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

A technology of hypersonic speed and optimization method, applied in three-dimensional position/channel control and other directions, which can solve problems such as loss of optimality, not optimality, etc.

Active Publication Date: 2015-05-13
TIANJIN UNIV
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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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  • Goal programming based hypersonic flight vehicle re-entry trajectory online optimization method
  • Goal programming based hypersonic flight vehicle re-entry trajectory online optimization method
  • Goal programming based hypersonic flight vehicle re-entry trajectory online optimization method

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Embodiment Construction

[0062] The method for online optimization of hypersonic vehicle re-entry trajectory based on goal planning of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0063] Considering the difficulties in conventional trajectory optimization, including various constraints brought by the complex reentry environment to trajectory optimization, the complex dynamic model structure of the reentry process and the increased difficulty of solving different variables, and the reentry The large number of variables in the trajectory process leads to large-scale optimization problems and extremely low computational efficiency. Combined with the purpose of the flight mission and the rapidity and simplicity requirements of online trajectory optimization, the present invention divides the re-entry model into longitudinal and horizontal models for the situation where the re-entry flight terminal position is known. The trajectory...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/10
Inventor 胡超芳冯昊辛越
Owner TIANJIN UNIV
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