DYNAMICS OF MECHANICAL SYSTEMS
DYNAMICS OF GYROSCOPIC INCLINOMETER
Yakov Binder, Musalimov Viktor M., Pavel Sergushin, Dmitry A. Sokolov
7
For a down-hole inclinometer, dynamic processes taking place during the instrument foundering are investigated. Governing equations for dynamics of helical-anisotropic body are employed. The torque vibrations are damped with the use of special vanes. The hydrodynamic resistance is estimated on the base of Navier— Stokes equations. Experimental and theoretical data are compared.
ALTERNATIVE CONSTRUCTIONS OF UNIVERSAL SMALL-SIZED GYRO INKLINOMETER
Timofeev Boris P., Dmitry A. Sokolov, Дайнеко В. Ю., Бартош Р. А.
11
Gyroscopic inclinometer with the instrument kinetic moment vector lying in diametrical plane of the device is considered. Design variants of such a down-hole inclinometer allowing for the instrument rotation around both longitudinal and transversal axis are described. The latter property allows for improvement of the inclinometer accuracy and widening the scope of working of the instrument. Special engineering solutions are presented to meet rigid restriction on external diameter of the inclinometer when serially manufactured gyroscope is used in the construction.
DYNAMIC ANALYSIS OF GASKET IN DOWN-HOLE INSTRUMENT
Musalimov Viktor M., Mikhail A. Nozdrin, Родин Н. В.
16
Dependence of the pressure acting on fluoroplastic gasket in down-hole device on working conditions is investigated. An expression for limiting axial loading on a gasket is obtained with the use of Shtribek curve, Reynolds hydrodynamic equation, and Boussinesq problem.
DYNAMIC STABILITY OF TOOTH-BELT GEAR
Беляев А. К.
20
The problem of dynamic stability of tooth-belt gear is investigated analytically. A method is proposed and corresponding equations are presented for derivation of regions of stable translational movement of the tooth-belt. Two regions of unstable rectilinear movement of the belt are recognized: the region of divergent instability and the region of parametric resonance.
FRICTION SELF-OSCILLATIONS IN MECHANICAL SYSTEM
Шамберов В. Н.
24
Accurate analytical method (point mapping) is applied to study a typical one-degree freedom mechanical system in the frames of nonlinear oscillation theory. The result is presented as a partition of the space of system parameters into areas of qualitatively different dynamic behavior.
MECHATRONICS
PIEZOELECTRIC TWO-COORDINATE DEFLECTOR FOR MARKING LASER
Кошкин И. А., Arkady B. Smirnov
29
Performance of a prototype two-coordinate deflector with bimorph actuators is studied experimentally. A method is proposed for eliminate the deflector errors by voltage correction in control system.
EXPLORATION OF A PIEZOELECTRIC GRIP WITH SENSING AND MICRO-POSITIONING
Arkady B. Smirnov, Крушинский И. А.
33
A new piezoelectric gripper is presented. The device operates in a self-sensing mode without any additional sensors, and is able to perform micro-positioning of small details. The micro-positioning and selfsensing functions were examined both theoretically and experimentally. The self-sufficient grip works reliably and safely and is shown to be appropriate for micro assembling.
DIAGNOSTICS AND PRECISION OF MACHINERY AND MECHANISMS
TRENDS OF ERROR MODELING FOR DIAGNOSTIC INSTRUMENTS
Leonid V. Efremov
38
The problem of prediction of error trend of diagnostic instrument from results of cyclic tests is considered. A method is proposed to determine the trend and predict the period of metrological check of the instrument. The method is supposed to give the basis for the instruments quality testing standard.
43
A methodology is developed for construction of systems of nondestructive check of various ball-bearings.
DEFECTS OF OPTICAL FIBER WINDING IN MANUFACTURING OF SENSITIVE ELEMENT
OF FIBER-OPTIC INTERFEROMETER
Meshkovsky Igor K., Kiselev Sergey S., Kulikov Andrey Vladimirovich, Novikov Roman L
47
The problem of manufacturing quality of sensitive elements for fiber-optical interferometers is discussed. A model of quadruple winding of optical fiber is developed accounting for reeling defects. Increment in fiber length due to the defects is calculated.
VISUALIZATION AND IMAGE PROCESSING
MODELING OF AUGMENTED REALITY
Ларин М. С.
52
The problems of modeling of augmented reality are considered. Several difficulties related to image processing and withdrawal of spatial coordinates are addressed.
PROBLEMS OF ESTIMATION OF DYNAMIC ACUITY OF VISION
Воронцов Е. А., Musalimov Viktor M.
57
Theoretical basis is developed for estimation of dynamic visual acuity. The proposed methods and means makes it possible to determine dynamic visual acuity and dynamic perception of space.
REPORTS
TOOTH-WHEEL PUMPS WITH INTERNAL EXTRACENTROIDAL GEARING
Timofeev Boris P., Дайнеко В. Ю.
61
Formulas are presented for shape design of a pair of extracentroidal gears with unit difference in teeth number. Several technological advantages of variation of pin tooth dimensions in such a gearing in gear pumps are demonstrated.
NEW DEVICES AND FACILITIES FOR WORK WITH LUBRICANTS
Kirill N. Voinov, Самойлова Е. В., Черток Е. В.
65
New devices designed for various plastic lubricants testing are presented. The instruments makes it possible to measure the friction coefficient and adhesion characteristics of the lubricant. Construction of a new and very effective ball-pump for liquid materials is described.
FORMATION OF EDUCATIONAL PROCESS ON THE BASE OF A RATE “COMPUTER
CONTROL OF MECHATRONICS SYSTEMS”
George Zamoruev, Mikhail A. Nozdrin, Шаветов А. В.
69
Consideration is given to objectives, contents, and requirements imposed on laboratory practical training in computer control over mechatronic objects.
