UDK 621.396.67:629.78
METHODOLOGY OF PRECISION ADJUSTMENT OF SATELLITE ANTENNAS
I. S. Dodorin* [1], N. A. Smirnov [2]
[1] JSC “Information satellite systems” named after academician M. F. Reshetnev” 52, Lenin Str., Jeleznogorsk, Krasnoyarsk region, 662972, Russian Federation [2] Siberian State Aerospace University named after academician M. F. Reshetnev 31, Krasnoyarsky Rabochy Av., Krasnoyarsk, 660014, Russian Federation E-mail: ivans@iss-reshetnev.ru
The article deals with the problems of adjustment of satellite antennas. The analysis of existing methods of positioning reflector and feed in the space to get the best performance of radio antennas is given. A block diagram illustrates the process of adjustment precision satellite antennas. For positioning reflector in the space the mechanism with parallel kinematics is used. The features of this mechanism are briefly outlined. The analysis of the existing methodology and mechanism with parallel kinematics is given. A new method of precision adjustment satellite antennas using CAD system is shown. The analysis of documentation and software mechanism with parallel kinematics, which showed that one of the ways to move this mechanism is the use of the space rotation matrices, is carried out. For these matrices in CAD system kinematic model of the mechanism with parallel kinematics is developed, and this mechanism works in conjunction with all the technological stand, then stand as a model designed in the same system. Further, with the use of CAD system simple move designed kinematic models in space, which results in a rotation matrix are conducted. Also, when using a kinematic model of the stand in the CAD system the change in position of the mechanism with parallel kinematics and reflector, to transfer data to a real technological stand is observed. The obtained displacement data are verified analytically. The results showed that the rotation matrix obtained in CAD system, fully coincide with the rotation matrix obtained by analytical method and can be used to control the mechanism with parallel kinematics in the real technological stand. Precision adjustment technique satellite antennas presented in this paper can not only carry out the movement of reflector antenna, but also allows us to estimate the change in its position in space to move on a real stand, which in turn minimizes the possibility of errors on the technological stage antenna tuning space apparatus.
satellite antenna, reflector, precision adjustment, rotation matrix, the mechanism with parallel kinematics.
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Dodorin Ivan Sergeevich – postgraduate student, Siberian State Aerospace University named after academician M. F. Reshetnev, engineer 1st category of JSC “Information Satellite System” named after academician M. F. Reshetnev”. E-mail: ivans@iss-reshetnev.ru
Smirnov Nikolai Anatol’evich – Dr. Sc., Professor, Head of Department of Technical Mechanics, Siberian State Aerospace University named after academician M. F. Reshetnev. E-mail: smirnov@sibsau.ru
