Quick trajectory programming method based on smooth glide trajectory analytic solution

An analytical solution and ballistic technology, applied in the fields of aerospace technology and weapons, it can solve the problems of fitting, difficult low-order curve of ballistic trajectory, etc., and achieve the effect of fast speed.

Active Publication Date: 2015-03-04
BEIHANG UNIV
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Problems solved by technology

However, due to the drastic changes in the environment before and after the gliding section

Method used

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  • Quick trajectory programming method based on smooth glide trajectory analytic solution
  • Quick trajectory programming method based on smooth glide trajectory analytic solution
  • Quick trajectory programming method based on smooth glide trajectory analytic solution

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Embodiment example

[0188] In order to test the accuracy of the analytical solution algorithm, CAV is selected as the calculation model, and the numerical simulation effect is carried out. The simulation adopts the non-rotating spherical model and the exponential atmospheric model, and the parameter settings are shown in Table 1. The CPU of the simulation computer is Core i3-2120, the memory is 4GB, and the simulation environment is Matlab.

[0189] Table 1 Simulation parameter settings

[0190]

[0191] First, the accuracy of the analytical solution

[0192] Before ballistic planning, the accuracy of the analytical solution of the ballistic shape is verified first, and compared with the Bell analytical solution. Figure 8 and Figure 9 The comparison of longitudinal ballistic analytical solution and transverse ballistic analytical solution and ballistic integral result is given respectively. It can be seen that the ballistic shape analytical solution and ballistic integral result are almos...

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Abstract

The invention discloses a quick trajectory programming method based on a smooth glide trajectory analytic solution. The quick trajectory programming method based on the smooth glide trajectory analytic solution includes that step 1, modeling glide trajectory programming problems; step 2, designing glide trajectory programming variables; step 3, calculating a glide trajectory analytic solution; step 4, designing a glide trajectory terminal speed control scheme; step 5, designing a glide trajectory re-entry corridor regulating proposal; step 6, generating initial values of glide trajectory programming; step 7, designing a glide trajectory programming flow. The quick trajectory programming method based on the smooth glide trajectory analytic solution uses longitudinal maneuvering acceleration proportion coefficients and transverse maneuvering acceleration proportion coefficients as the glide trajectory programming variables so that differential equations of the trajectory inclination angle, trajectory deflection angle, height, longitude and latitude in motion equations do not comprise a speed item. The quick trajectory programming method based on the smooth glide trajectory analytic solution obtains the glide trajectory analytic solution corresponding to a fixed longitudinal maneuvering acceleration proportion coefficient and a fixed transverse maneuvering acceleration proportion coefficient.

Description

technical field [0001] The invention relates to a fast trajectory planning method based on the analytical solution of a smooth sliding trajectory, and belongs to the fields of aerospace technology and weapon technology. Background technique [0002] With the rapid development of hypersonic technology, reentry trajectory planning has become a research hotspot. The glide segment is the main component of the reentry trajectory, which determines the range and maneuvering range of the reentry flight. The rapid trajectory planning of the glide phase can not only analyze the performance of hypersonic vehicles, but also be used for online trajectory planning and predictive guidance, which has high research value. [0003] Due to the long flight time of the gliding trajectory, it is highly sensitive to the planning variables, and the nonlinear constraints of the reentry process are strong, so the feasible region of the gliding trajectory is narrow, and it often takes a long time to ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈万春胡锦川
Owner BEIHANG UNIV
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