关键词: 固定配平飞行器；滚转制导律；制导精度

Abstract: The magnitude of lift force of reentry vehicles with fixed angle of attack is not controllable. The control of the flight path can only be achieved by rollaxis control action. In order to accurately steer the fixed angle of attack reentry vehicle, a rollingguidance law based on fixed trimmed angle of attack(FTAA) is presented. The FTAA vehicle motion equation with respect to the target placement is established. The physical meaning of the motion equation is analyzed. The basic guidance method of the rollingguidance is put forward. The correctness of the guidance method is proved. The calculation method of the rollingguidance command is also given. The ballistic characteristic of the rollingguidance is analyzed by a mathematical simulation. The simulation result illustrates that, by certain rolling strategy, the rollingguidance law can consume the extra lift, achieving the accurate landingpoint control of the vehicle.

Key words: fixed trimmed attackangle vehicle；rollingguidance；guidance accuracy