Ares I First Stage Booster Deceleration System - An Overview

King, Ron; Hengel, John E.; Wolf, Dean

doi:10.2514/6.2009-2984

Cited by 3 publications

(3 citation statements)

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“…Research in reusable launch vehicles has made continuous progress in recent years. As an extension of parachute landing technology, the parachute recovery method was widely studied and applied in various rockets [6][7][8][9]. Although it is a simple, reliable, and economical method, the unpowered descent process makes it difficult to predict the final landing point of the rocket.…”

Section: Introductionmentioning

confidence: 99%

Powered Landing Control of Reusable Rockets Based on Softmax Double DDPG

Zhang

Dong

et al. 2023

Aerospace

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Multi-stage launch vehicles are currently the primary tool for humans to reach extraterrestrial space. The technology of recovering and reusing rockets can effectively shorten rocket launch cycles and reduce space launch costs. With the development of deep representation learning, reinforcement learning (RL) has become a robust learning framework capable of learning complex policies in high-dimensional environments. In this paper, a deep reinforcement learning-based reusable rocket landing control method is proposed. The mathematical process of reusable rocket landing is modelled by considering the aerodynamic drag, thrust, gravitational force, and Earth’s rotation during the landing process. A reward function is designed according to the rewards and penalties derived from mission accomplishment, terminal constraints, and landing performance. Based on this, the Softmax double deep deterministic policy gradient (SD3) deep RL method is applied to build a robust reusable rocket landing control method. In the constructed simulation environment, the proposed method can achieve convergent and robust control results, proving the effectiveness of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Powered Landing Control of Reusable Rockets Based on Softmax Double DDPG

Zhang

Dong

et al. 2023

Aerospace

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“…A tail-first reentry was not as severe as a nose-first reentry due to aerodynamic differences that increased the amount of FS tumbling and exposure to broad-side attitudes where drag was much higher. 9 A statistical summary of some important parameters at max-q is listed in Table 2.…”

Section: Reentry Flight Dynamicsmentioning

confidence: 99%

Ares I-X Separation and Reentry Trajectory Analyses

Tartabini

Starr

2011

AIAA Atmospheric Flight Mechanics Conference

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“…A similar concept of operations was used to extract a "Jumbo Dart" test vehicle from a C-17 during the Ares parachute flight test program. (9) The C-130 is a very common and affordable aircraft for testing from either military or commercial sources. The primary limitation of LVAD is the altitude restriction inherent in having an aircrew in an unpressurized environment.…”

Section: B C-130 Lvad Of Mdtv/cms and Parachute Compartment Drop Tesmentioning

confidence: 99%

Challenges of CPAS Flight Testing

Ray

Morris²

2011

21st AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar

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The Crew Exploration Vehicle Parachute Assembly System (CPAS) is being designed to land the Orion Crew Module (CM) at a safe rate of descent at splashdown via a series of Drogue, Pilot, and Main parachutes. Because Orion is considerably larger and heavier than Apollo, many of the flight test techniques developed during the Apollo program must be modified. The Apollo program had a dedicated C-133 aircraft, which was modified to allow a simple airdrop of "boilerplate" flight test vehicles. However, the CPAS program must use either commercial or military assets with minimal modifications to airframes or procedures. Conceptual envelopes from 2-Degree Of Freedom trajectories are presented for several existing and novel architectures. Ideally, the technique would deliver a representative capsule shape to the desired altitude and dynamic pressure at test initiation. However, compromises must be made on the characteristics of trajectories or the fidelity of test articles to production hardware. Most of the tests to date have used traditional pallet and weight tub or missile-shaped test vehicles. New test vehicles are being designed to better incorporate Orion structural components and deploy parachutes in a more representative fashion. The first attempt to test a capsule-shaped vehicle failed due to unexpected events while setting up the test condition through a series of complex procedures. In order to avoid the loss of another expensive test article which will delay the program, simpler deployment methods are being examined and more positive control of the vehicle will be maintained. Existing challenges include interfacing with parent aircraft, separating test vehicles, achieving test conditions, and landing within limited test ranges. All these challenges must be met within cost and schedule limits. Nomenclature

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Ares I First Stage Booster Deceleration System - An Overview

Cited by 3 publications

References 0 publications

Powered Landing Control of Reusable Rockets Based on Softmax Double DDPG

Powered Landing Control of Reusable Rockets Based on Softmax Double DDPG

Ares I-X Separation and Reentry Trajectory Analyses

Challenges of CPAS Flight Testing

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