In pace with the speeding process of universe exploration, spacecrafts with better performance and reliability is required.
During the launch process, the strong vibration caused by engine, POGO effect and stage separation may cause damage to the spacecraft structure, therefore it is necessary to conduct vibration test on land to help verify spacecrafts’ adaptability to the environment.
Except for vibration, some environmental factors such as acceleration, humidity and pressure etc. will influence the performance of spacecraft as well, which shows the importance of comprehensive environmental test.
The collection of modal parameters is an important part in the vibration test, which can intuitively reflect the structural characteristics of spacecrafts and further contribute to failure diagnosis and structural optimization.