Abstract: For the application of digital twins in flight tests, the connotation and technical characteristics of digital twins were studied and analyzed. Six flight test digital twins typical application scenarios, such as the requirements development and overall planning of flight test, the flight test mission designing, the integrated testing and modification of flight test, the flight test organization and implementation, the fast maintenance and support and the training of flight test engineers have been designed by mapping the behavior and performance of flight test objects. The synchronize updates, parallel validation and spiral evolution were achieved between the digital models and physical objects during the flight test. The intelligent flight test mode of prediction-flight test-comparison was built. It was an breakthrough in engineering applications of flight test digital twins.

Key words: digital twin technology, flight test, typical application scenario, synchronize updates, parallel validation, intelligent flight test mode