A Reentry Trajectory Planning Based on the Optimization of Angle of Attack

According to the strict aerodynamic heating environment in the reentry process, a new reentry trajectory planning method is presented. A reasonable Heat Flux Rate (HFR) curve is designed with the energy of the aircraft, and the real-time instruction of the Angle of Attack (AOA) is decoded. Then, the flight corridor is planned by the multi-constraint conditions. After that, the flight trajectory could be optimized through applying the pseudo-spectral method. At last, the simulation experiment under Matlab is carried out with an example lifting flight. The results show that the aircraft´s total heat absorption (THA), which got through the new planning method, is smaller than that by the traditional method.