Flying Qualities Analysis for Re-entry Vehicles: Methodology and Application

Haya-Ramos, Rodrigo; Peñín, Luis F.; Parigini, Cristina; Kerr, Murray; Preaud, Jean-Philippe; Ganet, Martine; Bennani, Samir; Barrio, Álvaro Martínez

doi:10.2514/6.2011-6344

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…( 3) cannot be found in a certain flight conditions, the vehicle is said to be untrimmable. After having assessed the equilibrium points, the static longitudinal stability of the these points is evaluated with ESA-validated equations [15]. They compute the neutral point in order to obtain the static margin.…”

Section: Flying Quality Analyses Toolmentioning

confidence: 99%

Multidisciplinary Modeling for Missionisation of Re-entry Vehicles

Guadagnini¹,

Zaiacomo²

2023

AIAA SCITECH 2023 Forum

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This work is part of the European H2020 ASCenSIon program. In this context, the global objective of this research is the definition and the development of a Mission Analysis and GNC missionisation tool for autonomous re-entry vehicles. Within ASCenSIon, missionisation has two scopes: the first concerns with the optimal adaptation of the solution for a specific mission, the second one addresses to evaluate the mission capabilties of a vehicle by means of Multidisciplinary Design Optimization (MDO). The focus of the paper is on the engineering modeling of the building blocks of the Multidisciplinary Design Analysis (MDA) framework, with the goal of identifying the disciplines and the design parameters needed to obtain robust re-entry trajectories. The design of a re-entry mission is, in fact, a multidisciplinary and complex scenario, which must take into account a broad set of Mission and System requirements. For this reason, an MDA environment with appropriate mathematical models of the problem has been developed to assess the mission performance with respect to the key design parameters. This paper gives an overview of the architecture of the tool, with particular attention on the implementation of the disciplines and their interactions, and presents an overview on MDO methodologies for solving the problem.

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Section: Flying Quality Analyses Toolmentioning

confidence: 99%

Multidisciplinary Modeling for Missionisation of Re-entry Vehicles

Guadagnini¹,

Zaiacomo²

2023

AIAA SCITECH 2023 Forum

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“…• Aerodynamic database estimation (AEDB): this model builds a representative aerodynamic database (drag, lift and pitching moment coefficients) of the re-entry vehicle by interpolating datasets from the knowledge of the slenderness ratio (length divided by the diameter) and the wing aspect ratio of the vehicle (the wing span divided by the mean aerodynamic chord) [7]. • Flying Quality Analysis (FQA): this discipline evaluates the trim and the static longitudinal stability of the vehicle [8]. The FQA provides the stability domain, so-called Angle-of-Attack corridor and assess the thickness of this corridor.…”

Section: Multidisciplinary Architecture Of the Toolmentioning

confidence: 99%

Multidisciplinary Design Optimisation for Missionisation of Re-entry Vehicles: Preliminary Mission Design and Mission Capabilities Evaluation of Winged Re-Entry Vehicles Case Study

Guadagnini,

De Zaiacomo

2023

Papers of ESA GNC-ICATT 2023

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The work presented in this paper is part of the European H2020 ASCenSIon program. In this context, the overall purpose of this research is the definition and development of a Mission Analysis and GNC missionisation tool for autonomous re-entry vehicles. In recent years, space agencies and private firms are investing in reusable spacecraft and launch vehicles to make space access and in-orbit studies more economically and environmentally sustainable. The re-flight capability, requested by a reusable space system, motivates the need for a dedicated missionisation tool. The objective of missionisation is, indeed, the minimization of the tailoring effort during the mission design phase of each flight. One approach, which can address this aim, is to provide solutions for re-entry vehicles that are qualified for multiple missions. For this reason, a crucial step for missionisation is the computation of the set of missions that a vehicle can perform concerning its design parameters. The focus of this paper is on the preliminary mission design and the evaluation of the mission capabilities of a winged re-entry vehicle by means Multidisciplinary Design Optimization (MDO) approach available within the proposed MA and GNC missionisation tool. One of the key challenges in missionizing a re-entry vehicle is the need to balance the trade-offs between a broad set of system and mission requirements and constraints to obtain robust trajectories. The missionisation in this context is, indeed, a complex and challenging task that requires a thorough understanding of the multidisciplinary aspects of the system and mission design. For this reason, the paper reports the Multidisciplinary Design Analysis (MDA) framework with an overview of the set of disciplines embedded in the tool. For this scenario, the disciplines deal with weight, geometry, and aerodynamic estimation, evaluation of the static longitudinal equilibrium and stability, computation of the aerothermal-mechanical domain, and range capability. The disciplines numerically quantify the related performance and assess the feasible space domain concerning the design variables. Then, the MDA problem is exploited by the optimization routine to optimize the design variables while maximizing targeted performance. The MDO is a crucial feature because allows for the simultaneous optimization of multiple design parameters and objectives to ensure the overall performance and feasibility of the re-entry vehicle. By using this technique, the goal is to evaluate different design options to perform trade-off studies and identify the optimal design, especially when a multi-objectives approach is considered and nondominated optimal Pareto solutions are obtained. Within the MDO process, indeed, the solution space domain is explored through the variation of the design parameters. In this research, metamodeling techniques have been adopted to reduce the computational cost. One of the main challenges faced by MDO concerns, indeed, the efficiency in solving the optimization problem due to the relatively expensive evaluation of the MDA. In particular, in this work, the MDA has been integrated with the DEIMOS Space proprietary tool (EDLS/GNC Sizing and Analysis Too) ESAT, which employs Radial Basis Functions (RBFs) to create a surrogate model of the original problem. The metamodel is built by evaluating the MDA in different design points (samples). Consequently, the metamodel predicts the performance at any point of the domain space by interpolating the outputs of the known points. ESAT, then, uses the metamodel to perform the optimization and create performance maps. One of the drawbacks of adopting a surrogate model is given by the flaw in the accuracy of the solution, especially if a large number of design parameters is taken into account and a limited number of sample points is used. To validate the optimization process, the obtained results for the scenario analysed in this paper are compared with the outcomes achieved by solving the original problem with a Multi-Objective Particle Swarm Optimization (MOPSO) algorithm. The solutions are critically discussed both in terms of accuracy and computational time. The results obtained within the case study reported in this paper show that the proposed multidisciplinary tool embedding an MDO process is a powerful tool for enhancing the missionisation of re-entry vehicles. In particular, the MDA-MDO framework is essential for efficiently missionizing re-entry vehicles, providing a solution qualified for multiple missions. The MDO, indeed, handles the trade-offs between several solutions by considering a broad set of mission and system requirements, and it ensures that the final design is optimized across all relevant disciplines.

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“…During the aerodynamic phase, indeed, the first stage is characterised by a low propellant load. The Moment Reference Center was placed at the nozzle base plate, which correspond to [0 0 0] m. The static stability of the trim point is evaluated by means of the static margin [28]:…”

Section: Flying Qualities Analysismentioning

confidence: 99%

Mission Performance Assessment of the Recovery and Vertical Landing of a Reusable Launch Vehicle

Guadagnini,

De Zaiacomo,

Lavagna

2023

Aerospace

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This paper focuses on the mission analysis of the return trajectory of a Vertical Landing Reusable Launch Vehicle, both for Return-to-Launch-Site (RTLS) and DownRange Landing (DRL) recovery strategies. The main objective is to assess the mission performance of propellant-optimal re-entry and landing trajectories from the Main Engine Cut-Off (MECO) while considering propellant budget and peak entry conditions constraints. As a result, performance envelopes and feasibility regions are built to comprehensively assess the required propellant and compare recovery strategies across a broad spectrum of MECO conditions. The results show that the DRL strategy achieves higher efficiency concerning the propellant consumption and a larger robustness regarding the dispersed MECO conditions.

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Flying Qualities Analysis for Re-entry Vehicles: Methodology and Application

Cited by 5 publications

References 2 publications

Multidisciplinary Modeling for Missionisation of Re-entry Vehicles

Multidisciplinary Modeling for Missionisation of Re-entry Vehicles

Multidisciplinary Design Optimisation for Missionisation of Re-entry Vehicles: Preliminary Mission Design and Mission Capabilities Evaluation of Winged Re-Entry Vehicles Case Study

Mission Performance Assessment of the Recovery and Vertical Landing of a Reusable Launch Vehicle

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