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A Leaping Re-entry Shooting Pre-bias Lateral Guidance Method

A pre-bias and jump-type technology, applied in the direction of three-dimensional position/course control, etc., to achieve the effect of simple speed and direction deviation funnel, meet the requirements of task adaptability, and improve the level of accuracy

Active Publication Date: 2017-10-24
BEIJING INST OF CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a jump reentry initial reentry section shooting direction adjustment method, which can solve the vertical and horizontal matching problem of the jump reentry aircraft free flight section

Method used

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  • A Leaping Re-entry Shooting Pre-bias Lateral Guidance Method
  • A Leaping Re-entry Shooting Pre-bias Lateral Guidance Method
  • A Leaping Re-entry Shooting Pre-bias Lateral Guidance Method

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Experimental program
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Embodiment

[0033] Such as figure 1 As shown, a jumping reentry shooting pre-bias lateral guidance method, the steps are:

[0034] (1) Calculate the velocity direction V of the aircraft according to the speed coordinates (7800, -500, 700) m / s of the aircraft in the return coordinate system at the 100s moment after the re-entry aircraft calculated by the navigation system Drt ; the formula is as follows

[0035]

[0036]

[0037] Where V is the speed of the aircraft;

[0038] (2) Read in the Kepler range R of the aircraft predicted by the numerical integration method Kep = 3500 km and the velocity of the escape point V S =7100m / s;

[0039] (3) According to the aforementioned Kepler segment voyage R Kep and the velocity of the escape point V S , calculate the estimated flight time t of the Kepler flight segment of the aircraft Kep ; The calculation formula is as follows

[0040] t Kep = K 1 × R Kep / V S +ΔT 1

[0041] =1.01×492+50.0

[0042] =548s

[0043] where K 1 ...

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Abstract

The invention relates to a jump-type reentry shooting pre-bias lateral guidance method, which belongs to the field of aircraft reentry guidance. Compared with the lateral flip boundary adopted by the Shenzhou spacecraft, the velocity direction deviation funnel used in the present invention is simpler, and at the same time, it can better meet the task requirements of controlling the velocity direction in the initial reentry stage of the jump reentry guidance. The present invention can easily realize the pre-compensation of the flight direction in the free flight section by using the calculation method of the shooting offset amount, thereby improving the accuracy level of the lateral guidance method. The invention utilizes the time compensation amount to realize the adjustment and control of the shooting direction and meet the requirement of task adaptability.

Description

technical field [0001] The invention relates to a jump-type reentry shooting pre-bias lateral guidance method, which belongs to the field of aircraft reentry guidance. Background technique [0002] Due to the high reentry speed and large range requirements of the lunar exploration return vehicle, a jump reentry method can be used. Due to the different reentry energy levels, the ballistic characteristics and perturbation influence degree of the initial reentry stage and the second reentry stage (or the descending flight stage after energy damping to the first cosmic velocity) are quite different, so in The high-energy re-entry flight stage needs to use the prediction-correction guidance method to ensure that the initial re-entry will damp the energy of the return device within the appropriate range, and provide a good re-entry initial state for the second re-entry. [0003] The usual lateral guidance method adopts the fixed funnel method, that is, after the aircraft exceeds ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/10
Inventor 杨鸣张钊董文强王勇于丹杨俊春黎藜张维瑾郑永洁张国峰
Owner BEIJING INST OF CONTROL ENG
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