The Research of Integer Stability When Returning Capsule in Transonic Flight

摘要

Returning capsule's aerodynamic and kinetic characteristic is very important when it is in transonic airspace. Researchers at home and overseas find vibration configuration of limiting loop when they perform subsonic and transonic wind tunnel test on some short-blunt aircrafts such as returning capsules, which brings of aerospace field's attention. This text uses integer stability analysis and digital simulation method to research returning capsule's dynamic stability while it crosses transonic and subsonic airspace, and gets a result similar with wind tunnel test, that is , capsule lies in limiting loop vibration configuration. So, in order to guarantee flying safe, adopting useful and dependable attitude control system to control and lighten the influence of dynamic instability is necessary when returning capsule reentries subsonic and transonic airspace.