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Related Experiment Videos

How we will go to Mars.

B N Kiforenko1, I Yu Vasil'ev

  • 1Taras Shevchenko Kyiv University, Kyiv, Ukraine. kifor@univ.kiev.ua

Acta Astronautica
|October 14, 2003
PubMed
Summary
This summary is machine-generated.

Ejecting waste from a spacecraft

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Area of Science:

  • Spacecraft engineering
  • Astrodynamics
  • Life support systems

Background:

  • Manned interplanetary missions require significant initial mass, posing challenges for launch and trajectory.
  • Current life support systems (LSS) generate waste that contributes to this mass.
  • Reducing initial spacecraft mass is crucial for enabling long-duration missions, such as to Mars.

Purpose of the Study:

  • To investigate the efficiency of ejecting waste generated by a spacecraft's life support system (LSS).
  • To determine if waste ejection can reduce the initial mass required for a manned interplanetary mission.
  • To assess the feasibility of waste ejection for enabling early manned Mars missions.

Main Methods:

  • Simulation of an optimal control problem for spacecraft maneuver using an impulsive approximation for interplanetary trajectories.

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  • Decomposition of the optimal control problem into hierarchical 'outer' and 'inner' subproblems.
  • Analysis of the problem structure using Pontryagin's Maximum principle.

    • Main Results:

    • Numerical results demonstrate the efficiency of waste ejection for reducing spacecraft initial mass.
    • The study confirms that waste ejection significantly decreases the required initial mass for Earth-Mars transfer trajectories.
    • The findings support the theoretical possibility of early manned Mars missions through waste ejection.

    Conclusions:

    • Waste ejection from the LSS is a viable strategy for reducing spacecraft initial mass.
    • This approach can make early manned Mars missions feasible without necessitating advanced biological LSS.
    • The study provides a theoretical basis for implementing waste ejection systems in future interplanetary spacecraft.