On the challenge of a century lifespan satellite

Gonzalo, Jesús; Domínguez, Diego; López, Deibi

doi:10.1016/j.paerosci.2014.05.001

Cited by 14 publications

(4 citation statements)

References 47 publications

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“…As a result, satellite survivability has become an area of interest. Some research efforts focus on the feasibility of extending current lifespans (Gonzalo, Domínguez, & López, 2014), while others seek to optimize the cost structures while maintaining survivability (Khokhlachev, 2011). These research efforts demonstrate the need to promote long-term use of satellites in orbit.…”

Section: Satellite Survivabilitymentioning

confidence: 99%

Satellite Maintenance: An Opportunity to Minimize the Kessler Effect

Mrusek¹

2019

IJAAA

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Section: Satellite Survivabilitymentioning

confidence: 99%

Satellite Maintenance: An Opportunity to Minimize the Kessler Effect

Mrusek¹

2019

IJAAA

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“…Indeed the life span itself is significantly higher than products generally produced in industry, i.e. over 100 years [129]. The technical baseline estimate has already been created based on a work breakdown structure where each task has been assigned to the relevant supply chain units with the request for commitment to a single point estimate they are to provide.…”

Section: State-of-practicementioning

confidence: 99%

Uncertainty quantification metrics for whole product life cycle cost estimates in aerospace innovation

Schwabe

Shehab

Erkoyuncu

2015

Progress in Aerospace Sciences

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a b s t r a c tThe lack of defensible methods for quantifying cost estimate uncertainty over the whole product life cycle of aerospace innovations such as propulsion systems or airframes poses a significant challenge to the creation of accurate and defensible cost estimates. Based on the axiomatic definition of uncertainty as the actual prediction error of the cost estimate, this paper provides a comprehensive overview of metrics used for the uncertainty quantification of cost estimates based on a literature review, an evaluation of publicly funded projects such as part of the CORDIS or Horizon 2020 programs, and an analysis of established approaches used by organizations such NASA, the U.S. Department of Defence, the ESA, and various commercial companies. The metrics are categorized based on their foundational character (foundations), their use in practice (state-of-practice), their availability for practice (state-of-art) and those suggested for future exploration (state-of-future). Insights gained were that a variety of uncertainty quantification metrics exist whose suitability depends on the volatility of available relevant information, as defined by technical and cost readiness level, and the number of whole product life cycle phases the estimate is intended to be valid for. Information volatility and number of whole product life cycle phases can hereby be considered as defining multi-dimensional probability fields admitting various uncertainty quantification metric families with identifiable thresholds for transitioning between them. The key research gaps identified were the lacking guidance grounded in theory for the selection of uncertainty quantification metrics and lacking practical alternatives to metrics based on the Central Limit Theorem. An innovative uncertainty quantification framework consisting of; a set-theory based typology, a data library, a classification system, and a corresponding input-output model are put forward to address this research gap as the basis for future work in this field.

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“…Over long periods, these changes may lead to degradation and eventual component failure in systems including nuclear power reactors 1,2 and space systems. 3,4 Radiationinduced changes may also be used as a forensic tool in either accident scenarios or nuclear security applications to determine the environments to which materials have been exposed. 5 Targeted applications of radiation have been used as nanoscale device processing tools for decades, most notably in the semiconductor industry.…”

Section: Introductionmentioning

confidence: 99%

Listening to Radiation Damage In Situ: Passive and Active Acoustic Techniques

Dennett

Choens

Taylor

et al. 2019

JOM

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Knowing when, why, and how materials evolve, degrade, or fail in radiation environments is pivotal to a wide range of fields from semiconductor processing to advanced nuclear reactor design. A variety of methods, including optical and electron microscopy, mechanical testing, and thermal techniques, have been used in the past to successfully monitor the microstructural and property evolution of materials exposed to extreme radiation environments. Acoustic techniques have also been used in the past for this purpose, although most methodologies have not achieved widespread adoption. However, with an increasing desire to understand microstructure and property evolution in situ, acoustic methods provide a promising pathway to uncover information not accessible to more traditional characterization techniques. This work highlights how two different classes of acoustic techniques may be used to monitor material evolution during in situ ion beam irradiation. The passive listening technique of acoustic emission is demonstrated on two model systems, quartz and palladium, and shown to be a useful tool in identifying the onset of damage events such as microcracking. An active acoustic technique in the form of transient grating spectroscopy is used to indirectly monitor the formation of small defect clusters in copper irradiated with self-ions at high temperature through the evolution of surface acoustic wave speeds. These studies together demonstrate the large potential for using acoustic techniques as in situ diagnostics. Such tools could be used to optimize ion beam processing techniques or identify modes and kinetics of materials degradation in extreme radiation environments.

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On the challenge of a century lifespan satellite

Cited by 14 publications

References 47 publications

Satellite Maintenance: An Opportunity to Minimize the Kessler Effect

Satellite Maintenance: An Opportunity to Minimize the Kessler Effect

Uncertainty quantification metrics for whole product life cycle cost estimates in aerospace innovation

Listening to Radiation Damage In Situ: Passive and Active Acoustic Techniques

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