Nonlinear, Rate-Dependent Evaluation of Flight Damping Derivatives of the Orion Crew Module

Author:

Fagley Casey P.1,Warner Robert M.1,Chmiel Matthew R.1,Yechout Thomas R.1

Affiliation:

1. U.S. Air Force Academy, Air Force Academy, Colorado 80840

Abstract

In the continued development of the Orion crew module, NASA is challenged with characterizing and predicting static and dynamic stability during the atmospheric reentry of the capsule. A thorough understanding of the aerodynamic behavior of the crew module in the subsonic regime is essential for safe return, as this flight regime presents the largest dynamic instability recently demonstrated by the Ascent Abort-2 (AA2) flight test. Forced oscillation wind-tunnel tests were conducted with varying frequency, amplitude, and offset angles to determine the rate-dependent static and dynamic derivatives. A novel data reduction technique was employed to obtain a nonlinear representation of the damping derivatives of the capsule as a function of both its angular position and rate from the aerodynamic force/moment measurements. Finally, a nonlinear, second-order model, two-degree-of-freedom ordinary differential equation was formulated to predict the response of the crew module based on initial angular positions, [Formula: see text] and [Formula: see text], and angular rates, [Formula: see text] and [Formula: see text]. The accuracy of the model was assessed through direct comparisons with the NASA Ascent Abort-2 flight test. Through benchmark comparisons against the AA2 flight-test data and rate-invariant models, the utility of the second-order model was proven, establishing a low-cost, computationally efficient manner of predicting crew module motion and stability that could be leveraged in flight to improve guidance and navigation control algorithms.

Funder

NASA

Publisher

American Institute of Aeronautics and Astronautics (AIAA)

Subject

Space and Planetary Science,Aerospace Engineering

Reference13 articles.

1. HambletonK.RochonL.ThorpeB. “Successful Orion Test Brings NASA Closer to Moon, Mars Missions,” BrownK. (ed.), March 16, 2020, https://www.nasa.gov/press-release/successful-orion-test-brings-nasa-closer-to-moon-mars-missions [retrieved 14 Feb. 2020].

2. HanffE., Direct Forced-Oscillation Techniques for the Determination of Stability Derivatives in Wind Tunnels, AGARD, Lecture Series 114, 1981.

3. Dynamic Wind-Tunnel Testing of a Sixty-Degree Delta-Wing Model Without Support Interference

4. Multi-Degree-of-Freedom Wind-Tunnel Maneuver Rig for Dynamic Simulation and Aerodynamic Model Identification

5. Dynamic test experiment system of single degree of freedom of Φ3.2 m wind tunnel

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3