2018 AIAA SPACE and Astronautics Forum and Exposition最新文献_第10页

Complete Hydrogen Storage System by ISRU ISRU完整的储氢系统

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5367

P. Schubert

{"title":"Complete Hydrogen Storage System by ISRU","authors":"P. Schubert","doi":"10.2514/6.2018-5367","DOIUrl":"https://doi.org/10.2514/6.2018-5367","url":null,"abstract":"New technologies make it possible to build in space a complete hydrogen storage system using ISRU methods and techniques. Hydrogen can be stored in a solid-state form on the surface atoms of high surface area matrices such as those of porous silicon. Silicon is abundant in regolith and can be purified using a purely mechanical means which results in particulates in the scale range of tens of nanometers. Reagents used to porosify these nano-particles can be regenerated thermally to essentially eliminate the need for resupply from earth. Catalysts are needed to divide dihydrogen gas into atomic hydrogen for solid-state adsorption and to mediate the temperatures and pressures of charge and discharge into ranges easily achievable with simple equipment. Recent research has identified the utility of non-platinum group catalyst materials which are widespread on the moon. Rapid discharge, needed for propulsion, is possible with infra-red illumination at wavelengths which pass through pure silicon but are absorbed by the silicon-hydrogen bond. Such IR emitters can be fabricated by embossing of silica and additive manufacturing of metals. Control and power electronics can be fabricated using a patented process designed for space operations, and built on either silicon or silicon carbide substrates derived from regolith. Bringing these five technologies together for the first time allows a system which can be fed with moderate pressure gaseous hydrogen at moderate temperatures, stored for long durations with minimum loss, then released upon demand across a wide range of controllable rates. Such a system can displace the need for cryogenic hydrogen storage. Being suitable to bottom-up fabrication using only in-space materials makes this a “green” ISRU technology to store hydrogen for fuel cells, rocket engines, and chemical processes.","PeriodicalId":366106,"journal":{"name":"2018 AIAA SPACE and Astronautics Forum and Exposition","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126960713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leveraging Field Programmable Gate Arrays for Trusted Space Cyber Defense 利用现场可编程门阵列进行可信空间网络防御

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5398

N. Cohen, Wayne A. Wheeler, J. Betser, R. Ewart

引用次数: 0

Systems Engineering “V” in a Model-Based Engineering Environment: Is it still relevant? 基于模型的工程环境中的系统工程“V”:它是否仍然相关?

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5326

J. Hatakeyama, D. Seal, D. Farr, S. Haase

引用次数: 6

Next Generation SPACE Cyber for SWaP Constrained Platforms 交换受限平台的下一代空间网络

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5218

Jeffrey L. Janicik

引用次数: 0

Experimental Testing and Validation of Cyber-Physical Coregulation of a CubeSat 立方体卫星网络物理协同调节的实验测试与验证

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5212

Liam A. Kruse, Adam Plowcha, Justin M. Bradley

引用次数: 2

A Sample Collecting and In-situ Analysis CubeSat Robotic Mission to Apophis 前往阿波菲斯的样品采集和原位分析立方体卫星机器人任务

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5230

A. Flores-Abad, A. Choudhuri, J. Holt, Michael Everett

引用次数: 0

Re-entry Dynamics and Control of Pivot Wing Fly Back Boosters 再入动力学和控制的枢轴翼飞回助推器

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5400

Joseph Chai, M. Smart, M. Kearney

{"title":"Re-entry Dynamics and Control of Pivot Wing Fly Back Boosters","authors":"Joseph Chai, M. Smart, M. Kearney","doi":"10.2514/6.2018-5400","DOIUrl":"https://doi.org/10.2514/6.2018-5400","url":null,"abstract":"Reusable first stage boosters have received much attention in recent years due to their potential to decrease the cost of space access. Studies have shown that the economic feasibility of reusable launch systems are driven primarily by their mission turnaround time, which is significantly reduced by horizontal landing at the launch site. Pivot wing fly back boosters have the potential to support routine, fast turnaround missions due to their horizontal landing capability. The success of these boosters hinges on their ability to execute an autonomous re-entry using only tail-based control surfaces. In this paper, we examine the effects of v-tail and conventional tail configurations on the re-entry closed-loop dynamics of this booster type using 6DOF trajectory simulation. Results show that a v-tail configuration is not a feasible choice when using traditional linearised autopilots due to a lack of dedicated yaw damper. Using identical control laws, the conventional tail vehicle was able to provide lateral stability due to its dedicated yaw damper. The conventional tail configuration also exhibited superior longitudinal tracking performance to the v-tail, and proved to be more robust to aerodynamic modelling errors and degraded elevator control authority. A rapid wing deployment strategy was investigated to eliminate the need for control mixing during wing deployment.","PeriodicalId":366106,"journal":{"name":"2018 AIAA SPACE and Astronautics Forum and Exposition","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125473623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

SALSA - A novel Spectrum Analyzer board for LEO Satellite Allocations based on SDR technology SALSA——一种基于SDR技术的低轨卫星分配频谱分析板

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5283

J. Grosshans, M. Buscher, H. Q. Vu, A. Balke, A. Maass, Alexander Lohse

引用次数: 0

Space Operational Art and Design (SOAD) – How to Manage Space Wars 太空作战艺术与设计(SOAD) -如何管理太空战争

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5217

Paul S Szymanski

引用次数: 0

Single-Person Spacecraft Favored for Gateway EVA 网关EVA的单人飞船

2018 AIAA SPACE and Astronautics Forum and Exposition Pub Date : 2018-09-15 DOI: 10.2514/6.2018-5245

B. Griffin, Robert A. Rashford

引用次数: 1