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  Title: Параметрични трептения в една неавтономна линейна механична система със зъбни предавки  Author: Белниколовски, Борис Гергов; Belankolovski, Boris Gergov; Симеонова, Дешка Митева; Simeonova, Deshka Miteva Date: 2001 Abstract: In this paper the parametric vibrations of one unautonomous linear mechanical system with gears are studied in the neighborhood of the first and second parametric resonance. The obtained equations of motion are being investigated and the conditions of unstability of the system in the first and second approximation are determined. Much ...
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  Title: Управление с диета [ограничаване на разходите] винаги, навсякъде във всичко  Author: Сомлев, Пенко Пенков; Somlev, Penko Penkov Date: 1999 Abstract: This study aims to analyze the state of economical companies in the country and especially the privatized and planned to be privatized ones. The proper causes of their present unattractive state are brought up. The highlights include the areas and the particular activities that needs to be solved with a view of a future growth. The formed ...
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  Title: Синтез на признаци за разпознаване качеството на хранителни продукти  Author: Дамянов, Чавдар Иванов; Damyanov, Chavdar Ivanov; Georgiev, Atanas Stefanov; Георгиев, Атанас Стефанов Date: 1999 Abstract: It is presumed in the paper that the optimal set of character is estimated by Bayes classifier which provides minimization of the classification error. Practical guides on character synthesis and their actual form applicable to the quality recognition of food products are set out.
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  Title: Оценка на грешките при класификацията на плодове и зеленчуци  Author: Дамянов, Чавдар Иванов; Георгиев, Атанас Стефанов; Костадинова, Лена Филипова; Damyanov, Chavdar Ivanov; Georgiev, Atanas Stefanov; Kostadinov, Lena Filipova Date: 1999 Abstract: The analytical subjection's are derived and a characteristic drawn of the major errors estimating the functional suitability and accuracy of recognition in the automatic quality sorting machines for fruits and vegetables.
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  Title: Маркетингова стратегия и рискове при производство на титанови ортопедични консумативи  Author: Бакърджиев, Димитър Христов; Москов, Антоний Тодоров; Минчев, Стоян Динев; Цанков, Дочо Цанков; Tsankov, Docho Tsankov; Minchev, Stoyan Dinev; Moskov, Antonii Tododrov; Bakardzhiev, Dimitar Hristov Date: 1999 Abstract: This paper is a research on strategical and tactical planning stages of titanium orthopaedical parts production. It contains a tnatketing activity analysis, market analysis, segmentation criteria, analysis and evaluation of purchase factors. A competitive comparisons an situation analysis are done too. There is an attempt on evaluation the risk
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  Title: Abstractions and simplification in teaching of distributed measurement systems  Author: Kalchev, Ivan Denchev; Калчев, Иван Денчев Date: 1999 Abstract: A necessary background for clear outlined existing of each science in the so fast changing world is its permanent development in theoretical and applied aspect for solving today's problems and visions in the future. In this respect for the modern sciences still more important role play the theories, that not only generalize and explain the ...
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  Title: Основен курс по електромагнитна съвместимост – състояние и развитие  Author: Лазаров, Атанас Илиев; Lazarov, Atanas Iliev Date: 1999 Abstract: This paper describes the establishment, content and experience with a course in Electromagnetic Compatibility (EMC). An analysis of the course is made and some considerations are given in regard with its further development in lectures, seminars and laboratories. The mile stone of the course development is its confirmation for the undergraduate ...
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  Title: Някои концепционни въпроси на ЕМС измерванията  Author: Лазаров, Атанас Илиев; Lazarov, Atanas Iliev Date: 1999 Abstract: This paper describes the main aspects of EMC measurements namely approach, procedures_ methods and instruments. The problems of metrological assurance are not under consideration here. The EMC measurements are a special class of measurements for acquisition of measuring information concerning the estimation of characteristics of the ...
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  Title: Подход за синтез на системи за управление при критерий минимум разход на енергия  Author: Рабаджийски, Момчил Борисов; Rabadjiski, Momchil Borisov Date: 1999 Abstract: This paper suggests an approach for .quasi optimum control system synthesis with criterion minimization of energy consummation for plants with self regulation. This approach is based on linear approximation of optimal switching curve. A control system structure for quasi optimal control is proposed. The quasi optimal control is compared ...
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  Title: Control techniques in DSP - based step motor drives  Author: Dzhiev, Stancho Nikolov; Джиев, Станчо Николов; Манчев, Станко; Manchev, Stanko Date: 1999 Abstract: 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 ...
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  Title: Изследване на двулентов кръстат пружинен шарнир с приложение в жироскопични уреди за измерване на сила и маса  Author: Цонев, Никола Иванов; Tsonev, Nikola Ivanov Date: 1999 Abstract: 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 ...
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  Title: Ефективност на системите за управление при шум в регулиращите органи  Author: Николов, Емил Костов; Nikolov, Emil Kostov Date: 1999 Abstract: 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.
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  Title: Невронно мрежеви модел на вокалния тракт за целите на психо-физиологичната диагностика на индивида  Author: Гълъбов, Васил Тотев; Galabov, Vasil Totoev Date: 1999 Abstract: 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 ...
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  Title: Анализ на информационната структура на управленски решения  Author: Сапунджиев, Георги Нешев; Sapundzhiev, Georgi Neshev Date: 1999 Abstract: 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.
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  Title: Синхронизирано управление на двудвигателни електромеханични системи  Author: Михов, Михо Рачев; Mihov, Miho Rachev Date: 1999 Abstract: 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.
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  Title: Рационално проектиране на преобразуватели на променлив в постоянен ток  Author: Личев, Роман; Lichev, Roman Date: 1999 Abstract: 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.
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  Title: Подчинено регулиране на електромехнични системи с еластичност  Author: Йонков, Тодор Стефанов; Yonkov, Todor Stefanov Date: 1999 Abstract: 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 ...
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  Title: Автоматично управление на технологичен агрегат за центробежно вакуумно леене на титан и титанови сплави  Author: 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 Date: 1999 Abstract: 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 ...
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  Title: Система за съгласувано движение на двудвигателни ходови механизми  Author: Йорданов, Светослав; Yordanov, Svetoslav; Milenkov, Svetoslav Yordanov; Райнов, Румен Иванов; Raynov, Rumen Ivanov Date: 1999 Abstract: 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.
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  Title: Регулируемо асинхронно електрозадвижване за двудвигателни кранови ходови механизми  Author: Йорданов, Светослав; Yordanov, Svetoslav; Райнов, Румен Иванов; Миленков, Светослав Йорданов; Milenkov, Svetoslav Yordanov Date: 1999 Abstract: 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.

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