CRAFT: AN EXPERIMENTAL FAULT TOLERANT COMPUTER SYSTEM FOR SERVIS-2 SATELLITE

Space Environment Reliability Verification Integration System (SERVIS) project aims at establishing technologies for high performance and low cost satellite system and components with stateof-the-art commercial parts. New Energy and Industrial Technology Development Organization (NEDO) has entrusted the development of the SERVIS to Institute for Unmanned Space Experiment Free Flyer (USEF). Two verification satellites, SERVIS-1 and -2 will be launched in 2003 and 2006, respectively. CRAFT is an autonomous fault tolerant computer developed as one of the experimental equipment for SERVIS-2 satellite. It incorporates advanced commercial parts and commercial technology in order to realize high performance, small size and light weight component with low cost. CRAFT is being developed in order to built low cost satellite bus system. It will realize high reliability data handling system with high performance and low cost commercial devices by exploiting unique fault tolerant technology, which has higher reliability than majority voting system.