Closed-loop guidance on-line compensation method considering any-order earth non-spherical gravitational perturbation

A compensation method and non-spherical technology, applied in the field of flight dynamics, can solve problems such as poor adaptability to large-scale ballistic deviations, reduced pre-launch survivability, and complex closed-circuit guidance algorithms

Active Publication Date: 2019-07-23
NAT UNIV OF DEFENSE TECH
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the closed-circuit guidance algorithm is usually relatively complicated, so it is difficult to take into account the influence of the earth's high-order non-spherical gravity when calculating the guidance command, and the compe

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
  • Closed-loop guidance on-line compensation method considering any-order earth non-spherical gravitational perturbation
  • Closed-loop guidance on-line compensation method considering any-order earth non-spherical gravitational perturbation
  • Closed-loop guidance on-line compensation method considering any-order earth non-spherical gravitational perturbation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0114] A closed-loop guidance online compensation method considering any order of Earth's aspheric gravitational perturbation, see figure 1 , including the following steps:

[0115] The first step is to construct the offline reconstruction model of the disturbance gravity along the ballistic trajectory, specifically: design a standard trajectory according to the missile flight mission, and build the disturbance gravity reconstruction model before the launch of the missile based on the parameters of the shutdown point of the standard trajectory (refer to the patent " The method described in the Disturbance Gravity Reconstruction Model along the Flight Trajectory), and store the position coordinate vector and disturbance gravity vector information of each grid node on the projectile.

[0116] The second step is to calculate the required velocity v based on the two-body dynamics model in each guidance cycle on the missile R , specifically: the current position vector r of the mi...

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 a closed-circuit guidance on-line compensation method considering any-order earth non-spherical gravitational perturbation. The method comprises the following steps that 1, a disturbance gravity reconstruction model is off-line constructed along a trajectory; 2, a required speed vR is calculated on the basis of a binary dynamics model in each guidance period of a missile; 3,the shutdown point state predicted on the missile in real time is taken as an input condition, and a trajectory terminal state deviation delta Xc is rapidly calculated by adopting a trajectory deviation analysis and forecast model taking consideration of the earth non-spherical gravitational perturbation; 4, a required speed correction amount delta vR is analyzed and calculated according to the trajectory terminal state deviation delta Xc; and 5, a control quantity U considering the earth non-spherical gravitational perturbation is solved. The brand-new closed-circuit guidance on-line compensation method is provided on the basis of the trajectory deviation analysis and forecast model of a missile trajectory free section, and a method support is provided for further improving the precisionof the strategic missile guidance method in China.

Description

technical field [0001] The invention relates to the technical field of flight dynamics, in particular to an on-line compensation method for closed-circuit guidance considering any order of earth's aspheric gravitational perturbation. Background technique [0002] The performance of the missile guidance system is a key factor affecting the combat effectiveness of strategic missiles. Continuously improving the accuracy of the missile guidance system and adaptability to ballistic deviation is the fundamental way to meet the current needs of rapid mobile launch and high-precision hit of strategic missiles. Closed-circuit guidance is a guidance method that performs real-time calculation according to the function expression of the control functional (such as range deviation, required speed or orbital period, etc.) according to the target data and the real-time motion parameters of the missile. This method has high adaptability and robustness, and has become the first choice of th...

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): F41G3/00
CPCF41G3/00
Inventor 郑伟王磊张洪波
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