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Proceedings of the Technical university of Sofia, 1995 -: Recent submissions

Now showing items 801-820 of 853

Title: Класификации и технически реализации на протези за човешки крайници Author: Аврамов, Иван Иванов; Нецова, Лилия Венелинова; Първанова, Цветелина Тодорова; Avramov, Ivan Ivanov; Netsova, Liliya Venelinova; Parvanova, Tsvetelina Todorova Date: 2004 Abstract: Tthe paper is an extension on the engineering discussion on the problems of the artificial limbs thesis. A poly-criterion classification of the prosthesis is included. Some technical peculiarities of typical thesis realizations are presented. Generalizations on the principal problems of this scientific field less known Bulgaria connected ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Основни проблеми при протезиране на човешките крайници Author: Аврамов, Иван Иванов; Първанова, Цветелина Тодорова; Нецова, Лилия Венелинова; Avramov, Ivan Ivanov; Parvanova, Tsvetelina Todorova; Netsova, Liliya Venelinova Date: 2004 Abstract: The subject of the paper is to present the principal engineering problems of the artificial limbs prosthesis. Simplified biomechanical models of the upper and lower limbs as biological objects - standards, were discussed together by models and schemes, including engineering elements. in the conclusion, the new prosthesis tendencies, ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Крачещи роботи чрез съчетано движение на тяло и крак Author: Павлов, Веселин Илиев; Чавдаров, Иван Николов; Вацкичев, Александър; Николов, Валентин Николов; Pavlov, Veselin Iliev; Chavdarov, Ivan Nikolov; Vatskichev, Alexandar; Nikolov, Valentin Nikolov Date: 2004 Abstract: A number of principal approaches to the design of walking robots are known, and robot walk copies in most cases walk of living creatures. Different schemes of robot leg and body design are proposed to eventually attain great mobility and stability in unknown environment. An object of the present study is motion of a four-legged system with ... Library:
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Title: Модернизиране на инженерното обучение по роботика Author: Павлов, Веселин Илиев; Трифонов, Калин Бойков; Заманов, Владимир Божилов; Pavlov, Veselin Iliev; Trifonov, Kalin Boykov Date: 2004 Abstract: The paper discusses the goals, the basic problems and the results obtained due to the grant "Modernization of the engineering education in robotics" in a contract with the World Bank. An accent is put on the opportunities presented by robotics on the modem engineering training since in most developed countries robotics is used in the role ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Basic classes of higway traffic flow models Author: Benova, Bela Oleg; Бенова, Бела Олег Date: 2004 Abstract: This paper enumerates with restricted amount of details the basic classes of traffic flow models and their inventors. Continuum flow, stochastic, viscosity, car-following, traffic impact descriptions of the driver-vehicle-highway unit are treated. Different approaches for fitting a universal mathematical form to various and sometimes ambiguous ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Реализация на фрактален регулатор с дискретна апроксимация Author: Радева, Надежда Радомирова; Radeva, Nadezhda Radomirova Date: 2004 Abstract: In this work is proposing fractional controller realized by rational approximation of irrational function. The aim of this paper is to systemize some methods for discrete ap-proximation using numerical integration and power series expansion (PSE), discrete approximation using numerical integration and continued fraction expression (CFE). ... Library:
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Title: Двусвързана фрактална система за управление Author: Радева, Надежда Радомирова; Radeva, Nadezhda Radomirova Date: 2004 Abstract: Here is proposed a fractional control algorithm of two-variable industrial project. The system is design with this algorithm has high-quality and robust properties. Systemize fractional-approximation algorithm realized by polynomial recursive method, In this paper are shown effective result from simulations which corroborate fractional ... Library:
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Title: Вземане на решения в условие на устойчив компромис Author: Сапунджиев, Георги Нешев Date: 2004 Abstract: In this paper the problem to determine conditions for choice of solution under stable compromise is solved. The case is considered when there is an arbitrary (but not antagonistic) conflict between decision makers with different resources, different interest and common goal. An approach is proposed decompose the set of decision makers in ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Проблеми на идентификацията на аеродинамичните коефициенти на безпилотни летателни апарати Author: Пътев, Николай Йонков; Patev, Nikolay Yonkov Date: 2004 Abstract: Aerodynamics coefficients are nonlinear and non time invariant function of multiple arguments. Their accuracy definitions determine quality automotive control systems of unmanned aerial vehicles. They are considered problems to their identifications and methods of the decision on some from them. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Оптимално управление в надлъжния канал на летателен апарат при външни смущения Author: Маджаров, Анастас Николов; Георгиев, Румен Желязков; Билидеров, Стефан Савов; Madzharov, Anastas Nikolov; Georgiev, Rumen Zhelyazkov; Bilidirov, Stefan Savov Date: 2004 Abstract: Control of the new aircraft vehicle require increase qualification of the pilots, introduce the new aviation electronics and the computer technology as estimate of dynamic flight parameters and control of steedngwheel. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Алгоритми, моделиращи свойствата на атмосферата и гравитационното поле на земята в SIMULINK Author: Георгиев, Румен Желязков; Georgiev, Rumen Zhelyazkov Date: 2004 Abstract: This paper discus implementation of static and dynamic atmosphere models in Simulink environment. Problems for connecting these models in total aircraft flight model analyzing. Library:
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Title: Дистанционен мониторинг и управление на изпитателни пещи Author: Рабаджийски, Момчил Борисов; Дачев, Йордан Иванов; Rabadzhiyski, Momchil Borisov; Dachev, Yordan Ivanov Date: 2004 Abstract: This paper deal with remote control system for test furnaces, which are the main part of the testers for check the rest resource of responsible equipment. We suggest a hierarchic structure of the system which is able to realize different remote process controlling methods and we compare these methods in terms of cost efficiency, complexity ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Comparative analysis of D and ID fractional regulators for the robust control of static plants Author: Benova, Bela Oleg; Бенова, Бела Олег Date: 2004 Abstract: In this paper are given the basic properties and features of the CRONE control. One of the most popular methods for the synthesis of non-integer-order control systems — the approximation by a fractio-rational recursion — is used for the conception of fractional differentiator and integro-differentiator. The dynamic and robust characteristics ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Discrete robust control system with internal model Author: Nikolova, Nina Georgieva Date: 2004 Abstract: The paper presents a proof for the applicability of a method for synthesis of robust internal model control systems. The case of discrete-time systems synthesis is discussed. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Робастна каскадна система за управление с вътрешен модел Author: Николова, Нина Георгиева; Николов, Емил Костов; Nikolova, Nina Georgieva; Nikolov, Emil Kostov Date: 2004 Abstract: In the present article is proposed the structure of a new robust cascade control system with internal model. The new system effectively combines the properties of the .robust system with internal model and robust system with conditional feedback, both well know in the literature. For synthesis of pro-posed system are used the method of a ... Library:
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Title: Сравнителен анализ между някои методи за апроксимация на преходни характеристики Author: Дойчев, Дойчин Йорданов; Doychev, Doychin Yordanov Date: 2004 Abstract: The approximation of the plant's step response is still the most traditional way for plant's dynamics modeling. In the paper some methods for step responses approximation are examined. The aim of this examination is to make some conclusions about using the plant models for controllers tuning. The comparative analysis is based on examples and simulations. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Честотен анализ на линейни непрекъснати интегро – диференциращи системи Author: Карлова, Весела Ангелова; Костов, Костадин Георгиев; Karlova, Vesela Angelova; Kostov, Kostadin Georgiev Date: 2004 Abstract: The paper studies linear continuous Lag-Lead systems in the frequency domain: The relations between some parameters of the frequency responses and the parameters of the system have been established in analytical form. Responses are presented in the different planes depending on the variation of the ratio between the poles and the ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Оптимално по енергия управление на електрически бойлер Author: Наплатаров, Константин Христов; Стоицева, Десислава Руменова; Naplatarov, Konstantin Hristov; Stoitseva, Desislava Rumenova Date: 2004 Abstract: The energy efficiency problem is a question of present interest especially in Bulgaria, which is at the back of the line on this criterion in Europe based on statistics. This article treats the possibilities of achieving electrical power economy in using electrical power boiler, through optimal control. The electrical power boiler, with ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Discrete fractional - order control system Author: Nikolov, Emil Kostov; Николов, Емил Костов Date: 2004 Abstract: In the present article are proposed: structure of a fractional order control system; method for the synthesis of a fractional algorithm of a new class; method for a discretization of the fractional algorithm; it is deducated a finite difference equation suitable for a direct configuration of discrete controllers; it is submitted and solved ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Система за управление на пастьоризатор Author: Ружеков, Георги Томов; Събев, Диан Иванов Date: 2004 Abstract: In this paper was described a pasteurizator, its functions, modes and problems. The control system was based on the Siamtic S7 300 controller. The human machine intetface was realized by the touch panel TP170A. All dialogs are in Bulgarian. The system makes continuous diagnostics over all the valves, sensors and input — output controller ... Library:
TECHNICAL UNIVERSITY - SOFIA