时变系统地面颤振模拟试验方法研究 postprint

Abstract: Ground flutter simulation test is a novel testing technology for aircraft flutter verification and aneffective supplement to the curent flutter verification test. In the process of actual flight , airerafi's dynamiccharacteristics and loads on the structure are constantly changing , especially for hypersonic vehicle affectedby aerodynamic heating.In this paper , a modeling method of time-varying parameter unsteady aerodynamicmodel is generated by the use of surrogate model.A ground flutter testing method of time-varying systembased on PID controller is established and verified by standard component test. The testing results showsthat the aerodynamic modeling method proposed can accurately obtain the aerodynamic model with time-varying characteristics , and the ground flutter testing method established can effectively respond to thetime-varying characteristics of the flutter system and obtain accurate flutter boundary.