ASCEND 2020最新文献_第7页

Astronauts: Beyond the Boundaries of Space and Dime 宇航员:超越空间和硬币的边界

ASCEND 2020 Pub Date : 2020-11-02 DOI: 10.2514/6.2020-4179

Christian E. Pezalla

引用次数: 0

2019-2020 AIAA Undergraduate Space Design Competition: Lunar Basecamp 2019-2020年AIAA大学生空间设计竞赛:月球大本营

ASCEND 2020 Pub Date : 2020-11-02 DOI: 10.2514/6.2020-4264

Aerbwong Chitamitara, King Saba, Brandon Delannoy, Bryce Satterfield, Christopher Ligrano, Joshua Barnum, Allan Ramos, N. Nakhjiri, P. Chai

引用次数: 0

Design Considerations for a Mars Highland Helicopter 火星高地直升机的设计考虑

ASCEND 2020 Pub Date : 2020-11-02 DOI: 10.2514/6.2020-4027

L. Young, J. Delaune, W. Johnson, Shannah Withrow, H. Cummings, E. Sklyanskiy, J. Izraelevitz, A. Schutte, A. Fraeman, R. Bhagwat

{"title":"Design Considerations for a Mars Highland Helicopter","authors":"L. Young, J. Delaune, W. Johnson, Shannah Withrow, H. Cummings, E. Sklyanskiy, J. Izraelevitz, A. Schutte, A. Fraeman, R. Bhagwat","doi":"10.2514/6.2020-4027","DOIUrl":"https://doi.org/10.2514/6.2020-4027","url":null,"abstract":"Mars is sharply divided into the relatively low-lying northern hemisphere, filled with plains, to the higher-elevation, rugged, southern hemisphere. All landers sent so far to Mars have only landed on the plains of the northern hemisphere. Access to the Martian Highlands would present an opportunity to acquire unique insights into the early geologic history of Mars. But landing on the Martian highlands presents many engineering challenges. A new approach has recently been proposed to consider the use of mid-air deployment, during the final subsonic stages of entry, descent, and landing, of a small rotorcraft from the aeroshell. The rotorcraft would enter a powered descent state (rotors would be spun to full speed at moderate collectives) after aeroshell release until reaching a modest altitude above the ground where the vehicle would pullout to level flight. After completing this initial EDL mid-air-deployment and landing, the rotorcraft, which would be capable of solarelectric recharging, would recharge over the course of a few days until ready for subsequent flight sorties to explore the highlands. This overall vehicle/mission concept is called the Mars Highland Helicopter. The paper will next demonstrate that a key necessary condition – efficient hover and forward flight under the much thinner atmospheric conditions of the highlands (0.01 kg/m3 vs. 0.015 kg.m3 for the Ingenuity Mars Helicopter Technology Demonstrator at Jezero Crater) – is indeed possible. This paper considers a number of EDL release/deployment strategies to minimize deployment aeroloads and maximize controllability during release from the EDL backshell. This mid-air-deployment discussion will be followed by a general analytical treatment of a Mars rotorcraft entering fullypowered descent and then forward flight cruise. 1 Associate Fellow; Aeromechanics Office, NASA Ames Research Center, Moffett Field, CA 2 Robotics Technologist, NASA Jet Propulsion Laboratory, Pasadena, CA 3 Fellow; Aeromechanics Office, NASA Ames Research Center, Moffett Field, CA 4 Member; Aeromechanics Office, NASA Ames Research Center, Moffett Field, CA 5 Member; Aeromechanics Office, NASA Ames Research Center, Moffett Field, CA 6 NASA Jet Propulsion Laboratory, Pasadena, CA 7 NASA Jet Propulsion Laboratory, Pasadena, CA 8 NASA Jet Propulsion Laboratory, Pasadena, CA 9 NASA Jet Propulsion Laboratory, Pasadena, CA 10 Student intern, Ohio State University, Aeromechanics Office, NASA Ames Research Center, Moffett Field, CA 2 Nomenclature AGL Above ground level AMH Advanced Mars Helicopter CONOPS Concept of operations c Speed of sound, m/s CPL Lower rotor power coefficient CPU Upper rotor power coefficient CTL Lower rotor thrust coefficient CTU Upper rotor thrust coefficient D Aeroshell/capsule diameter, m EDL Entry, Descent, and Landing HIGE Hover in ground effect HOGE Hover out of ground effect MHH Mars Highland Helicopter MSH Mars Science Helicopter MHTD Mars Helicopter Technology Demonstrator, aka “Ingenu","PeriodicalId":153489,"journal":{"name":"ASCEND 2020","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123156918","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: 12

Solar Polar Imager Concept 太阳极地成像仪概念

ASCEND 2020 Pub Date : 2020-11-02 DOI: 10.2514/6.2020-4060

Dan Thomas, Ken-ichiro Kobayashi, Baysinger Mike, Q. Bean, P. Capizzo, K. Clements, L. Fabisinski, J. Garcia, Sutherlin Steve

引用次数: 6

Lunar Water Pilot Plant Conceptual Design 月球水试验厂概念设计

ASCEND 2020 Pub Date : 2020-11-02 DOI: 10.2514/6.2020-4236

D. Linne, J. Kleinhenz, A. Paz

引用次数: 2

Overview of NASA’s Break the Ice Lunar Challenge 美国宇航局“破冰月球挑战”概述

ASCEND 2020 Pub Date : 2020-11-02 DOI: 10.2514/6.2020-4196

M. Roman, N. Vetcha, M. Fiske, P. Carrato, K. Leucht