Method for evaluating guidance precision of full-strapdown guided weapon

Abstract

The invention discloses a full-strapdown guided weapon guidance precision evaluation method, and mainly solves the defects of a current full-strapdown guided weapon error precision evaluation method, that is, high-order terms in errors cannot be completely identified during error separation of a full-strapdown guided weapon guidance tool. During error separation of a guidance method, aerodynamic force deviation and thrust deviation cannot be distinguished, so that the adaptability of a precision evaluation method is insufficient. Therefore, in order to improve the adaptive capacity of the algorithm and meet the requirement of a high-precision strike task, the relation between the speed deviation at the shutdown moment of the active section and the error coefficient of the guidance tool is deduced according to the differential-derivative relation between the error coefficient of the guidance tool and the transverse-longitudinal deviation, and the speed deviation at the shutdown moment of the active section is calculated by introducing the swing angle of an engine jet pipe and the indoor pressure of an engine. Thrust deviation and aerodynamic deviation are separated, a bidirectional filtering method is adopted, and guidance method errors are solved in a rapid iteration mode.

Description

technical field [0001] The invention belongs to the technical field of guidance, and in particular relates to a guidance precision evaluation method. Background technique [0002] The main research idea of ​​the refined guidance degree evaluation technology of strapdown guided weapons is the system identification method of separating various error coefficients by remote external measurement residuals. For all strapdown guided weapons, the telemetry angular velocity measured by the guidance tool error contains the tool error and cannot be directly used to construct a mathematical platform to complete the navigation calculation. The existing methods mainly focus on integrating the error-containing telemetry angular velocity into the The error is stripped out, and after linearization, the environmental function matrix is ​​obtained and then solved; the error of the guidance method usually includes aerodynamic deviation and thrust deviation, and the aerodynamic deviation and thr...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a method for evaluating the guidance accuracy of a full strapdown guided weapon, which mainly solves the shortcomings of the current method for evaluating the error accuracy of a full strapdown guided weapon, that is, the error of the guidance tool of a full strapdown guided weapon The high-order terms in the error cannot be fully identified during separation, and the aerodynamic deviation and thrust deviation cannot be distinguished when the guidance method error is separated, which makes the accuracy evaluation method insufficiently adaptable

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