热门站点| 世界资料网 | 专利资料网 | 世界资料网论坛
收藏本站| 设为首页| 首页

Bridging the gap between high and low acceleration for planetary escape

作者:科技文献资料网 时间:2017-06-27 13:26:17  浏览:9282   来源:科技文献资料网
下载地址: 点击此处下载
[唯一标识符]:CDSITC.AEROSPACE.A93-48442
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:A1993-48442; Reference AN: A93-48442
[标题]:Bridging the gap between high and low acceleration for planetary escape
[作者]:INDRIKIS JANIS; PREBLE JEFFREY C
[来源]:In:-Spaceflight-mechanics-1992;-Proceedings-of-the-2nd-AAS/AIAA-Meeting-Colorado-Springs-CO-Feb. 24-26-1992. Pt. 1-(A93-48426-20-12)
[文摘]:With the exception of the often time consuming analysis by numerical optimization, no single orbit transfer analysis technique exists that can be applied over a wide range of accelerations. Using the simple planetary escape (parabolic trajectory) mission some of the more common techniques are considered as the limiting bastions at the high and the extremely low acceleration regimes. The brachistochrone, the minimum time of flight path, is proposed as the technique to bridge the gap between the high and low acceleration regions, providing a smooth bridge over the entire acceleration spectrum. A smooth and continuous velocity requirement is established for the planetary escape mission. By using these results, it becomes possible to determine the effect of finite accelerations on mission performance and target propulsion and power system designs which are consistent with a desired mission objective. (Author (revised))
[关键词]:ACCELERATION PHYSICS; ESCAPE VELOCITY; FLIGHT PATHS; INTERPLANETARY TRANSFER ORBITS; LOW THRUST PROPULSION; CONTROL THEORY; KEPLER LAWS; PROPULSION SYSTEM PERFORMANCE; TECHNOLOGICAL FORECASTING
[出版年份]:1992
[专业领域]:ASTRONAUTICS GENERAL
下载地址: 点击此处下载
[唯一标识符]:CDSITC.AEROSPACE.A89-47916
[文献来源]:美国航空航天数据库(aerospace);国际航宇文摘(IAA)
[资源原始索取号]:A1989-47916; Reference AN: A89-47916
[标题]:Characteristics of ocean-atmosphere mass-energy transfer (Kharakteristiki masso-energoobmena Mirovogo okeana s atmosferoi)
[作者]:STROKINA L A
[来源]:Meteorologiia i Gidrologiia. June 1989, p. 15 22.
[文摘]:Multiyear mean data on the energy and water balance of the world ocean is presented. The data are based on variations in calculations of turbulent heat and moisture fluxes. Estimates are given for the radiation balance, latent and sensible heat fluxes, the heat transfer between the ocean surface and the underlying oceanic layers and between the ocean and the atmosphere, precipitation, evaporation, and the difference between precipitation and evaporation for each month averaged over oceanic regions of both the Northern and Southern Hemispheres. Also, differences between the components of the energy and water balances of the oceans in the Northern and Southern Hemispheres are evaluated. (R.B.)
[关键词]:AIR WATER INTERACTIONS; ENERGY TRANSFER; MASS TRANSFER; OCEANOGRAPHIC PARAMETERS; ANNUAL VARIATIONS; HEAT BALANCE; WATER BALANCE
[出版年份]:1989
[专业领域]:OCEANOGRAPHY
[馆藏索取号]:A89-47916


[文献类型]:科技报告
[标题]:Glacier Bay National Park and Preserve (Alaska) General Management Plan, September 1984.
[机构]:National Park Service, Washington, DC.
[关键词]:historic preservation,collection,cultural resources,natural resources,glacier bay national park,museums, conservation, guidelines, management, artifacts, storage, archaeology,
[出版年份]:2006
[报告时间]:Sep 1984,
[页码]:110p
[馆藏索取号]:PB2006112441
[总页数]:105



版权声明:所有资料均为作者提供或网友推荐收集整理而来,仅供爱好者学习和研究使用,版权归原作者所有。
如本站内容有侵犯您的合法权益,请和我们取得联系,我们将立即改正或删除。
信息产业部备案号:京ICP备09025792号