Abstract: As human aeronautic and aerospace technology continues to prosper and the aerial flight space domain further expands, traditional fixed-shape air vehicles have been confronted with difficulties in satisfying complex missions in cross-domain scenarios. Owing to their flexible and deformable appearance, morphing air vehicles are expected to realize cross-domain intelligent flight, thus emerging as the most subversive strategic development trend and research focus in aeronautic and aerospace fields. This paper primarily reviews the research background and challenges of flexible and deformable cross-domain intelligent flight, proposing a corresponding research framework and mode as well as exploring the scientific issues and state-of-the-art solutions, where key research progress is introduced. The explorations covered in this paper also provide ideas and directions for the study of deformable cross-domain intelligent flight, which has critical scientific significance in promoting the study itself.

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