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Method for estimating external ballistic flight state of cannonball

A technology of flight state and outer trajectory, which is applied in the direction of radio wave reflection/re-radiation, utilization of re-radiation, measuring devices, etc., can solve the problems of low precision of flight state parameters of outer trajectory, failure to achieve real-time and accuracy requirements, etc. , to achieve the effect of ensuring the calculation amount of the algorithm, improving the accuracy, and improving the measurement accuracy

Pending Publication Date: 2019-08-02
CHINA SHIP DEV & DESIGN CENT
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Problems solved by technology

This technical method makes the accuracy of the obtained external ballistic flight state parameters not high, and it is post-event data processing, which cannot meet the requirements of the guided projectile control system for the real-time and accuracy of the projectile flight state parameters.

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  • Method for estimating external ballistic flight state of cannonball
  • Method for estimating external ballistic flight state of cannonball
  • Method for estimating external ballistic flight state of cannonball

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Embodiment Construction

[0035] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] The invention provides a method for estimating the external ballistic flight state of a shell, comprising:

[0037] Step S1, state parameter estimation and modeling to obtain a state model and a measurement model;

[0038] Step S2, improving the UKF algorithm based on the state model and the measurement model;

[0039] Step S3, based on the state model, the measurement model and the UKF algorithm, the selection of the number of sample points and the estimation of the ballistic flight state of the projectile.

[0040] Here, the projectile external ballistic flight state estimation method of the present invention includes: system modeling, improved filtering algorithm, sample point number selection; described projectile exte...

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Abstract

The invention provides a method for estimating an external ballistic flight state of a cannonball. The method comprises the steps of modeling a system, improving a filtering algorithm and selecting the number of sample points. The improved filtering algorithm is adopted for estimation of external ballistic parameters of the cannonball; a point-mass trajectory equation serves as a state model of the system; and a radar measurement equation serves as a measurement model of the system. The estimation method adopts an improved nonlinear filtering algorithm. According to the method for estimating the external ballistic flight state of the cannonball, a state estimation error can be kept near a certain steady-state range after filtering is started for 5s, so that the convergence effect is good.The estimation method has the advantages that a conventional estimation method is remarkably improved, the measurement precision of external ballistic parameters of a missile rocket is improved, the introduction of a linearization error is avoided under the condition of ensuring the filtering precision and the algorithm calculation amount, and the filtering precision is improved, so that an important basis is provided for performing accurate ballistic control on the cannonball.

Description

technical field [0001] The invention relates to a method for estimating the external ballistic flight state of a cannonball. Background technique [0002] Ballistic measurement data processing is an important part of missile and spacecraft flight test engineering, and it plays an important role in ensuring the completion of missile and spacecraft tests and promoting their technological development. With the continuous improvement of the performance of new weapons and equipment, large range, over-the-horizon, supersonic speed, high precision, and diversification of model tasks, in order to improve the design and estimation accuracy of the firepower system, various statistical filtering methods are used to estimate the The flight state of the firepower system can provide high-precision control input for the missile-loaded known system, thereby improving the shooting accuracy of the shell. [0003] Aiming at the problem of calculating the ballistic parameters outside the fligh...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58G01S7/02
CPCG01S13/589G01S7/021
Inventor 丁传炳杜裴乐陈太宣
Owner CHINA SHIP DEV & DESIGN CENT
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