Ascent and Glide Trajectory Optimization for Hypersonic Vehicle

The full path trajectory optimization is a good challenge for high lift-to-drag ratio vehicle due to different constraints for ascent and gliding phases Moreover the linkage between the phases. In the ascent phase, the constraints include path constraints for the states and the terminal constraints for height, flight path angle and angle of attack. The ascent phase divided into three four phases to control the angle of attack profile where the derivative of the angle of attack chosen as the control variable in this phase. Also, the gliding phase constraints include path constraint and terminal constraint. The terminal constraints are the final height, final velocity, and final latitude Moreover during the reentry phase and due to high oscillation in the reentry phase, used a scheme considered all the factors are acting on the flight path angle and suppress the oscillations by regulating the vertical acceleration channel. The derivative of reference angle of attack and Bank angle chose as the control variables in this phase. This paper described ascent and glide optimized trajectory with two different dynamics for each phase and the linkage between its phases for the constraints in each phase.