Abstract: Typical aerospace embedded computers have many characters in common,especially in the aspect of the design of computer architecture.Three typical aerospace embedded computers were sampled and their characters of architecture and common technology were analyzed.These samples are flight control computer,guidance control computer and satellite borne computer.Seven characters of architecture were concluded.They are modular,network centric,integration,intensivism,longevity,application of commercial off the shelf(COTS) and system openness.As a result,3 eva-luation dimensions were proposed:common architecture,cost control and development oriented,which contribute to the final score of the system under test directly.All the architecture characters and evaluation dimensionalities mentioned above form the evaluation model for aerospace embedded computers.Each architecture character has a basic guideline and a practical reference value or design.Based on the relationship of the classification of the final evaluation result,the evaluation dimensions and the architecture characters,any aerospace embedded computer can be scored according to the evaluation model for various estimate requirements.The evaluating method and progress were illustrated through two kinds of advanced aerospace embedded computers’ evaluation case.The cases indicate that the evaluation model is clear,effective and practical.

Key words: Evaluation model,Avionic architecture,Aerospace,Embedded computer,Modularization