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Abstract
Descent & landing (D&L) on small planetary bodies are
scientifically rewarding exploration missions but they are technically
challenging due to the complex and poorly-known environment around those
bodies. The standard guidance synthesis approach considers nominal
conditions and applies optimal control theory to obtain guidance law
gains, followed by intensive verification and validation. In this
article, it is shown that the standard approach may yield gains that are
not optimal once dispersions (and/or other optimality metrics) are
taken into account and a tuning approach is then proposed based on a priori
methodological system assessment. The proposed approach employs
systematic high-fidelity simulations to generate trade-off maps. These
maps can be generated by on ground operators based on the best estimated
conditions and uploaded to the spacecraft as it approaches the target.
The proposed systematic guidance tuning and resulting maps also provide a
valuable understanding of the system dynamics towards the application
of other industry-oriented tools such as structured Η∞ optimisation. It is shown that the proposed tuning enables propellant
consumption reductions of around 40% compared to state-of-practice gain
selections.
Original language | English |
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Pages (from-to) | 44-54 |
Number of pages | 11 |
Journal | Acta Astronautica |
Volume | 158 |
Early online date | 19 Jul 2018 |
DOIs | |
Publication status | Published - 1 May 2019 |
Keywords
- Descent & landing
- Optimal guidance
- Structured H-infinity synthesis
- control
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Dive into the research topics of 'Systematic performance-oriented guidance tuning for descent & landing on small planetary bodies'. Together they form a unique fingerprint.Projects
- 1 Finished
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Robust and Nonlinear Guidance & Control for Landing on Small Bodies
Simplicio, P. V. M. (Principal Investigator) & Marcos, A. (Principal Investigator)
1/04/16 → 1/04/17
Project: Research