linear system with a quadratic quality criterion which allowed obtaining the control insensitivity conditions to a slightly changed parameters in a closed system. Basing on the performed analysis the thesis shows the necessity to perform a joint research of the optimized functionality sensitivity and the sensitivity of the optimal movementtrajectory. The thesis offers a simple synthesis algorithm of the fuzzy and logical regulator which provides the ability to use a standard format describing the linguistic variables and a minimum set of the operating rules. The regulators built on the basis of fuzzy logic in some cases are capable to provide higher quality rates of the transition processes in comparison with classic regulators. Using the synthesis methods of fuzzy control algorithms, it is possible to optimize the difficult control loops omitting mathematical model specification.
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Євсіна, Наталя Олександрівна. "Синтез нечіткого регулятора для системи управління процесом сушіння капілярно-пористих матеріалів". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/19587.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.13. 03 – системи та процеси управління. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2015. Дисертацію присвячено розробці та вдосконаленню методу синтезу нечіткого регулятора, який забезпечує задану якість управління сушінням капілярно – пористих матеріалів в конвекційній сушарці періодичної дії та дозволяє створювати системи управління, що спираються на експертні знання. Удосконалено метод аналізу чутливості оптимального управління в лінійній системі при квадратичному критерії якості, який дозволив отримати умови нечутливості цього управління в замкнутій системі до малих змін параметрів. Показано, що в загальному випадку необхідно спільне дослідження чутливості функціонала, що оптимізується і чутливості оптимальної траєкторії руху. Запропоновано алгоритм синтезу нечітко-логічного регулятора, що дозволяє використовувати стандартну форму опису лінгвістичних змінних і мінімальний набір керуючих правил. Здійснено синтез нечітких регуляторів з оптимізацією їх параметрів і структури та запропоновано структурну схему нечіткого контролера. В роботі розроблені імітаційні моделі процесу сушіння КПМ, що описують зміну температури і вологості при природній та комбінованої циркуляції сушильного агенту в камерній сушарці періодичної дії, які використовуються для налаштування адаптивних нечітких регуляторів. Синтезований адаптивний нечіткий регулятор стабілізації температури сушильного агенту дозволяє в широкому діапазоні факторів, що збурюють, отримати мінімальний покращений критерій якості системи управління в порівнянні з класичним регулятором.
The thesis on Candidate Degree in Technical Sciences: Specialty 05.13. 03 - management systems and processes.– National Technical University "Kharkov Polytechnic Institute", Kharkov 2015. This thesis is devoted to the development and improvement of the synthesis method of a fuzzy regulator which ensures the specified quality to control the drying of the capillary and porous materials in a convection oven of periodic action and allows creating the control systems basing on the expert knowledge. The work describes the improved method of the optimal control sensitivity analysis in a linear system with a quadratic quality criterion which allowed obtaining the control insensitivity conditions to a slightly changed parameters in a closed system. Basing on the performed analysis the thesis shows the necessity to perform a joint research of the optimized functionality sensitivity and the sensitivity of the optimal movementtrajectory. The thesis offers a simple synthesis algorithm of the fuzzy and logical regulator which provides the ability to use a standard format describing the linguistic variables and a minimum set of the operating rules. The regulators built on the basis of fuzzy logic in some cases are capable to provide higher quality rates of the transition processes in comparison with classic regulators. Using the synthesis methods of fuzzy control algorithms, it is possible to optimize the difficult control loops omitting mathematical model specification.
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Li, Zhenfeng 1968 Oct 9. "Aroma detection and control in passive and dynamic food systems for superior product." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115879.

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Passive (static) and dynamic studies have shown aroma to be an important aspect of food quality, which can be used to differentiate, classify, and grade foodstuffs, and in some cases it can be used to predict other quality characteristics. Monitoring and control of food aroma changes during food processing can significantly improve the quality of the final product in terms of flavour, color, taste, and overall appearance. Hence, it is a prominent and urgent field of study in the post production systems.
Passive aroma detection of unprocessed foods and dynamic aroma detection during food processing was undertaken using a fast GC analyzer -- zNose. During the study on the passive aroma detection, the aroma of Chinese spirits (Fenjiu) and mango (Mangifera indica L.) fruits, (i.e., liquid and solid states, respectively) was analyzed. In the study of Chinese spirits, aroma profiles of Fenjiu liquor samples of different quality levels were acquired and used for quality classification and prediction. Measurements of dielectric properties of the samples were also conducted to estimate alcohol concentration. In the study of mango fruits, aroma changes of mango samples were monitored during their shelf life and used to evaluate mango quality. Ripening and rots were detected with 80% and 93% accuracy, respectively.
During the study of dynamic aroma detection, a real-time aroma monitoring and control system was developed for use during microwave drying. Aroma signals of a processed food item were detected with zNose and analyzed with a fuzzy logic algorithm to determine the optimal food drying temperature. Phase control was used to adjust the microwave power level to meet temperature requirements. Carrot (Daucus carota L.) and apple (Malus domestica Borkh) were selected as representatives of vegetables and fruits. In carrot drying, samples could be dried in a short time at high temperatures but the interior of some sample cubes was burnt. Drying at a lower temperature extended the drying process, but led to a great loss of aroma in the finished product.' The best results were obtained at 60°C. Based on these results, a fuzzy logic controller was designed and employed to control the drying process according to carrot aroma changes. To investigate the possibility of aroma improvement without zNose assistance, a linear control method was developed whereby a temperature control profile imitated the fuzzy logic control, but aroma control was not included. With these new control strategies, the carrot color and flavour were significantly improved and less time and power were consumed. Similar results were achieved when apple was microwave-dried. Apple aroma was monitored online during microwave drying processes and controlled with similar fuzzy and linear control strategies. Apple color, aroma, and overall appearance remained intact with the new strategies and less time and power were consumed. In contrast to the carrot drying, a different linear temperature profile was required for apple drying in terms of aroma retention.
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Raut, Sharvari [Verfasser]. "Optimizing drying processes for agricultural products utilising non-invasive measurement and adaptive control systems / Sharvari Raut." Kassel : Universitätsbibliothek Kassel, 2021. http://d-nb.info/1240918372/34.

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Shin, Hae Soo. "Effect of irrigation systems, partial root zone drying irrigation and regulated deficit, on plant parasitic nematode populations in grapevine." University of Western Australia. School of Earth and Geographical Sciences, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0046.

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[Truncated abstract] Nematodes are known to significantly affect productivity of grapevines worldwide. Although major surveys have been carried out on nematodes infesting roots of grapevines elsewhere, only a preliminary survey has been carried out in Western Australia (W.A.). This study on the effect of irrigation systems on pathogenicity of nematodes on vines commenced with a survey of nematodes in two major grapegrowing regions of W.A. In this survey, soil samples were taken from 5 vineyards from Margaret River and 7 vineyards from Swan Valley regions of the state. Root-knot nematode (Meloidogyne spp.) was found to be the dominant genus in both major grape growing regions. Meloidogyne spp. occurred 76% and 75% of total soil sample in Margaret River and Swan Valley. The highest density of Meloidogyne spp. was 7 nematodes/g soil in Margaret River and 3.17 nematodes/g soil in Swan Valley. In both regions, other plant parasitic nematodes were recorded that included the root lesion (Pratylenchus spp.), dagger (Xiphinema spp.) and stubby (Trichodorus spp.) nematodes. Paratylenchus spp. were found in a few soil samples from Margaret River region, and Helicotylenchus spp. were found only in Swan Valley region, but was widespread. Some vineyards have established only resistant cultivars (Schartzman, Ramsey and 34 EM) resistant to nematodes. In these vineyards total nematode population was lower than most of other vineyards. However, in comparison of nematode numbers between cultivars, there were lower number of nematodes in some susceptible cultivars than in the resistant cultivars. Most common nematode taxa were Meloidogyne, Pratylenchus and Xiphinema in both regions. Root-knot and root lesion nematodes were the most widespread and economically important genera. These two genera are known to have different life cycle and feeding habits.
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Čermák, Jiří. "Návrh elektročásti zařízení na máčení a sušení jader pro tvorbu odlitků." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318169.

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This diploma thesis deals with proposal of electrical equipment for soaking and drying cores for making castings at foundry in a Great Britain. It brings look at system of technical norms ČSN and it compares it with british system of technical norms British standards. The second part of this thesis contains detailed proposal of this equipment, including specification of control system, specification of power supply cables and control cables and particular technological units. The whole project documentation is enclosed as an inseparable attachment of this diploma thesis.
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Книги з теми "Drying system control"

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Holmes, Jonathan, and Philipp Hoelzmann. The Late Pleistocene-Holocene African Humid Period as Evident in Lakes. Oxford University Press, 2017. http://dx.doi.org/10.1093/acrefore/9780190228620.013.531.

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From the end of the last glacial stage until the mid-Holocene, large areas of arid and semi-arid North Africa were much wetter than present, during the interval that is known as the African Humid Period (AHP). During this time, large areas were characterized by a marked increase in precipitation, an expansion of lakes, river systems, and wetlands, and the spread of grassland, shrub land, and woodland vegetation into areas that are currently much drier. Simulations with climate models indicate that the AHP was the result of orbitally forced increase in northern hemisphere summer insolation, which caused the intensification and northward expansion of the boreal summer monsoon. However, feedbacks from ocean circulation, land-surface cover, and greenhouse gases were probably also important.Lake basins and their sediment archives have provided important information about climate during the AHP, including the overall increases in precipitation and in rates, trajectories, and spatial variations in change at the beginning and the end of the interval. The general pattern is one of apparently synchronous onset of the AHP at the start of the Bølling-Allerød interstadial around 14,700 years ago, although wet conditions were interrupted by aridity during the Younger Dryas stadial. Wetter conditions returned at the start of the Holocene around 11,700 years ago covering much of North Africa and extended into parts of the southern hemisphere, including southeastern Equatorial Africa. During this time, the expansion of lakes and of grassland or shrub land vegetation over the area that is now the Sahara desert, was especially marked. Increasing aridity through the mid-Holocene, associated with a reduction in northern hemisphere summer insolation, brought about the end of the AHP by around 5000–4000 years before present. The degree to which this end was abrupt or gradual and geographically synchronous or time transgressive, remains open to debate. Taken as a whole, the lake sediment records do not support rapid and synchronous declines in precipitation and vegetation across the whole of North Africa, as some model experiments and other palaeoclimate archives have suggested. Lake sediments from basins that desiccated during the mid-Holocene may have been deflated, thus providing a misleading picture of rapid change. Moreover, different proxies of climate or environment may respond in contrasting ways to the same changes in climate. Despite this, there is evidence of rapid (within a few hundred years) termination to the AHP in some regions, with clear signs of a time-transgressive response both north to south and east to west, pointing to complex controls over the mid-Holocene drying of North Africa.
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Частини книг з теми "Drying system control"

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Chang, T. N., and Y. H. Ma. "Application of Optimal Control Strategy to Hybrid Microwave and Radiant Heat Freeze Drying System." In Drying ’85, 249–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-662-21830-3_31.

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Fei, Qiang, BiaoJin, Lijing Yan, Lian Yao Tang, and Rong Chen. "Research on Intelligent Control System of Corn Ear Vertical Drying Bin." In Advanced Intelligent Technologies for Industry, 249–54. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9735-7_23.

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Gao, Xiaoyang, Yang Bi, Lili Zhang, Jingjing Chen, and Jianmin Yun. "The Temperature Fuzzy Control System of Barleythe Malt Drying Based on Microcontroller." In IFIP Advances in Information and Communication Technology, 771–78. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0209-2_79.

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Fauchoux, M. T., C. J. Simonson, D. A. Torvi, R. M. Eldeeb, and T. Ojanen. "Cost Effective and Energy Efficient Control of Indoor Humidity in Buildings with Hygroscopic Building Materials and Desiccants in the HVAC System." In Drying and Wetting of Building Materials and Components, 175–96. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04531-3_8.

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Martynenko, Alex. "What Is the Future of Intelligent Systems in Drying?" In Intelligent Control in Drying, 441–43. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018. | Series: Advances in drying science & technology: CRC Press, 2018. http://dx.doi.org/10.1201/9780429443183-22.

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Nadian, Mohammad Hossein. "Intelligent Control of Fruit Drying Based on Computer Vision Systems." In Intelligent Control in Drying, 253–80. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018. | Series: Advances in drying science & technology: CRC Press, 2018. http://dx.doi.org/10.1201/9780429443183-14.

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Aghbashlo, Mortaza, Soleiman Hosseinpour, and Arun S. Mujumdar. "Artificial Neural Network-Based Modeling and Controlling of Drying Systems." In Intelligent Control in Drying, 155–72. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018. | Series: Advances in drying science & technology: CRC Press, 2018. http://dx.doi.org/10.1201/9780429443183-9.

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Bobkov, Vladimir, Maksim Dli, and Alexandr Fedulov. "Simulation Modeling for Drying Process of Pellets from Apatite-Nephenine Ores Waste." In Studies in Systems, Decision and Control, 241–51. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66081-9_19.

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Dubois, Olivier, Jean-Louis Nicolas, and Alain Billat. "A Radial Basis Function Network Model for the Adaptive Control of Drying Oven Temperature." In Neural Network Engineering in Dynamic Control Systems, 239–54. London: Springer London, 1995. http://dx.doi.org/10.1007/978-1-4471-3066-6_12.

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Bobkov, Vladimir, and Maksim Dli. "Optimal Control for Energy and Resource Efficiency in the Drying Process of Pellets from Apatite-Nepheline Ores." In Studies in Systems, Decision and Control, 253–62. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66081-9_20.

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Тези доповідей конференцій з теми "Drying system control"

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Artemova, Svetlana V., Anatoli A. Artemov, Andrey I. Ladynin, and Maria A. Kamenskaia. "Drying Control Information System." In 2020 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (EIConRus). IEEE, 2020. http://dx.doi.org/10.1109/eiconrus49466.2020.9039189.

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Kozlova, Liudmila P., Aleksandr M. Belov, and Olga A. Kozlova. "Cellulose Drying Machine Control System Simulation." In 2021 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (ElConRus). IEEE, 2021. http://dx.doi.org/10.1109/elconrus51938.2021.9396264.

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Wei Zhang, Li Peng, and Ning Gao. "New far-infrared drying control system design." In 2010 Chinese Control and Decision Conference (CCDC). IEEE, 2010. http://dx.doi.org/10.1109/ccdc.2010.5498559.

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LI, CHANGYOU, and HUA BAN. "SELF-ADAPTIVE CONTROL SYSTEM OF GRAIN DRYING DEVICE." In The Proceedings of the 5th Asia-Pacific Drying Conference. World Scientific Publishing Company, 2007. http://dx.doi.org/10.1142/9789812771957_0073.

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Ma, Hong, Wei Zhang, and Simon X. Yang. "Systems modeling and intelligent control of meat drying process." In 2015 10th System of Systems Engineering Conference (SoSE). IEEE, 2015. http://dx.doi.org/10.1109/sysose.2015.7151964.

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Gerasimov, Dmitriy A., Anton I. Sidorenko, Evgeniy S. Povernov, and Evgeniy V. Sypin. "System of automated process control of vacuum drying." In 2012 IEEE 13th International Conference and Seminar of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM 2012). IEEE, 2012. http://dx.doi.org/10.1109/edm.2012.6310214.

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Jiang, Zhaoliang, Wenping Liu, Qingyue Wei, and Zhishen Li. "Temperature Simulation and Control System for Automobile Coating Line Drying Rooms." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9375.

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Product manufacturing systems are one of the largest energy consumers. Focusing on the production of the automobile body coating in particular, the authors investigate the drying system of coating line to improve the energy efficiency during the drying process of the parts. First, The flow field of a drying room is simulated with FEM. Then, an applicable regulation system for controlling the energy loss is built. The proposed method effectively improves the energy utilization of the drying system; thus, decreasing energy loss.
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Situmorang, Zakarias, Retantyo Wardoyo, Sri Hartati, Jazi Eko Istiyanto, Abdul Halim Hakim, Pandian Vasant, and Nader Barsoum. "COMPUTATION OF PARAMETRIC ADAPTIVE FUZZY CONTROLLER FOR WOOD DRYING SYSTEM." In POWER CONTROL AND OPTIMIZATION: Proceedings of the Second Global Conference on Power Control and Optimization. AIP, 2009. http://dx.doi.org/10.1063/1.3223923.

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Liu, Tong, Shan Liang, and Jinglu Hu. "Expert Control System based Hierarchical Control Strategy for Tunnel Microwave Rice Drying." In 2019 18th European Control Conference (ECC). IEEE, 2019. http://dx.doi.org/10.23919/ecc.2019.8795661.

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Lili Zhang and Xiangyou Wang. "Research on real-time control system of infrared drying process." In 2010 3rd IEEE International Conference on Computer Science and Information Technology (ICCSIT 2010). IEEE, 2010. http://dx.doi.org/10.1109/iccsit.2010.5564925.

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Звіти організацій з теми "Drying system control"

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ANGLESEY, M. O. System Configuration Management Implementation Procedure for the Cold Vacuum Drying Facility Monitoring and Control System. Office of Scientific and Technical Information (OSTI), October 2000. http://dx.doi.org/10.2172/805643.

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WHITEHURST, R. Cold Vacuum Drying (CVD) Facility Safety Class Instrumentation & Control System Design Description. Office of Scientific and Technical Information (OSTI), December 1999. http://dx.doi.org/10.2172/798859.

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WHITEHURST, R. Cold Vacuum Drying (CVD) Facility Safety Class Instrumentation and Control System Design Description SYS 93-2. Office of Scientific and Technical Information (OSTI), July 1999. http://dx.doi.org/10.2172/797516.

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