Title :
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
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;
Conference_Titel :
Automation Congress, 2002 Proceedings of the 5th Biannual World
Print_ISBN :
1-889335-18-5
DOI :
10.1109/WAC.2002.1049499
