Analyzing method of free phase ballistic error propagation under nonspherical perturbation effect of the earth

An analysis method and error propagation technology, applied in the field of flight dynamics, can solve the problems of large deviation of non-spherical perturbation factors, unclear error propagation characteristics, and low compensation order of compensation methods

Active Publication Date: 2016-06-22
NAT UNIV OF DEFENSE TECH
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Even in a few cases, the earth's non-spherical perturbation factor has been preliminarily compensated to partially reduce the hit accuracy deviation caused by the non-spherical perturbation factor, but due to the incomplete characterization theory of the earth's non-spherical Clearly, there are various defects in the compensa...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Analyzing method of free phase ballistic error propagation under nonspherical perturbation effect of the earth
  • Analyzing method of free phase ballistic error propagation under nonspherical perturbation effect of the earth
  • Analyzing method of free phase ballistic error propagation under nonspherical perturbation effect of the earth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0190] An analysis method for ballistic error propagation in the free segment under the earth's non-spherical perturbation, the details are as follows:

[0191] The perturbation term is respectively taken as the J2 term gravitational acceleration and the 36th order disturbance gravitational acceleration (see Figure 5 , Image 6 , Figure 7 with Figure 8 ), with the earth center distance being 6465411m as the terminal condition, the launch azimuth angle is carried out in all directions, to verify the accuracy of the analysis and calculation of the present invention.

[0192] Disturbance calculation method is: spherical harmonic function method.

[0193] The gravity model is: EGM2008 model (EGM refers to the earth's gravity field).

[0194] The configuration of the simulation computer is: Intel(R) Core(TM) i5-3470CPU3.20GHz, the memory is 3.46GB; the software environment is the WindowXP operating system, and the calculation program is developed based on VC++6.0.

[0195] ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an analyzing method of free phase ballistic error propagation under nonspherical perturbation effect of the earth. For a typical ballistic missile, firstly, under a condition of considering the nonspherical perturbation effect of the earth, a high precisely simplified model applicable to free phase motion analysis and calculation is built; then according to small error assumption and linear system theories, an equiangular/equal geocentric distance/isochronous propagation model and the state transition matrix analytical solution of the equiangular/equal geocentric distance/isochronous propagation model are exported; further through decoupling lengthways and lateral propagation models, lateral errors resulting from higher order terms are corrected based on a least square fitting method; and the balance between the speediness and the accuracy in calculating the free phase ballistic characteristic under nonspherical perturbation effect of the earth is realized. The method provided by the invention has the advantages of rapid calculation speed, wide application area and accurate correction model and satisfying demands for rapid mobile lunch and on-missile real time calculation.

Description

technical field [0001] The invention relates to the technical field of flight dynamics, in particular to an analysis method for ballistic error propagation in a free segment under the earth's non-spherical perturbation. Background technique [0002] The main factors causing the deviation of the ballistic missile landing point include the error of the guidance tool and the error of the guidance method. With the improvement of the hardware level of the inertial measurement system, part of the error of the guidance tool can be effectively corrected, so that the error of the guidance tool of the ballistic missile is gradually reduced, so that the influence of the error of the guidance method is becoming more and more prominent. Moreover, the non-spherical perturbation of the earth is what causes the error of the guidance method. main cause of error. For intercontinental ballistic missiles with a range of more than 10,000 kilometers, the influence of the oblate earth perturbatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 郑伟徐秦王磊李彬周祥
Owner NAT UNIV OF DEFENSE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap