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Terminal guidance method with controllable terminal speed in three-dimensional space

A three-dimensional space, terminal guidance technology, applied in three-dimensional position/channel control, vehicle position/route/altitude control, non-electric variable control, etc. Good robustness, strong engineering application prospects, and the effect of improving solution efficiency

Pending Publication Date: 2021-12-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the complex and multi-constrained terminal guidance segment, especially the ground attack segment of unpowered aircraft, the method of tracking the velocity profile faces the problem of underactuation
Affected by model errors and external disturbances, the method of tracking the velocity profile is difficult to take into account the terminal position and angle constraints

Method used

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  • Terminal guidance method with controllable terminal speed in three-dimensional space
  • Terminal guidance method with controllable terminal speed in three-dimensional space
  • Terminal guidance method with controllable terminal speed in three-dimensional space

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Embodiment Construction

[0063] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with an embodiment and corresponding drawings.

[0064] In order to verify the feasibility of the method, the three-dimensional space guidance law design with controllable terminal velocity is carried out by taking the mission of air-to-ground aircraft striking ground targets as an example. Assuming that the target is a stationary target, the initial position of the aircraft is x 0 =0,y 0 =30km,z 0 = 0, the velocity is v 0 =2000m / s, ballistic inclination angle is θ 0 =0°, the ballistic deflection angle is The terminal requires x f = 80km, y f =z f = 0 and θ f =-90°, v f =750m / s.

[0065] Such as figure 1 As shown, the terminal speed controllable three-dimensional space guidance law design method disclosed in this embodiment, the specific implementation steps are as follows:

[0066] Step 1. On the bas...

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Abstract

The invention discloses a terminal guidance method with controllable terminal speed in a three-dimensional space, and belongs to the field of aircraft guidance and control. The implementation method comprises the steps that terminal speed controllable guidance laws are designed in a longitudinal plane and a lateral plane respectively, wherein the terminal speed controllable guidance laws comprise a longitudinal guidance law and a lateral guidance law; the longitudinal guidance law adopts two-section guidance of 'proportional guidance + offset proportional guidance', and the terminal speed is controlled by controlling the switching time of two sections and an offset term coefficient; the lateral guidance law adopts two-section guidance of 'lateral fly-around and proportional guidance', and the terminal speed is controlled by controlling the time of lateral fly-around; according to the terminal speed controllable guidance laws, attack angle and sideslip angle guidance instructions are output, and then terminal speed controllable terminal guidance of an unpowered aircraft in a three-dimensional space under the multi-constraint condition is achieved. The method further has the advantages of high guidance efficiency and strong robustness.

Description

technical field [0001] The invention relates to a precise terminal guidance method for an aircraft, in particular to a three-dimensional space terminal guidance method with controllable terminal speed, and belongs to the field of aircraft guidance and control. Background technique [0002] Terminal guidance technology is one of the core technologies to ensure that the aircraft hits the target accurately. In order to achieve an effective strike on the target, not only the aircraft is required to accurately hit the target at a fixed angle, but also the aircraft must meet certain speed constraints when hitting the target. Too small terminal speed is not conducive to the terminal penetration and target damage effect, while too large terminal speed can affect the structural safety of the final flight. Therefore, when designing advanced guidance laws, terminal velocity constraints need to be considered. [0003] At present, the guidance law with terminal velocity constraints is ...

Claims

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Application Information

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IPC IPC(8): G05D1/10
CPCG05D1/107Y02T90/00
Inventor 梁子璇冉宇寰崔平远朱圣英徐瑞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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