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25 April 1990, Volume 10 Issue 02 Previous Issue    Next Issue

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CONTROL OF SOLID-APOGEE MOTOR DURING ORBIT TRANSFER MANEUVER Zhang Yuntong (Beijing Institute of Spacecraft System Engineering) 1990, 10 (02):  5-9.  Abstract ( 1591 )   Save This paper provides a method for determining the optimum time and attitude in process of geostationary satellite launch at which the solid-apogee motor to be fired. Related Articles | Metrics

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INTELLIGENCE SYSTEM IN SOME SPACE STATION ACTIVITIES Ye Peijian (Chinese Academy of Space Technology) 1990, 10 (02):  10-15.  Abstract ( 1578 )   Save Autonomy in space station activities requires the intelligences in space system.In combination with the necessary intelligences in materials process in Space station, such as space vision, space robot planning, intelligent sensors, expert systems, etc, this paper proposes the initial thinking of design and technical ways to realize it. Also it gives a proposal for the intelligent computer system in space station. Related Articles | Metrics

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MATRIX METHOD OF ATTITUDE FOR SPIN-STABILIZED GEOSTATIONARY COMMUNICATION SATELLITE Zhou Wenzhong (Beijing Institute of Control Engineering) 1990, 10 (02):  16-24.  Abstract ( 1912 )   Save The matrix method of the attitude determination for spin-stabilized geostationary communication satellite and its cases of practical engineering application are described in this paper. In this matrix method the rotation angle from sun to earth λ_(s(?)) in addition to the earth angle θ_s and sun angle θ_s is simultaneously used for determing spinstabilized geostionary satellite attitude. This method gives uniquely an unambiguous attitude solution simplified the algorithm provides geometric condition where singularity oecures only when the earth and the sun vectors are co-linear and higher accuracy of attitude determination of the satellite. The matrix method was satisfactorily used and verified by the five chinese communication satellite successfully launched. Related Articles | Metrics

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APPLICATION OF SPLIT-PHASE CODE PSK SIGNAL IN DATA TRANSMISSION OF METEOROLOGICAL SATELLITE REMOTE SENSING IMAGE Dai Ying (Shanghai Institute of Spacecraft Engineering) 1990, 10 (02):  25-29+71.  Abstract ( 1951 )   Save In this paper, split-phase code PSK signal is analyzed, its character is reviewed, the basic formation method is briefly described.The application of the signal in digital image transmission of astronautical remote sensing is introduced. And finally, photoes of real-time data transmission are presented. Related Articles | Metrics

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DISCUSSION OF DESIGN PROCEDURE AND SEQUENCE-FOR ENGINEERING SYSTEM Bao Miaoqin Wang Xiji (Chinese Academy of Space Technology) 1990, 10 (02):  30-37.  Abstract ( 1847 )   Save This paper discusses the design procedure and sequence for engineering system from point of view of system engineering.Based on the study of present design sequences, the multi-dimensioncharacteri sties of design procedure have been analysed. Three kinds of idea used in arrangement of design sequence, based on time frame, system composition and design logic, have been induced.And the internal relation and administrative levels among them have been studied.A concept of three-dimension design sequence and a general model used to indicate the order and the phase division about design work are presented.This model can be used as the base to draw up the different design sequences. Related Articles | Metrics

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RELIABILITY OF REDUNDANT DESIGN Guo Weichang (Beijing Institute of Spacecraft System Engineering) 1990, 10 (02):  38-43.  Abstract ( 1852 )   Save This paper deals with the one-sided confidence lower bound of reliability for parallel stand-by, and decision by majority redundant system under the circumstances of two different kinds of prior distribution by use of Bayes theorem. The result is believed to be useful for electric system designer. Related Articles | Metrics

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HIGH-RELIABLE TWT POWER SUPPLY FOR COMMUNICATION SATELLITE He Xianze (Xián Inst. of Space Radio Engineering) 1990, 10 (02):  44-51.  Abstract ( 1560 )   Save The power supply of travelling wave tube amplifier for improved communication satellite DHF-2 (A) is described.The function, design methods and test results of a two-winding storage inductor are introduced in detail. The effects of remained gas and minute particles of vaporized material on TWTA, and the way to avoid them are discussed. Related Articles | Metrics

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APPROXIMATE SOLUTION OF ONE-SIDE LOWER LIMITE FOR SYSTEM AVAILABALITY Wang Ning (Beijing Inst. of Environmental Test Engineering) 1990, 10 (02):  52-58.  Abstract ( 1605 )   Save This paper gives the one-side approximate lower limit of complex system availability by using fitting method, it can be used in reference to evaluate the shortest life of satellite system. Related Articles | Metrics

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ELECTROSTATIC CHARGING AND RADIATION SHIELDING DESIGN PHILOSOPHY FOR GEOSTATIONARY SATELLITE Zhang Yongwei (Beijing Institute of Spacecraft Systems Engineering) 1990, 10 (02):  59-63+69.  Abstract ( 1523 )   Save The methods of total dose shielding and reduction of electrostatic charging effects are described in this paper.The satisfactory on-orbit performance of the spacecraft indicates that total dose mothodology is adequate, and additional improvement in the charging design is warranted Related Articles | Metrics

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THE CALCUTATION OF HEAT PRODUCED BY THE PARTIAL-LINEAR-SEQUENTIAL SHUNT Wang Yuanzheng Shi Juyuan Cao yang (Tianjin INST. of Power Suosources) 1990, 10 (02):  64-69.  Abstract ( 1808 )   Save Accurate calcutation of heat produced by the partial-linear-sequential shunt is the basis of its thermal control design.In present paper the components of heat produced by the current shunt have been analysed and an expression on the relation between heat produced and load power in satellite has been given, finally, heat produced by a typical partiallinear-sequential shunt has been calculated a relation curve between heat produced and load po wer in satellite has been show. Related Articles | Metrics