Fuzzy Image Processing in Sun Sensor

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1853/38644

Title: Fuzzy Image Processing in Sun Sensor
Author: Mobasser, Sohrab ; Liebe, Carl Christian ; Howard, Ayanna M.
Abstract: Sun sensors are widely used in spacecraft attitude determination subsystems to provide a measurement of the sun vector in spacecraft coordinates. At the Jet Propulsion Laboratory, California Institute of Technology, there is an ongoing research activity to utilize Micro Electro Mechanical Systems (MEMS) processes to develop a smaller and lighter sun sensor for space applications. A prototype sun sensor has been designed and constructed. It consists of a piece of silicon coated with a thin layer of chrome, and a layer of gold with hundreds of small pinholes, placed on top of an image detector at a distance of less than a "eter. Images of the sun are formed on the detector when the sun illuminates the assembly. Software algorithms must be able to identify the individual pinholes on the image detector and calculate the angle to the sun. Fuzzy image processing is utilized in this process. This paper will describe how the fuzzy image processing is implemented in the instrument. Comparison of the Fuzzy image processing and a more conventional image pmcessing algorithm is provided and shows that the Fuzzy image processing yields better accuracy then conventional image processing.
Description: Presented at the International Fuzzy Systems Association World Congress, Istanbul, Turkey, June 2003.
Type: Proceedings
Post-print
URI: http://hdl.handle.net/1853/38644
Citation: S. Mobasser, C.C. Liebe, A. Howard, “Fuzzy Image Processing in Sun Sensor,” International Fuzzy Systems Association World Congress, Istanbul, Turkey, June 2003.
Date: 2003-06
Contributor: Jet Propulsion Laboratory (U.S.)
Georgia Institute of Technology. Center for Robotics and Intelligent Machines
Publisher: Georgia Institute of Technology
Subject: Sun sensor
Attitude control
Fuzzy image processing
Fuzzy logic
Image detector
Micro electromechanical systems
Spacecraft

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