Research on the Factors Influencing the Phase Stability of the Longitudinal Channel of the Elastic Hypersonic Vehicle

With the gradual development of technology, the design concept of slender body and light weight makes the rigidity of the elastic hypersonic vehicle reduce and the flexibility increase, and the elastic bending mode frequency gradually approaches the shear frequency of the control system, which will reduce the stability margin of the system, and when the vehicle is statically unstable, then the aeroelastic coupling problem becomes particularly serious. In this paper, the longitudinal channel of the elastic hypersonic vehicle is taken as an example to explore the factors that affect the phase stability of the system.