An alternating renewal process to model constellation availability

Teo, Kah How; Tai, Kang; Schena, V.; Simonini, Luca

doi:10.1016/j.asr.2021.06.047

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…Realistically, the failure of a system results in the unavailability of the system. Some models of constellation unavailability have been proposed recently (Wang et al , 2017; Fan et al , 2020; Teo et al , in press) and additional unavailability costs also have to be considered as a part of lifecycle costs. This has as yet not been studied by the current burn-in literature.…”

Section: Discussionmentioning

confidence: 99%

A lifecycle cost model considering both component and system burn-in for operationally unrepairable systems

Teo¹,

Tai

Schena

et al. 2021

IJQRM

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PurposeThis study presents a lifecycle cost model considering multi-level burn-in for operationally unrepairable systems including assembly and warranty costs. A numerical method to obtain system reliability under component replacement during burn-in is also presented with derived error bounds.Design/methodology/approachThe final system reliability after component and system burn-in is obtained and warranty costs are computed. On failure during operation, the system is replaced with another that undergoes an identical burn-in procedure. Cost behaviours for a small and large system are shown in a numerical example.FindingsThere are more cost savings when system burn-in is conducted for a large system whereas a strategy focusing on component burn-in only can also result in cost savings for small systems. In addition, a minimum system burn-in duration is required before cost savings are achieved for these operationally unrepairable systems.Originality/valueThe operationally unrepairable system is a niche class of systems which small satellites fall under and no such study has been conducted before. The authors present a different approach towards the testing of small satellites for a constellation mission.

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Section: Discussionmentioning

confidence: 99%

A lifecycle cost model considering both component and system burn-in for operationally unrepairable systems

Teo¹,

Tai

Schena

et al. 2021

IJQRM

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show abstract

“…Satellite constellation can be replaced as an effective solution to perform complex missions. Although the use of satellite constellation can reduce some complexities and costs in space missions, adopting a suitable method for designing constellation is challenging [1].…”

Section: Introductionmentioning

confidence: 99%

Conceptual Design Process for LEO Satellite Constellations Based on System Engineering Disciplines

Salehi¹,

Fakoor²,

Kosari³

et al. 2022

Computer Modeling in Engineering &Amp; Sciences

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Satellite design process is an interdisciplinary subject in which the need for collaboration among various science and engineering disciplines is evident. Meanwhile, finding an optimal process for conceptual design of a satellite, which can optimize time and cost, is still an important issue. In this paper, based on system engineering approach, an optimal design process is proposed for LEO satellite constellations. In the proposed method, design process, design sequences, and data flow are established. In this regard, the conceptual design process is divided into two levels of mission (or constellation) and system (or satellite) as well as 15 main activities based on the mission profile, previous experiences of the authors, and existing literature. Then, the relationships between these activities have been determined by considering the importance of relationships according to their priority. Finally, these relations are optimized based on design structure matrix (DSM). By utilizing this approach, system design process of a telecommunication satellite constellation in LEO is formulated in conceptual design phase. Performance and capability of the proposed approach in optimal design process of the satellite constellation are investigated by comparing the outcome with existing results in the literature.

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Optimizing nano/micro satellite constellation lifecycle cost based on reliability after acceptance testing

Teo,

Tai,

Schena

et al. 2024

Advances in Space Research

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An alternating renewal process to model constellation availability

Cited by 6 publications

References 35 publications

A lifecycle cost model considering both component and system burn-in for operationally unrepairable systems

A lifecycle cost model considering both component and system burn-in for operationally unrepairable systems

Conceptual Design Process for LEO Satellite Constellations Based on System Engineering Disciplines

Optimizing nano/micro satellite constellation lifecycle cost based on reliability after acceptance testing

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