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Method for estimating flight attack angle based on dimensionality reduction state observer

A technology of state observer and observer, which is applied in the field of estimating the flight angle of attack of aircraft or missiles, can solve the problem that the flight angle of attack cannot be obtained more accurately, and achieve the effect of providing control quality, simple algorithm, and guaranteed solution accuracy

Active Publication Date: 2021-07-13
北京航天飞腾装备技术有限责任公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical solution of the present invention is to overcome the deficiencies in the prior art, provide a method for estimating the flight angle of attack based on the reduced-dimensional state observer, and solve the problem of whether the missile is equipped with The problem that the flight angle of attack cannot be obtained more accurately in the case of the angle of attack sensor

Method used

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  • Method for estimating flight attack angle based on dimensionality reduction state observer
  • Method for estimating flight attack angle based on dimensionality reduction state observer
  • Method for estimating flight attack angle based on dimensionality reduction state observer

Examples

Experimental program
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Effect test

Embodiment

[0061] A certain missile flies at an altitude of 5500 meters at 0.7464mach (velocity Vel=237.345m / s), its aerodynamic coefficient: aerodynamic and static stability Aerodynamic rudder effect Aerodynamic damping Lift coefficient due to one degree angle of attack One-degree pitch rudder deflection caused lift coefficient (Pneumatic reference area Sref=0.1m 2 , the reference length is Lref=3.50m); the quality characteristics of projectile structure: moment of inertia J z =500Kg / m 2 , mass m=700Kg.

[0062] (1), build a model

[0063] According to the flight state, structural parameters and aerodynamic parameters, the dynamic coefficient of the projectile can be calculated and solved

[0064] a 24 =-19.70, a 25 =-57.75, a 34 =0.8438,a 35 = 0.0905, a 22 =-1.10

[0065] The flight angle of attack and angular rate are the state variables of the longitudinal short-period of the monomer, ignoring the influence of flight speed and gravity on the longitudinal motion, and...

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Abstract

The invention discloses a method for estimating a flight attack angle based on a dimensionality reduction state observer. Most tactical missiles are not provided with attack angle sensors, and the attack angle is a basic input quantity designed by a tactical missile multi-loop control system. The invention provides a method for estimating a flight attack angle based on a dimensionality reduction state observer. The method comprises: dynamic modeling and dimensionality reduction state observer constructing, and is characterized in that the dynamic modeling is that a bivalent state equation is constructed according to a real-time missile flight state and a first-order state observer is constructed on the basis of the bivalent state equation, and observer parameters are determined according to the bandwidth of a state observer, so that the flight attack angle can be estimated. According to the method, the flight attack angle of the missile is estimated based on the dimensionality reduction state observer, so that an algorithm capable of effectively obtaining the flight attack angle of the missile is provided.

Description

technical field [0001] The method relates to a method for estimating the flight angle of attack, which is suitable for estimating the flight angle of attack of an aircraft or a missile. Background technique [0002] When the flight control system can use the flight angle-of-attack information, the control quality can be improved. For missiles, generally, they are not equipped with angle-of-attack sensors, so they cannot accurately obtain angle-of-attack information based on the missile-borne sensors. Therefore, it is necessary to develop a method to estimate the flight angle of attack based on known flight state quantities. Contents of the invention [0003] The technical problem of the present invention is to overcome the deficiencies of the prior art, provide a method for estimating the flight angle of attack based on a dimensionality reduction state observer, and solve the problem that the missile cannot obtain the flight angle of attack more accurately when it is not e...

Claims

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Application Information

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IPC IPC(8): G05D1/10
CPCG05D1/107Y02T90/00
Inventor 王明光李广魏丽霞王晓燕胡海燕苏泽亚宗焕强钟高伟
Owner 北京航天飞腾装备技术有限责任公司
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