Abstract: To meet the requirements of high efficiency and high performance on board computing, an on orbit reconfigurable, intelligent and evolvable heterogeneous computing system architecture was proposed based on highly reliable minimum system and intelligent heterogeneous computing unit. Based on the heterogeneous computing system architecture, a reconfigurable FPGA DSP intelligent heterogeneous computing unit is designed and implemented. The heterogeneous computing unit has the function of highly reliable minimum system, high performance FPGA logic and rich DSP multi core resources, and can support up to 4 kinds of FPGA programs and 6 kinds of DSP program reconstruction. It can support the on orbit processing of multi type parameter annotation, time sharing loading to complete different tasks, and can support up to 24 kinds of program combination. Based on the FPGA DSP computing unit, a computing system for on orbit processing of remote sensing images is designed and implemented, which has preprocessing functions such as cloud detection and relative radiation correction, and on orbit processing functions such as ROI extraction based on geographic location, ROI extraction based on target detection and user processing of extracted slice images. In the future, based on this heterogeneous computing system architecture, intelligent heterogeneous computing units with higher performance will be constructed, the number and types of computing units will be flexibly configured, and more advanced space borne intelligent heterogeneous computing systems will be realized.

Key words: on board, reconfigurable, intelligent, heterogeneous, minimum system, computing unit, computing system