Energy-based Re-entry Trajectory Control

Use energy-based control method to achieve the entry flight control of Reusable Launch Vehicle. The basic concept is to take the energy as primary control variables, reduce the order of the system and design a tracking law to follow a three-dimensional entry trajectory. Feedback linearization is used to design the tracking law. In the new guidance scheme, the flight trajectory restrained by a function of energy is tracked by commanding both the angle of attack and angle of bank. The guidance scheme includes a trajectory planner that generates a feasible flight trajectory and a control law that achieves bounded tracking of the downrange and crossrange distances as functions of energy.In the Terminal Area Energy Management, take advantage of the Energy-Range profile to achieve the flight control of Reusable Launch Vehicle and the energy is also controlled. Put forward the method of onboard generation of TAEM trajectories, the concept of energy corridor. Use the dynamic pressure and velocity to control the energy of the vehicle. At the same time, the altitude and dynamic pressure are also controlled by Kernel Extraction Protocol equations of motion to satisfy the requirements of AutoLanding. Finally, use the multiple delay model and multiple design point approach to achieve the control law design for the energy management phase of a reentry vehicle.