Goal programming based hypersonic flight vehicle re-entry trajectory online optimization method

Abstract

A goal programming based hypersonic flight vehicle re-entry trajectory online optimization method comprises the steps of giving a kinetic model of hypersonic flight vehicle re-entry process, including height, latitude, longitude, course angle and trajectory angle kinetic equations; calculating a re-entry corridor within a speed-height plane, setting an attack angle alpha as a segmented linear function and using two speed values V1and V2 as a segmentation points to obtain the attack angle alpha; respectively designing a longitudinal trajectory and a transverse trajectory. The goal programming based hypersonic flight vehicle re-entry trajectory online optimization method is applicable to online trajectory generation of the hypersonic flight vehicle re-entry process, is feasible and effective for solving the problem of the re-entry trajectory optimization under the condition that a terminal point position is known, can generate a feasible trajectory within short time, meets quick and real-time trajectory optimization, can further make the obtained trajectory to meet all constraint conditions within a certain error accuracy range and ensures trajectory feasibility.

Description

technical field [0001] The present invention relates to one. In particular, it relates to an online optimization method for reentry trajectory of a hypersonic vehicle based on goal planning based on the establishment of a reentry corridor, combined with goal planning and roll inversion logic, to construct a reentry trajectory. Background technique [0002] Hypersonic aircraft is generally defined as an aircraft whose flight speed can reach more than 5 times the speed of sound. This type of aircraft has good aerodynamic performance and large airspace flight capability, so it has very good application prospects in both military and civilian fields, and has gradually become current research hotspot. The re-entry process refers to the process in which a hypersonic vehicle re-enters the atmosphere from outside the Earth's atmosphere and lands at a very fast speed. However, the complex environment and uncertainties bring great challenges to the realization of the re-entry process...

AI Technical Summary

Problems solved by technology

However, these simplification or improvement methods are actually achieved by losing part of the optimality, so the online optimization method of the reentrant trajectory pays more attention to the feasibility of the obtained trajectory rather than the optimality.

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