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System issues for Controlled Ecological Life Support Systems.

J N Eisenberg1, C W Pawlowski, D R Maszle

  • 1Department of Mechanical Engineering, University of California, Berkeley 94720, USA.

Life Support & Biosphere Science : International Journal of Earth Space
|April 1, 1995
PubMed
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Controlled Ecological Life Support Systems (CELSS) differ from engineered systems due to biological variability and a focus on survival. Research must address complex dynamics and unique controller designs for effective CELSS operation.

Area of Science:

  • Systems Engineering
  • Ecological Engineering
  • Control Theory

Background:

  • Controlled Ecological Life Support Systems (CELSS) present unique engineering challenges compared to traditional systems.
  • Key distinguishing features include inherent biological variability, limited data, and a closed-loop ecological structure.
  • The primary objective of CELSS is maximizing the probability of crew survival.

Purpose of the Study:

  • To highlight the distinct characteristics of CELSS.
  • To identify the consequences of these characteristics on system dynamics and control.
  • To propose future research directions in systems and control for CELSS.

Main Methods:

  • Analysis of CELSS characteristics: uncertainty, ecological nature, and survival criterion.
Keywords:
NASA Discipline Life Support SystemsNASA Discipline Number 93-10NASA Program NSCORTNon-NASA Center

Related Experiment Videos

  • Identification of resulting system dynamics and control challenges.
  • Review of existing systems and control research areas.

    • Main Results:

    • CELSS exhibit complex dynamics across diverse timescales (milliseconds to months).
    • Mathematical modeling and predictability are significantly challenged by system variability.
    • A unique controller design is necessary to translate survivability requirements into actuator commands.

    Conclusions:

    • Future research in systems and control must adopt an ecological perspective for CELSS.
    • Addressing the unique dynamical characteristics of CELSS is crucial for advancing life support technology.
    • Integrating biological and engineering principles is essential for robust CELSS design.