Research on fixed-trim reentry guidance with multiple constraints

Abstract

One of the most cost-effective designs for the maneuvering reentry vehicle is a simple lifting configuration with a fixed angle of attack employing a single roll control system. However, the limited maneuverability due to its uncontrollable magnitude of lifting force leads to the major obstacle to achieve the accurate steering with multiple constraints, so seeking a suitable guidance method is the key to overcome this obstacle. Existing ways are not available to solve this problem. This paper presents a new guidance method, which combined with the Gauss pseudospectral method (GPM) to satisfy the constraints, and the rolling guidance law to track the optimized trajectory accurately. The simulation result illustrates that, this method is effective to realize the precision guidance with multiple constraints for fixed-trim reentry vehicle.

Keywords

• fixed-trim vehicle
• multiple constraints
• gauss pseudospectral method
• rolling guidance law
• standard trajectory