Online optimal feedback reentry guidance method based on Radau pseudospectral method

A technology of reentry guidance and pseudospectral method, which is applied in the field of online optimal feedback reentry guidance based on Radau pseudospectral method, which can solve the problems of parameter uncertainty and so on.

Inactive Publication Date: 2019-01-25
CENT SOUTH UNIV
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Problems solved by technology

[0006] The present invention provides an online optimal feedback reentry guidance method based on the Radau pseudospectral method, the purpose of which is to solve the reentry guidance of HGVs with complex motion characteristics under the requirements of multiple constraint conditions, parameter uncertainty and autonomous guidance capability question

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  • Online optimal feedback reentry guidance method based on Radau pseudospectral method
  • Online optimal feedback reentry guidance method based on Radau pseudospectral method
  • Online optimal feedback reentry guidance method based on Radau pseudospectral method

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[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0065] The task of HGV re-entry guidance is described as follows: on the premise of not violating certain process constraints, rely on the adjustment of the angle of attack command and roll angle command to guide the HGV from the state at the beginning of the re-entry phase to the re-entry phase and dive The shift point of the segment, and meet the constraints of the shift conditions, and at the same time, it can independently complete the tasks of passing thr...

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Abstract

The invention provides an online optimal feedback reentry guidance method based on a Radau pseudospectral method. The online optimal feedback reentry guidance method comprises the steps of (S1) initialization, (S2) guidance strategy design, (S3) offline trajectory optimization, (S4) guidance method parameter setting (S5) initial descending stage trajectory prediction, (S6) initial descending stageonline trajectory optimization, (S7) guidance command execution, (S8) gliding stage and transition stage trajectory prediction, and (S9) gliding stage and transition stage online trajectory optimization. The online optimal feedback reentry guidance method regards the online trajectory optimization based on the Radau pseudospectral method and a sequential quadratic programming algorithm as a predicted correction process, is a numerical value predicted correction guidance method based on online optimal feedback control, reduces the computational complexity of the online trajectory optimizationproblem by means of the designed guidance strategy, is conductive to acquiring a feasible solution of the online trajectory optimization problem quickly and precisely, further satisfies the real-timeperformance requirements of closed-loop guidance by means of the ideal based on online optimal feedback control, and realizes the high-precision high-robustness online closed-loop feedback autonomousguidance.

Description

technical field [0001] The invention relates to the technical field of hypersonic glide vehicle re-entry guidance, in particular to an online optimal feedback re-entry guidance method based on the Radau pseudospectral method. Background technique [0002] Hypersonic Glide Vehicle (HGV) has the ability to glide unpowered in near space and finally dive to the target to carry out precise strikes. It is an asymmetric killer weapon in the future space-space integrated war. The motion of HGV has the characteristics of fast time-varying, strong coupling and strong nonlinearity, and the re-entry flight time accounts for more than 85% of the whole flight time. HGV relies on its own aerodynamic force to carry out long-term, long-distance unpowered gliding flight without violating various process constraints such as heat flux density, total overload, and dynamic pressure, and being affected by uncertainties in parameters such as atmospheric density and aerodynamic parameters. , until ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/10
CPCG05D1/105
Inventor 罗世彬廖宇新李军
Owner CENT SOUTH UNIV
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