Reentry vehicle trajectory optimization method based on variable-centroid rolling control mode

Abstract

The invention discloses a reentry vehicle trajectory optimization method based on a variable-centroid rolling control mode. The reentry vehicle trajectory optimization method based on the variable-centroid rolling control mode is used for solving the technical problem that the robustness of an existing reentry vehicle trajectory control method is poor. According to the technical scheme, by establishing a one-dimensional variable-centroid rolling control reentry vehicle mathematical model, a one-dimensional variable-centroid rolling control reentry vehicle trajectory optimization model is established, and the one-dimensional variable-centroid rolling control reentry vehicle trajectory optimization model is solved. According to the method, all kinds of constraints in the reentry process of a reentry vehicle are taken into consideration, by introducing control constraints and one-dimensional variable-centroid control ability constraints, the one-dimensional variable-centroid rolling control reentry vehicle trajectory optimization model with a guidance system matched with a control system is established, meanwhile, the trajectory optimization model is solved through a simulated annealing algorithm, and thus the local convergence defect of a classic optimization method is overcome, a nominal trajectory suitable for the one-dimensional variable-centroid rolling control mode is acquired while process constraint and boundary constraint conditions are met, and the robustness of the guidance and control systems is improved.

Description

technical field [0001] The invention relates to a trajectory optimization method for a re-entry vehicle, in particular to a trajectory optimization method for a re-entry vehicle based on a variable center of mass rolling control mode. Background technique [0002] There are three main aerodynamic layouts of aircraft that can realize reentry maneuvers. One is the shape of the cross rudder surface, which can achieve the purpose of changing the magnitude and direction of the control force through three-axis attitude control; Axis control characteristics, by controlling the roll of the reentry vehicle to a certain angle, and controlling the angle of attack to generate appropriate lift, to achieve maneuvering control; the third is the fixed trim angle of attack shape, which has the characteristics of single-axis control, using a single-channel roll control method to achieve reentry control. into the maneuver. Compared with the first two aerodynamic layouts, the aerodynamic shape...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of poor robustness of existing re-entry vehicle trajectory optimization methods,

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