A fuzzy rule-based safety index for landing site risk assessment

Author

Howard, Ayanna ; Seraji, Homayoun

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

Volume

14

fYear

2002

fDate

2002

Firstpage

579

Lastpage

584

Abstract

This paper presents a fuzzy rule-based safety index that quantifies the ease-of-landing a spacecraft on a planetary surface based on sensor-derived measurements of terrain characteristics. These characteristics include, but are not limited to, slope and roughness. The proposed representation of terrain safety incorporates an intuitive, linguistic approach for expressing terrain characteristics that is robust with respect to imprecision and uncertainty in the sensor measurements. The risk assessment methodology is tested and validated with a set of simulated data. These tests demonstrate the capability of the algorithm for perceiving hazards associated with landing on a planetary surface.

Keywords

aerospace control; fuzzy control; knowledge based systems; knowledge representation; safety systems; space vehicles; uncertainty handling; Spacecraft landing; fuzzy rule-based safety index; hazard perception; intuitive linguistic approach; landing site risk assessment; planetary surface landing; roughness measurement; sensor-derived measurements; slope measurement; terrain characteristics measurement; terrain safety; Extraterrestrial measurements; Hazards; Risk management; Robustness; Rough surfaces; Safety; Sensor phenomena and characterization; Space vehicles; Surface roughness; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Automation Congress, 2002 Proceedings of the 5th Biannual World

Print_ISBN

1-889335-18-5

Type

conf

DOI

10.1109/WAC.2002.1049499

Filename

1049499