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载人航天着陆场选择与分析 总被引:1,自引:0,他引:1
安振华 《中国空间科学技术》2006,26(4):67-71
根据载人航天的任务和特点,结合对着陆场的要求,从工程应用的角度出发,对中国载人航天着陆场进行了选择论证,并进行了综合分析;其正确性和可行性在多次无人飞行试验和两次载人飞行任务中得到实际考核和验证。 相似文献
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刘海涛 《中国空间科学技术》1989,9(2):32-37,46
本文阐述了环境试验裁剪的概念、发展背景及其必要性;然后,着重对卫星环境模拟试验中的裁剪技术及应注意的问题作了论述。 相似文献
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地球同步卫星的发射轨道的选择 总被引:1,自引:1,他引:0
余梦伦 《中国空间科学技术》1990,10(1):21-27
本文对地球同步卫星的发射轨道作了一些分析。讨论了有关发射点纬度、停泊轨道、非共面发射轨道对发射轨道选择的影响。 相似文献
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Navdeep Sharma Aman Mahajan 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2013
In this paper, the design of an orbital space settlement named Lakshita located at L5 for 10,000 residents having area of 1 × 106 m2 has been proposed, with the aim of fulfilling mining activities and space research in micro – g. All calculations are made in the perspective of a dynamic demography which could lead to the doubling of the population in next 25 years with initial population of 4500. The settlement consists of one residential torus, one agricultural torus, industrial cylinder and two docking cylinders rotating coaxially at 1 rpm. 2.3% of the total volume of settlement is provided for two docking cylinders with 6 docking ports enabling the elastic flow of space traffic, thereby providing continuous loading and unloading of cargo and passengers. Four pressurized sliding cylinders with 5.7 × 105 m3 volume above the down surface area moving along the spokes fulfill the need of adaptation of visitors at half the gravity level of primary settlement volumes, as well provide wobble control. 1.1 × 105 torr of pressure is provided above the down surface area of the residential torus. The power generation of 400 Mw, required for the functional need of Lakshita, will be obtained through SPS located at L4. The 14 h day and 10 h night cycle will be maintained by four mirrors attached on either side from the central cylinder. The walls of the settlement will be made up of three consecutive layers of super adobe, Nextel and Kevler-49 respectively to provide radiation and debris protection. An assortment of various facilities like appropriate distribution and management of water through an intended network of pipelines, accurate management of waste within the settlement has been provided. 相似文献
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结合空地通信系统的设计,简要分析了空地通信链路的特性,介绍了用分集技术改善空地通信链路抗衰落能力的方法。 相似文献
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J.Roshanian Z.Keshavarz 《中国航空学报》2007,20(1):86-96
Different multidisciplinary design optimization (MDO) problems are formulated and compared. Two MDO formulations are applied to a sounding rocket in order to optimize the performance of the rocket. In the MDO of the referred vehicle, three disciplines have been considered,which are trajectory, propulsion and aerodynamics. A special design structure matrix is developed to assist data exchange between disciplines. This design process uses response surface method (RSM) for multidisciplinary optimization of the rocket. The RSM is applied to the design in two categories: the propulsion model and the system level. In the propulsion model, RSM deter-mines an approximate mathematical model of the engine output parameters as a function of design variables. In the system level, RSM fits a surface of objective function versus design variables. In the first MDO problem formulation, two design variables are selected to form propulsion discipline. In the second one, three new design variables from geometry are added and finally, an optimization method is applied to the response surface in the system level in order to find the best result. Application of the first developed multidisciplinary design optimization procedure increased accessible altitude (performance index) of the referred sounding rocket by twenty five percents and the second one twenty nine. 相似文献
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数据的合理性检验与误差分离方法的选择 总被引:2,自引:0,他引:2
制导系统工具误差分离的工作是一个很细致又很严密的工作,为此必定要对测量数据进行检验,并寻找合适的误差分离方法。文中对遥测数据与外测数据提供了合理性检验的方法,并对利用验前信息与不利用验前信息的两类工具误差分离方法进行了比较,确定这两类方法的适用范围。 相似文献