Gliding trajectory reduced-order solution changing along with speed based on attack angle and resistance acceleration
A technology of gliding trajectory and speed change, applied in the field of guidance, can solve the problems of long calculation time, large amount of calculation, complex planning of hyperglide trajectory guidance, etc., and achieve the effect of good calculation speed and accuracy, and fast solution
Active Publication Date: 2021-05-28
中国人民解放军96901部队23分队
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Problems solved by technology
[0002] The guidance planning of hyperglide trajectory is complex and requires a large amount of calculation. The traditional numerical solution method for solving differential equations takes a long time to calculate, and it is difficult to meet the requirements of online trajectory planning and guidance fast solution.
Since trajectory planning needs to perform a large number of iterative calculations, analytical solutions are of great value in online trajectory planning. It is difficult to meet the engineering application requirements of online ballistic planning and guidance rapid solution due to the lack of accuracy and accuracy. Therefore, it is necessary to study a reduced-price solution that can quickly solve a large range of three-dimensional maneuvering trajectories and whose accuracy meets the requirements of engineering applications.
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[0079] The technical solutions of the present invention will be further specifically described below in conjunction with specific embodiments.
[0080] 1. The reduced-order solution of the gliding trajectory based on the angle of attack and drag acceleration as the speed changes, characterized in that:
[0081] Include the following steps:
[0082] Step1: Establish the dynamic model of the gliding vehicle with the speed v as the independent variable
[0083] Definition: the initial longitude, latitude and azimuth of the gliding vehicle in the geocentric coordinate system are respectively λ 0 , φ 0 and alpha 0 ;
[0084] Definition: Offset the geocentric coordinate system is to rotate the geocentric coordinate system around the z, y, and x axes by an angle λ 0 , -φ 0 and alpha 0 The resulting coordinate system;
[0085] Definition: The longitude, latitude and heading angle of the gliding vehicle in the offset geocentric coordinate system are λ, φ and ψ respectively;
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The invention belongs to the technical field of guidance, and relates to a gliding trajectory reduced-order solution changing along with speed based on attack angle and resistance acceleration. The invention discloses reduced-order solution of a gliding trajectory along with speed change based on an attack angle and a resistance acceleration. The invention comprises the following steps: establishing a dynamic model of a gliding aircraft; establishing an approximate equation of a dynamical model of the gliding aircraft containing three-dimensional motion; and solving an analytic solution of the primary approximation equation. The attack angle and the resistance acceleration serve as control variables, compared with a traditional method, the precision of the established three-dimensional gliding aircraft dynamics approximation equation is obviously improved, a large-range three-dimensional maneuvering trajectory can be rapidly calculated, and the requirements of missile-borne computer online trajectory planning and guidance rapid calculation in engineering implementation can be met.
Description
technical field [0001] The invention belongs to the technical field of guidance, and in particular relates to a reduced-order solution of a gliding ballistic trajectory changing with speed based on an angle of attack and drag acceleration. Background technique [0002] The guidance planning of hyperglide trajectory is complex and requires a large amount of calculation. The traditional numerical solution method for solving differential equations takes a long time to calculate, and it is difficult to meet the requirements of online trajectory planning and guidance fast solution. Since trajectory planning needs to perform a large number of iterative calculations, analytical solutions are of great value in online trajectory planning, but most of the analytical solutions of gliding trajectory in the prior art deal with the three-dimensional maneuvering trajectory of large-scale lateral motion, due to the computational speed Therefore, it is necessary to study a reduced-price solu...
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Login to View More IPC IPC(8): G06F30/15G06F30/28G06F17/16G06F113/08G06F119/14
CPCG06F30/15G06F30/28G06F17/16G06F2113/08G06F2119/14Y02T90/00
Inventor 朱恒伟廖波江庆平郭胜鹏
Owner 中国人民解放军96901部队23分队