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25 October 1990, Volume 10 Issue 05 Previous Issue    Next Issue

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ON THE DEVELOPMENT OF MANNED SPACE FLIGHT Wan Xiji (Chinese Academy of Space Technology) 1990, 10 (05):  1-7.  Abstract ( 1823 )   Save This paper gives an introduction to the new trends of mannedspace flight in 90's,and then discusses its great significance in detail.Inconcluding,it points out the importance of setting up our general goal ofmanned space flight. Related Articles | Metrics

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TRANSONIC RELAXATION METHOD APPLIED TO FLOWS AROUND CASCADES Lin Baozhen (Beijing Institute of Satellite Information Engineering) 1990, 10 (05):  8-15.  Abstract ( 1716 )   Save This paper presents an approach that transonic relaxation methodis applied to compution of the flow field around cascades on steady andunsteady flows.On steady flow small disturbance hypothesis in normality ofchord is assumed and on unsteady flow small disturbance hypothesis of line-arized unsteady component is assumed,so that the numerical solution proce-dure is simplified.Because the relaxation method saves computer time andmemory space,it is benefit of wide application in engineeing. Related Articles | Metrics

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ATTITUDE SELECTION OF DUAL SPIN COMMUNICATION SATELLITE Bao Miaoqin Zhou Xianwen (Chinese Academy of Space Technology) 1990, 10 (05):  16-23+30.  Abstract ( 1756 )   Save This paper gives a way to select the optimum attitude of dualspin communication satellite in any operation orbit.Based on the measuredorbit elements and attitude all the parameters needed to flight test could becomputed sapidly by using a microcomputer.According to the additionalrestriction on the selection of the attitude a optimum attitude could becomputed to ensure longer communication duration. Related Articles | Metrics

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RESEARCH ON RANDOM MODEL IN GYRO'S DRIFT TEST Wu Guangyu He Chuanwu Sun Bai (Beijing Institute of Control Engineering) 1990, 10 (05):  24-30.  Abstract ( 1691 )   Save This paper is a preliminary summary for the floated rate integra-tion gyro developed by Beijing Institute of Control Engineering.Its aim is tooffer a random mathematical model of the drift process for the attitudecontrol system of a satellite.This paper analyses gyro's data got in testwith the method of time series analysis.The conclusion is that the randommodel of the gyro can be expressed similar to a first order auto-regressionmodel in general. Related Articles | Metrics

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SPACE ELECTROPHORETIC SEPARATION OF BIOLOGICAL MATERIALS FOR PHARMACEUTICAL PRODUCTION Wu Hanji An Shiming (Center for Space Science and Applied Research,Chinese Academy of Sciences) 1990, 10 (05):  31-38+43.  Abstract ( 1697 )   Save This paper reviews the status of the electrophoretic separationof biological materials,which is an important part of the materials proce-ssing in space,and places emphasis on the goal and content of electrophoreticseparation in space and its history of development. Related Articles | Metrics

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COMPUTER GRAPHICS AND IMAGE PROCESSING Ye Peijian (Chinese Academy of Space Technology) 1990, 10 (05):  39-43.  Abstract ( 1587 )   Save Computer graphics and image processing are independent of butinterdependent each other.This paper focus its attention on the presentation oftheir common and different specialities following a simple introduction aboutcomputer graphics and image processing.Jn addition,we discuss how to profitby the both's interdependent relation so that we can get more favorable helpsin the diverse applications,such as CAD,image restoration,etc. Related Articles | Metrics

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SPACE PHOTOGRAPHY AND ITS APPLICATION IN MAPPING Liu Chengde 1990, 10 (05):  44-50.  Abstract ( 1789 )   Save A Topographic map contains three kinds of information:featureshorizontal and elevation data。According to cartographic requirements,this paper has analysed the specialities of space photogrammetric imagingsystems,photogrammetric practice and efficiency.It is proved that thespace photogrammetric mapping has the advantages of high speed of cove-raging an area,relatively low cost,easy to obtaining topographic details,espe-cially in inaccessible areas;and it can be applied in topographic mappimg at1:50000—1:100000 scales.Space photography and its application is of broadprospect. Related Articles | Metrics

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FROM SOUNDING-7 METEOROLOGICAL ROCKET TO VEGA-3 HIGH ALTITUDE RESEARCH ROCKET——REVIEW THE PAST THIRTY YEARS SINCE THE FIRST SUCCESSFUL LAUNCH OF SOUNDING-7 ROCKET Li Dayao 1990, 10 (05):  51-55.  Abstract ( 2042 )   Save Sounding-7 meteorological rocket,the first chinese practicalsounding rocket,was launched successfully on 13.September 1960.This eventraised the curtain on chinese rocket sounding activities.The chinese rocketsounding cause has gained obvious progress in the past thirty years.Seventeenkinds of sounding rockets were launched.A kind of new rocket,vega-3high altitude research rocket,will launched in the near furture.This paperreviews briefly the history in following four aspects:rocket meteorologicalexploration,rocket biological investigation,rocket atmospherical sampling,rocket special experiment for space science and technology. Related Articles | Metrics

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ALL-FET LOW-NOISE WIDE-BAND MICROWAVE RECEIVER OF C-BAND Sun Daming (Xi'an Institute of Space Radio Engineering) 1990, 10 (05):  56-60+67.  Abstract ( 1883 )   Save This paper describes a scheme of an all-FET C-band low-noisewide-band microwave receiver for use in communication satellite.The recei-ver covers the full spectrum assigned to the satellite communication with about 68.5 dB power gain and noise figure of less than 2.5 dB.To prove the reali-zability of this receiver scheme,several microwave components,such as low-noise amplifiers,band-pass and band-stop filters,FET balanced mixer,gain-compensation circuits etc have been developed.All of the elements and FETdevices used in the experiments are native products.The test results are presentedin this paper too.By means of the advantages which the FETs offered invarious microwave applications,we can realize a microwave receiver with smallsize,light wight,low power consumption and good retransmission performance. Related Articles | Metrics

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APPROACH TO CALCULATE RELIABILITY OF METEOROLOGIC SATELLITE Cheng Zhongxiang (Shanghai Inst.of Spacecraft Engineering) 1990, 10 (05):  61-67.  Abstract ( 1683 )   Save With the rapid development of the space technology,the highreliability of Space products is required.It is very important and complicatedto calculate the reliability of space products.Once the design is determinedthe reliability will be first calculated.Therefore,the calculation of reliabi-lity is defined to be a key link not to be neglected in the development of sa-tellite.This paper provides an approach to calculate reliability of electronicproducts in the satellite,such as meteorologic satellite FY-1. Related Articles | Metrics

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GENERAL STABILITY OF C/E COMPOSITE TRIANGULAR GRID CIRCULAR CONICAL SHELLS Wang Junkui Wang Hu 1990, 10 (05):  68-70+50.  Abstract ( 1657 )   Save In this paper,based on the Donnell-type theory for thin shell,atheoretical analysis is presented for the general stability of C/E compositetriangular grid conical shells under external pressure.The formulas for criticalexternal pressure are obtained by using Galerkin's procedure.Good agreementis shown between the theoretical prediction of critical external pressureand experimental data. Related Articles | Metrics