Investigation of the Characteristics of the Three-axis Ring Typed Angular Velocity Transducer Based on Optical Tunneling Effect

The structure of a three-axis ring type angular velocity transducer based on the optical tunnel effect (OTE) is proposed. In this article considered the primary motion, which is excited by the electrostatic means and on the secondary displacements which provide the applied angular velocity information. Keywords: three-axis transducer, angular velocity, optical tunneling effect, ring resonator

Novel Absolute Displacement Sensor with Wide Range Based on Malus Law

The paper presents a novel wide range absolute displacement sensor based on polarized light detection principle. The sensor comprises of two sets of polarized light detecting systems which are coupled by pulleys. The inherent disadvantage in optic system like light source intensity drift is solved and absolute measurement with wide-range is achieved. A prototype and the relevant test bed have been built. The test results are in good agreement with expectation. Its measurement range is 540 mm, and its linearity is better than 0.05%

Electric Conductivity and Gas-Sensing Properties of Nickel Ferrite Thin Films Formed by Ion-Beam Sputtering Deposition

Ferrites with composition of NiMnxFe1-xO4, (with x = 0 ÷ 1.0) have been synthesized by self-propagating high-temperature synthesis (SHS). The particle size of the synthesized ferrite powder was about 10 nm. Additional heat treatment at 1270 K during 50 min allowed us to obtained product with the single phase composition NiFe2O4.  We found out that the increasing of the manganese content (x) increased the lattice constant of the ferrites from 0.833896 nm (x = 0) up to 0.836369 nm (x = 1). The synthesized powder contains two types of ferrite particles that are varied in size and shape. The magnetic properties significantly depend on the microstructure and chemical composition of synthesized ferrites. It has been found that the coercive force Hc increased from 1.75 (x = 0.2) to 2.85 (x = 1). By using of IBSD technology thin film of NiFe2O4 was sputtered on the Si (100) substrate. All sputtered films were X-ray transparent. The structure of ferrite films consisted of agglomerate less than 35 nm. The thickness of the sputtered film was about 600 nm. Additional heat treatment at 770 K during 90 min resulted to homogeneity of the film microstructure. The temperature range 400-750 K corresponds to working temperature range of gas-sensing devices. The ferrite compounds were studied by TOF-SIMS (Time-of-Flight Secondary-Ion-Mass-Spectrometry) for all depth of film. The resistivity R of synthesized film was 39 kΩ. Measurement of gas-sensing sensitivity RCH4/Rair for gas (2%v. CH4) – air mixture showed increase of R up to 12% at the present of methane at 403 K. For further research we plan to replace iron to manganese ions in chemical compounds of ferrite

MULTIMODE INDEPENDENT TURBINE POWER-PLANTS OF SMALL POWER (METHODOLOGICAL FOUNDATIONS, GENERALIZATION OF CHARACTERISTICS, METHODS OF DESIGN AND OPTIMIZATION)

There the study objects are the Independent Power-Plants (IPP) and their members. The purpose is to develop the conception and the principles to create the economical multipurpose, multimode IPP, which were designed for the loads given by the using equipment. The scientific-and-technical, methodological foundations, the systematic approach to the design of IPP on the basis of multimode optimization for the given schedule of loads have been offered. The methods, the application packages and the recommendations to design the multimode turbine IPP with regard to the rigid mass-dimensional restrictions have been developed. The prototypes of multimode power-plants of submarine with 0,2 - 1,8 MW power have been created. The application fields are the stationary and transportable power plant industry, the shipbuilding, the spacecraftAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Providing personnel for enterprises of high-tech industries of the Russian Federation in the field of artificial intelligence

The concept of artificial intelligence from the point of view of regulatory documents is revealed, the main areas of development of this technology are given. The current needs of the industry in highly qualified personnel in the field of artificial intelligence are considered. Technical problems are presented that can be solved with the help of artificial intelligence systems, in particular, with the use of computer vision. A generalized structure of a control system for a moving object using artificial intelligence technologies and a conditional diagram of data processing processes are given on the example of a mobile system that moves along a given trajectory. The main approaches to the training of highly qualified personnel in the field of artificial intelligence systems in leading Russian and foreign universities, as well as in the framework of specialized educational courses, are given. The connection of training in the field of artificial intelligence systems with other applied disciplines is established

Оптимизация балансировочного угла поворота в интомоторной группы электроконвертоплана

The paper examined the possibility of improving the energy efficient performance of an electric tiltrotor with a lift-propulsion propeller group for a steady flight mode by reducing the energy consumption of the propeller group per unit of time or per unit of the path traveled by the electric tiltrotor. This is achieved by selecting the optimal tilting angles of the electric tiltrotor total thrust vector. In the proposed approach, the trimming tilting angle of the propeller group is variable, depending on the aerodynamic characteristics of the electric tiltrotor, its propeller group. Since the propeller group is equipped with the drives for tilting them, this approach is easily implemented by the conventional facilities of the electric tiltrotor. The tilting of the total thrust vector, on the one hand, leads to an increase in the effective value of the aerodynamic lift coefficient and, on the other hand, it is accompanied by a decrease in the projection of the total thrust vector on the flight speed vector, a change in the drag and power required to create the thrust of the propeller group. This circumstance makes it necessary to solve the optimization problem in order to increase the maximum endurance and long-range capabilities in the cruise mode of the electric tiltrotor flight. The paper presents a method for calculating the optimal tilting angles of the total thrust vector based on the equations of steady motion of the electric tiltrotor in the cruise flight mode, the expression for the total power required for the rotation of the propellers of the propeller group. The analytical dependences for the optimal tilting angles of the total thrust vector are obtained depending on the ratio of the wing area to the total propeller-disk area of the propeller group and the aerodynamic quality of the electric tiltrotor.В работе исследовалась возможность улучшения энергоэкономических характеристик электроконвертоплана с подъемно-движительной винтомоторной группой для установившегося самолетного режима полета путем уменьшения расхода энергии винтомоторной группы в единицу времени или на единицу пройденного электроконвертопланом пути. Это достигается за счет выбора оптимальных углов поворота вектора суммарной тяги электроконвертоплана. В предлагаемом подходе балансировочный угол поворота винтомоторной группы является переменным в зависимости от аэродинамических характеристик электроконвертоплана, его винтомоторной группы. Поскольку винтомоторная группа оснащена приводами для ее поворота, то такой подход легко реализуется штатными средствами электроконвертоплана. Поворот вектора суммарной тяги, с одной стороны, приводит к увеличению эффективного значения аэродинамического коэффициента подъемной силой, а с другой стороны, сопровождается уменьшением проекции вектора суммарной тяги на вектор скорости полета, изменением лобового сопротивления, мощности, необходимой для создания тяги винтомоторной группы. Это обстоятельство и обуславливает необходимость решения задачи оптимизации с целью увеличения продолжительности или дальности полета на крейсерском режиме полета электроконвертоплана. В работе приводится методика расчета оптимальных углов поворота вектора суммарной тяги на основании уравнений установившегося движения электроконвертоплана на режиме крейсерского полета; выражения для суммарной мощности, необходимой для вращения винтов винтомоторной группы. Получены аналитические зависимости для оптимальных углов поворота вектора суммарной тяги в зависимости от соотношения площади крыла к суммарной ометаемой площади винтов винтомоторной группы и аэродинамического качества электроконвертоплана