Comparing Formation Methods for Value Models for the NASA Artemis Human Landing System

Eaton, Casey; White, Christopher J.; Mesmer, Bryan

doi:10.2514/6.2021-1155

Cited by 2 publications

(2 citation statements)

References 32 publications

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“…Many versions of a value model for the coffee maker could exist depending on the stakeholder and formation techniques used. Previous research has illustrated the breadth of value models that could be created for different stakeholders [86] or different formation methods [13]. The model formed in this research is used to compare to the GFT and was therefore not extensively detailed or intended to be comprehensive.…”

Section: Bmentioning

confidence: 99%

The Relationship Between Goal-Function Trees and Value Models

Eaton

Mesmer

2023

IEEE Open J. Syst. Eng.

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Systems often inspire the development of new models to manage size and complexity challenges in system development. Engineers should be aware of overlap in the models used for systems engineering of systems as it would be inefficient to reiterate overlapping tasks. The objective of this paper is to identify consistencies between two models that appear to have overlapping tasks: Goal-Function Trees (GFTs) and value models. Both models are perceived to represent information about the system and stakeholder preferences, but have historically used differing processes and language. An analysis of the functional use and terminology for the two models reveals consistencies. The two models are compared in this paper using content analysis of systems engineering academic literature. It is seen that physics-based system representation and stakeholder preference incorporation are often common to both models. A coffee maker is used to illustrate the potential consistencies and overlapping tasks between the models. Extending this simple example, the applicability of the models to space systems is discussed. The findings of this article can be used by systems engineers to improve their efficiency when applying both GFTs and value models.

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Section: Bmentioning

confidence: 99%

The Relationship Between Goal-Function Trees and Value Models

Eaton

Mesmer

2023

IEEE Open J. Syst. Eng.

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“…Projects such as the Russian LUNA 27 lander [3], NASA's Artemis [31] and VIPER [12] programmes, ESA's PRO-SPECT mission [38], JAXA's SLIM [30], the Indian Chandrayaan 3 [16], and China's Chang'e 6 [10] are expected to land on the Moon before the end of the decade. Furthermore, commercial missions by private companies like Astrobotic Technology [33], SpaceX [41], and Blue Origin [11] are also scheduled to land and perform experiments on the lunar surface in the near future. Several of these projects and experiments aim to test and develop in situ resource utilisation (ISRU) technologies, which could allow the utilisation of native lunar material.…”

Section: Introductionmentioning

confidence: 99%

A novel approach to the analytical modelling of an auger conveyor system for lunar regolith transportation

et al. 2022

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Auger-based transportation systems are a promising method to transport lunar regolith for in situ resource utilisation. An analytical model based on terrestrial auger conveyor industry guidelines is used to predict the behaviour and performance parameters of an auger conveyor system under a range of initial conditions. Key aspects of the model have been validated with published experimental data. The proposed model produces more accurate predictions than previous methods and calculates the inclination angle with the best conveying efficiency. The proposed model output flow predictions have on average $$47\%$$ 47 % less deviation from the experimental data mean than previous model predictions, while the predictions for power requirements without considering energy losses present 42.9% and $$59.2\%$$ 59.2 % less deviation than previous predictions. When the losses are considered, the proposed model predictions are 70% and $$86.4\%$$ 86.4 % more accurate than the previous models, which have been found to underestimate the power requirements of this type of conveyors.

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Comparing Formation Methods for Value Models for the NASA Artemis Human Landing System

Cited by 2 publications

References 32 publications

The Relationship Between Goal-Function Trees and Value Models

The Relationship Between Goal-Function Trees and Value Models

A novel approach to the analytical modelling of an auger conveyor system for lunar regolith transportation

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