Prediction of reliability and cost for environmental control and life support systems

Haibei Jiang, Luis F Rodriguez, Scott Bell, David Kortenkamp, Francisco Capristan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An increasing awareness of life support system reliability has been noticed in the aerospace community as long-term space missions become realistic objectives. However, system reliability requirements are subject to many constraints, particularly the mission cost. This paper presents a coupled analysis of cost and reliability for optimal exploration life support system design. Simulation tools capable of representing complex dynamical systems with configurable uncertainties are utilized for reliability prediction in comparison with the classical reliability prediction approaches. The motivation of this work emerged from the understanding of the conventional reliability prediction approaches and the currently proposed life support system reliability designs for CEV, Lunar Outposts, and other long-term missions. Literature review indicates a significant knowledge gap in the accurate evaluation of the reliability of environmental control and life support systems. Such a gap is believed to result from the unique characteristics associated with ECLSS and other environmental systems. The results presented in this paper consider the difference between reliability prediction results obtained from the traditional approaches and the newly developed method which has been adjusted to address the new challenge. Simulation and statistical analysis are utilized to quantify the impact of buffering capacity, contingency plans, and maintenance strategies on reliability prediction for ECLSS. A brief investigation of the system cost will also be performed to provide preliminary suggestions for balancing system reliability requirements and the associated costs.

Original languageEnglish (US)
Title of host publicationSpace 2008 Conference
StatePublished - Dec 1 2008
EventSpace 2008 Conference - San Diego, CA, United States
Duration: Sep 9 2008Sep 11 2008

Publication series

NameSpace 2008 Conference

Other

OtherSpace 2008 Conference
CountryUnited States
CitySan Diego, CA
Period9/9/089/11/08

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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  • Cite this

    Jiang, H., Rodriguez, L. F., Bell, S., Kortenkamp, D., & Capristan, F. (2008). Prediction of reliability and cost for environmental control and life support systems. In Space 2008 Conference [2008-7818] (Space 2008 Conference).