Study of ascent optimal trajectory characteristics of air-breathing combined power vehicles
A research is carried out on the ascent optimal trajectory characteristics of the air-breath-ing combined power hypersonic vehicle.Firstly,the vehicle dynamics model was established along with the ascent trajectory optimization model with energy optimization considered.With the rate of angle of attack change chosen as the control input,the optimization model satisfied specific terminal requirements of angle of attack.Then,the ascent trajectory was optimized under different thrust con-ditions by using Radau pseudo spectral method,the optimal trajectory was obtained in different push-drag matching environment through simulation.Finally,in-depth analysis for trajectory charac-teristics was conducted and the optimality of the trajectory was verified.The results show that ascent trajectory presents regular oscillations with varying periods under different thrust conditions.The re-search results can provide a reference for the design of guidance law for the ascent trajectory of air-breathing combined power vehicles.
combined power vehicleascent trajectory optimizationRadau pseudo spectral meth-odtrajectory characteristics analysis
NETL
NSTL
万方数据
