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Proceedings of the Technical university of Sofia, 1995 -
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Последно депозирани

Proceedings of the Technical university of Sofia, 1995 -: Последно депозирани

Показване на публикации 701-720 от 853

Заглавие: Control techniques in DSP - based step motor drives Автор: Dzhiev, Stancho Nikolov; Джиев, Станчо Николов; Манчев, Станко; Manchev, Stanko Дата: 1999 Резюме: Control methods for DSP-based step motor drives are investigated and implemented. The control system utilizes a digital signal processor. The methods are used for on-line identification and adaptation for varying motor parameters and conditions. Results are given for different sizes of hybrid step motors. It has been proved that the performance ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Изследване на двулентов кръстат пружинен шарнир с приложение в жироскопични уреди за измерване на сила и маса Автор: Цонев, Никола Иванов; Tsonev, Nikola Ivanov Дата: 1995 Резюме: The useful simple plant models can hardly reflect the complex character of the technological processes, The existing uncertainty is considered by both the robust and the fuzzy approaches and each of them achieves system robustness via simple procedure for the design of easy for completion control algorithms. The robust approach embeds the ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Ефективност на системите за управление при шум в регулиращите органи Автор: Николов, Емил Костов; Nikolov, Emil Kostov Дата: 1999 Резюме: A method for a quantitative estimation and a comparative analysis according to summarized indexes of the performance and the effectiveness of the control systems under noise conditions in the control valves are proposed. Numerical samplers are solved. The results of parallel simulations are shown. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Невронно мрежеви модел на вокалния тракт за целите на психо-физиологичната диагностика на индивида Автор: Гълъбов, Васил Тотев; Galabov, Vasil Totoev Дата: 1999 Резюме: The operational readiness of the man-machine system depends mostly on the passing psycho-physiological condition of the operator, on his interaction with other people and machines. In this paper is proposed a method for non-invasive in situ diagnosis of the operator via his speech. For this aim is designed a model of the vocal tract with ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Анализ на информационната структура на управленски решения Автор: Сапунджиев, Георги Нешев; Sapundzhiev, Georgi Neshev Дата: 1999 Резюме: The current article deals with quality analysis and management decisions approach, which are to be taken within difficult systems, cousidering the initial indefinity, the quantity of the available information and the preset time for choosing optimal alternative. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Синхронизирано управление на двудвигателни електромеханични системи Автор: Михов, Михо Рачев; Mihov, Miho Rachev Дата: 1999 Резюме: This paper presents a control method for dual-motor electromechanical systems, by which synchronisation of some principal controllable variables is required. An appropriate control algorithm is offered and some results of computer simulation of a DC dual-motor system with speed synchronisation are presented. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Рационално проектиране на преобразуватели на променлив в постоянен ток Автор: Личев, Роман; Lichev, Roman Дата: 1999 Резюме: Two solutions of ac-dc converters with bi-directional energy conversion for middle and high powers are analysed. Directions for their rational design are given. The benefit of implementing of converters by structure "uncontrollable rectifier- chopper" is determined quantitatively. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Подчинено регулиране на електромехнични системи с еластичност Автор: Йонков, Тодор Стефанов; Yonkov, Todor Stefanov Дата: 1999 Резюме: In the article an approach for a synthesis of regulators for multimass elastic electromechanical systems, that are built up on the basis of the contemporary theory for control has been described. The basis of that approach is the decomposition of the multimass system to different infrasystems that characterize all the inner conditions which ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Автоматично управление на технологичен агрегат за центробежно вакуумно леене на титан и титанови сплави Автор: Бакърджиев, Димитър Христов; Банников, Пьотр Иванович; Бакърджиев, Христо Димитров; Цанков, Дочо Цанков; Bakardzhiev, Hristo Dimitrov; Bakardzhiev, Dimitar Hristov; Tsankov, Docho Tsankov; Банников, Пьотр Иванович; Bannikov, Pyotr Ivanovich Дата: 1999 Резюме: This paper is a research on centrifugal vacuum casting mode of titanium products on orthopaedical purpose. On the basis of analytical dependence when technological and constructional special features are given, are constructed curves which guarantee best smoothness and strength of products. On the basis of these dependencies are defined ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Система за съгласувано движение на двудвигателни ходови механизми Автор: Йорданов, Светослав; Yordanov, Svetoslav; Milenkov, Svetoslav Yordanov; Райнов, Румен Иванов; Raynov, Rumen Ivanov Дата: 1999 Резюме: A system for double-motor crane horizontal movement mechanisms is justified and proposed. It ensures synchronised motion of the two ends of the crane bridge at low speeds. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Регулируемо асинхронно електрозадвижване за двудвигателни кранови ходови механизми Автор: Йорданов, Светослав; Yordanov, Svetoslav; Райнов, Румен Иванов; Миленков, Светослав Йорданов; Milenkov, Svetoslav Yordanov Дата: 1999 Резюме: An adjustable asynchronous drive for crane double-motor horizontal movement mechanisms is proposed. It consists of two galvanic separated thyristor controllers of rotor current and a common speed controller with frequency feedback. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Modelling, optimisation and control of fed-batch fermentation process for amino acid production Автор: Georgiev, Tsanko Pertrov; Георгиев, Цанко Петров Дата: 1999 Резюме: This article deals with an approach to modelling, optimisation and control of class biotechnological processes. Fed-batch fermentation process for L-lysine production is discussed in the article. Based on generalised stoichiometric equations a state space and input-output models of discussed process are presented. The identification problem ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Двусвързано управление на непрекъснат биотехнологичен процес Автор: Стоянов, Стоян Неделчев; Stoyanov, Stoyan Nedelchev Дата: 1999 Резюме: The paper deals with multiple-input-multiple-output (MIMO) control of continuous biotechnological procesess. For the design purposes the nonlinear model of the process is transformed into linear one with interval parameters. Robust state space compensator is designed by the intenal model principle. Simulation studies with the nonlinear model were performed. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Led - based simple low - cost differential fluorimeter Автор: Kostov, Yordan Valchev; Костов, Йорданов Вълчев; Rao, Govind Дата: 1999 Резюме: A device for measurement of fluorescence intensity in solutions is presented. It uses semiconductor emitters and receivers of light. That allowed the development of extremely economical construction. A specific light modulation rejects the ambient light and enhances the sensitivity. The device could be used in biotechnological measurements. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Симулационен анализ на двуензимни биосензори за глюкоза Автор: Нейков, Александър Нейков; Neykov, Alexander Neykov; Костов, Йордан Вълчев; Kostov, Yordan Valchev Дата: 1999 Резюме: A mathematical model of two-enzyme biosensor system with non-linear Michaelis -Menten kinetics for measurement glucose concentration is developed. A mathematical description with differential parabolic equations is worked out. Different biosensor systems are analyzed by digital simulation in vector-matrix form. Computer programms ASCI and ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Йон-селективен електрод за pH с Pd/PdO Автор: Нейков, Александър Нейков Дата: 1999 Резюме: An ion-selective pH-electrode with Pd/PdO is developed and research rezults are presented in this paper. The theory of pH-electrode with Pd/Pd0 is described briefly. The sensor membrane preparation technology by thermal oxidation method is given. The ion-selective pH-electrode is investigated experimentaly. The transfer function and ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Двадесет и пет години факултет „АВТОМАТИКА“ Автор: Гатев, Гео Иванов; Gatev, Geo Ivanov Дата: 1999 Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Метод за определяне на разхода на енергия при възникване и прекратяване на режими на боксуване Автор: Българанов, Любомир Борисов; Balgaranov, Lyubomir Borisov; Минков, Пеню рец. Дата: 2001 Резюме: In this paper is offered a method determining the expenses of electrical power of the motor bound with the skid axle. At often repeted and continuous skidsregimes this expenses increase considerably and bring to decrease of the efficiency of the electrical rolling stock. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Анализ на противоплъзгащите свойства на схеми за резисторно спиране Автор: Българанов, Любомир Борисов; Минков, Пеню рец.; Balgaranov, Lyubomir Borisov Дата: 2001 Резюме: In this paper is analized the anti-sliding quality of the schems for resistor braking. They are used in the electrical rolling stock. Analytical expression is given for calculation the dynamic characteristic of the motor -bond with sliding axle. A dependence for calculation of the hardness of the dynamic, braking characteristic also given. Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие: Automatic constraint propagation in the interval Microsoft Excel solver Автор: Nenov, Ivo P.; Ненов, Иво П.; Владов, Симеон Стоянов рец. Дата: 2003 Резюме: This paper presents a novel technique for implementing constraint propagation over the natural interval extension of a given function, in the context of an interval Branch and Bound algorithm for constrained global Optimization and solution of systems of nonlinear equations. In a manner analogous to the reverse mode of automatic differentiation, ... Библиотека:
TECHNICAL UNIVERSITY - SOFIA

Показване на публикации 701-720 от 853

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