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Blended control, predictor-corrector guidance algorithm: an enabling technology for Mars aerocapture.

Roman Y Jits1, Gerald D Walberg

  • 1NASA Ames Research Center, Moffett Field, CA 94035, USA.

Acta Astronautica
|January 27, 2004
PubMed
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This study introduces a guidance scheme to improve aerocapture vehicle control despite atmospheric variations. The new method uses bank angle and angle-of-attack modulation for stable flight and expanded operational limits.

Area of Science:

  • Aerospace Engineering
  • Astrodynamics
  • Guidance, Navigation, and Control

Background:

  • Aerocapture missions require robust guidance systems to handle uncertainties.
  • Vehicle state and atmospheric condition dispersions challenge mission success.

Purpose of the Study:

  • To present a guidance scheme for aerocapture vehicles.
  • To expand the operational envelope of aerocapture by managing dispersions.

Main Methods:

  • Utilizes bank angle and angle-of-attack modulation for vehicle control.
  • Implements a blended control strategy to decouple lateral and vertical motion.
  • Describes the guidance algorithm's macrologic and structure.

Main Results:

Related Experiment Videos

  • Demonstrates effective control under significant state and atmospheric dispersions.
  • Successfully decouples lateral and vertical vehicle dynamics.
  • Validates the guidance algorithm through simulations with off-nominal conditions.

    • Conclusions:

    • The proposed guidance scheme enhances aerocapture robustness.
    • Blended control enables expanded and more reliable aerocapture missions.
    • The algorithm effectively manages uncertainties for successful atmospheric entry.