Acquisition Method of Multi-aircraft Threat Degree Based on Pn Guidance Law Identification

An acquisition method, aircraft technology, applied in the direction of instruments, control/regulation systems, non-electric variable control, etc., can solve problems such as aircraft threats

Active Publication Date: 2020-10-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem that there is not yet a method capable of estimating the threat level of intercepting missiles to aircraft, which will cause the aircraft to be greatly threatened.

Method used

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  • Acquisition Method of Multi-aircraft Threat Degree Based on Pn Guidance Law Identification
  • Acquisition Method of Multi-aircraft Threat Degree Based on Pn Guidance Law Identification
  • Acquisition Method of Multi-aircraft Threat Degree Based on Pn Guidance Law Identification

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Comparison scheme
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specific Embodiment approach 1

[0074] The multi-aircraft threat acquisition method based on PN guidance law identification includes the following steps:

[0075] Step 1, establish the relative motion equation of the intercepting missile and the aircraft:

[0076] The group of aircraft is called evaders, and the group of intercepting missiles is called pursuers; there are N intercepting missiles and M aircraft in the scene of pursuers intercepting evaders; intercepting missiles are recorded as P j ,j=1,…,N; the aircraft is recorded as E i ,i=1,...,M; the parameters containing e in the parameter subscript are the parameters corresponding to the aircraft, and the parameters containing p in the parameter subscript are the parameters corresponding to the intercepting missile group;

[0077] For simplicity and clarity, figure 1 The guidance law identification scenario of three interceptor missiles to three aircraft is given; however, this method can be applied to the general situation where N interceptor missil...

specific Embodiment approach 2

[0120] The multi-aircraft threat acquisition method based on PN guidance law identification includes the following steps:

[0121] Step 1, establish the relative motion equation of the intercepting missile and the aircraft:

[0122] The group of aircraft is called evaders, and the group of intercepting missiles is called pursuers; there are N intercepting missiles and M aircraft in the scene of pursuers intercepting evaders; intercepting missiles are recorded as P j ,j=1,…,N; the aircraft is recorded as E i ,i=1,...,M; the parameters containing e in the parameter subscript are the parameters corresponding to the aircraft, and the parameters containing p in the parameter subscript are the parameters corresponding to the intercepting missile group;

[0123] For simplicity and clarity, figure 1 The guidance law identification scenario of three interceptor missiles to three aircraft is given; however, this method can be applied to the general situation where N interceptor missil...

Embodiment

[0175] In order to verify the effectiveness of the method, a simulation experiment is carried out according to the second embodiment through a scene containing 3 evaders and 3 pursuers. Intercept missile P at the initial stage of terminal guidance 1 Interceptor E 1 , the interceptor missile P 2 Interceptor E 2 , the interceptor missile P 3 Interceptor E 3 . Interceptor Missile P 1 The target is not changed throughout the guidance phase; while the interceptor missile P 2 after a while t 2 Then change the target and intercept the aircraft E 1 ;Intercept missile P 3 after a while t 3 Then change the target and intercept the aircraft E 1 . analyzed here at t 2 = 8 seconds and t 3 = Aircraft E in the case of 4 seconds i , i=1,...,3 pairs of interceptor missiles P j , j=1,...,3 state and threat estimation results.

[0176] Suppose the aircraft E i , i=1,...,3 adopt sinusoidal maneuvering mode to move. The maximum maneuverability is 2g. According to the estimated ...

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Abstract

The invention provides a multi-aircraft threat degree acquisition method based on PN guidance law identification, and relates to the field of aircraft anti-interception field, especially an estimationmethod of threat degree when multiple aircrafts are threatened. The multi-aircraft threat degree acquisition method based on PN guidance law identification aims at solving the problem that at present, there is no methods of estimating the threat degree of interceptor missiles to the aircrafts, thus causing the aircrafts to be threatened greatly. The multi-aircraft threat degree acquisition methodbased on PN guidance law identification includes the steps: establishing a relative motion equation of the interceptor missiles and the aircrafts which can obtain the estimated value of the Pj stateof the interceptor missiles, decoupling a Pj motion model into a pitching channel and a yaw channel, wherein the visual inclination angle from the aircrafts to the interceptor missiles is q epsilon<(i,j)> and the drift angle from the aircrafts to the interceptor missiles is q Beta<(i,j)>, performing derivation and according to the estimated value X<^><(i,j)>, calculating the estimated value; performing derivation on q<.> epsilon<(i,j)> and q<.> Beta<(i,j)>, and according to the estimated value X<^><(i,j)>, calculating the estimated value; and defining Xi<(i,j)>= q<.><(i,j)> q<..><(i,j)> as a visual angular velocity convergence index, and calculating the normalization factor so as to obtain the threat degree of the pitching channel and the yaw channel and the three-dimensional interceptionthreat degree. The multi-aircraft threat degree acquisition method based on PN guidance law identification is suitable for calculating the threat degree that the aircrafts bear.

Description

technical field [0001] The invention relates to the field of aircraft anti-interception, in particular to a method for estimating the degree of threat to which multiple aircraft are threatened. Background technique [0002] During the flight, the aircraft will encounter interception missiles. In order to avoid being intercepted, the aircraft often adopts the form of bait to accompany the flight, forming a situation of multiple aircraft flying in a network. In response to this situation, the enemy's interceptor missiles use multiple interceptor missiles to intercept. [0003] In order to effectively evade interception, the aircraft and the accompanying decoy need to estimate the motion state of the intercepting missile, such as the relative position, relative velocity, acceleration of the intercepting missile and information related to its guidance law. Use this information to determine your own escape strategy. [0004] Only when the aircraft can judge the threat level of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/10F41H11/02
CPCF41H11/02G05D1/107
Inventor 邹昕光周荻周成宝
Owner HARBIN INST OF TECH
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