CN103743410A - Beyond visual range target location precision analysis method based on Monte Carlo - Google Patents

Abstract

The invention relates to a beyond visual range target location precision analysis method based on Monte Carlo. The beyond visual range target location precision analysis method comprises the steps of generating a normal distribution random sequence according to the given delta Y; (2) showing a target location error model as follows: (img file='DDA0000443432970000011. TIF' wi='680'he='256') (/maths); 3) if the location error meets a system index requirement, performing the next step, or returning to the step 1, and regulating the delta Y to meet a system index requirement; (4) appropriately regulating the parameter in the delta Y, and enabling the error to meet the system index requirement, thus finally achieving the error distribution reasonable result. The beyond visual range target location precision analysis method provided by the invention has the advantages that the error is appropriate, the influencing error factors and the error delivery factors of the positional accuracy are found out, the reasonable error distribution is performed, a resource is fully applied, the developing schedule is accelerated, and the cost is reduced.

Description

A kind of over the horizon target Location Accuracy Analysis method based on Monte Carlo

Technical field

The present invention relates to a kind of over the horizon target Location Accuracy Analysis method.

Prior art

Airborne photoelectric tracking measurement equipment is mounted on aircraft and can carries out precision positioning to fixed ground target and maneuvering target or airbound target.Generally, the positioning error of analyzing Airborne Electro-optical Tracking System can relate to 9 coordinate systems, 31 sublinear conversion, the unified equation of 35 variablees of structure, in this case, utilize Monte Carlo method the powerful computing function in conjunction with Matlab, can complete analysis and the reasonable distribution of measuring error factor.

Former technology is most of adopts total differential method that positioning error is discussed, and the variable and the computing that relate to are many, analyze difficulty large, are unfavorable for shortening product development cycle.

Summary of the invention

In order to overcome the shortcoming of prior art, the present invention proposes a kind of over the horizon target Location Accuracy Analysis method based on Monte Carlo, can analyze and affect all error components of positioning precision and the propagation of error factor, carry out rational error distribution, and then fully application resource, accelerate Development Schedule, reduce costs.

The present invention solves the technical scheme that its technical matters takes: specifically comprise the following steps: 1), according to △ Y, produce normal distribution random series; 2), according to the location model of airborne photoelectric tracking measurement equipment $\left[\begin{array}{c}B\\ L\\ H\end{array}\right]=Q\left(Y\right)$ Formula calculates positioning error △ B, △ L, △ H, B, L, H is respectively latitude, longitude and the height of target, Q () is location model, Y is the parameter of using in elements of a fix conversion process, comprises position angle and the angle of pitch of airborne photoelectric capstan head with respect to carrier aircraft, longitude and latitude, height and the attitude information of carrier aircraft; Generally, position angle and the angle of pitch are measured by angular transducer, longitude and latitude and the attitude information of carrier aircraft are measured by inertial navigation system, carrier aircraft is measured by altimeter apart from the height on ground, every kind of measuring equipment all can be introduced corresponding measuring error, be designated as △ Y, target location error model can be expressed as follows: $\left[\begin{array}{c}\mathrm{\ΔB}\\ \mathrm{\ΔL}\\ \mathrm{\ΔH}\end{array}\right]=Q(Y+\mathrm{\ΔY})-Q\left(Y\right);$ 3) if positioning error meets system index requirement, forward next step to, otherwise return to step 1), adjust △ Y until meet system index requirement; 4), suitably adjust the parameter in △ Y, and error to meet system index requirement, finally reach the most rational result of error distribution.

The present invention can analyze affects all error components of positioning precision and the propagation of error factor, carries out rational error distribution, so fully application resource, accelerate Development Schedule, reduce costs.

Embodiment

The present invention includes the following step: 1), according to △ Y, produce normal distribution random series; 2), according to the location model of airborne photoelectric tracking measurement equipment $\left[\begin{array}{c}B\\ L\\ H\end{array}\right]=Q\left(Y\right)$ Formula calculates positioning error △ B, △ L, △ H, B, L, H is respectively latitude, longitude and the height of target, Q () is location model, Y is the parameter of using in elements of a fix conversion process, comprises position angle and the angle of pitch of airborne photoelectric capstan head with respect to carrier aircraft, longitude and latitude, height and the attitude information of carrier aircraft; Generally, position angle and the angle of pitch are measured by angular transducer, longitude and latitude and the attitude information of carrier aircraft are measured by inertial navigation system, carrier aircraft is measured by altimeter apart from the height on ground, every kind of measuring equipment all can be introduced corresponding measuring error, be designated as △ Y, target location error model can be expressed as follows: $\left[\begin{array}{c}\mathrm{\ΔB}\\ \mathrm{\ΔL}\\ \mathrm{\ΔH}\end{array}\right]=Q(Y+\mathrm{\ΔY})-Q\left(Y\right);$ 3) if positioning error meets system index requirement, forward next step to, otherwise return to step 1), adjust △ Y until meet system index requirement; 4), suitably adjust the parameter in △ Y, and error to meet system index requirement, finally reach the most rational result of error distribution.

Claims (1)

1. the over the horizon target Location Accuracy Analysis method based on Monte Carlo, is characterized in that: comprise the following steps: 1), according to △ Y, produce normal distribution random series; 2), according to the location model of airborne photoelectric tracking measurement equipment $\left[\begin{array}{c}B\\ L\\ H\end{array}\right]=Q\left(Y\right)$ Formula calculates positioning error △ B, △ L, △ H, B, L, H is respectively latitude, longitude and the height of target, Q () is location model, Y is the parameter of using in elements of a fix conversion process, comprises position angle and the angle of pitch of airborne photoelectric capstan head with respect to carrier aircraft, longitude and latitude, height and the attitude information of carrier aircraft; Generally, position angle and the angle of pitch are measured by angular transducer, and longitude and latitude and the attitude information of carrier aircraft are measured by inertial navigation system, carrier aircraft is measured by altimeter apart from the height on ground, every kind of measuring equipment all can be introduced corresponding measuring error, is designated as △ Y, and target location error model representation is as follows: $\left[\begin{array}{c}\mathrm{\ΔB}\\ \mathrm{\ΔL}\\ \mathrm{\ΔH}\end{array}\right]=Q(Y+\mathrm{\ΔY})-Q\left(Y\right);$ 3) if positioning error meets system index requirement, forward next step to, otherwise return to step 1), adjust △ Y until meet system index requirement; 4), suitably adjust the parameter in △ Y, and error to meet system index requirement, finally reach the most rational result of error distribution.