Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Control Method of Forced Flying Around Non-cooperative Targets

A control method, non-cooperative technology, applied in attitude control, aircraft, space navigation equipment, etc., can solve the problem that the orbiting mission cannot meet the requirements of low fuel consumption and high precision, is not suitable for long-term orbiting mission, relative position or Attitude divergence and other problems, to achieve the effect of small overshoot, low fuel consumption, and short convergence time

Active Publication Date: 2020-11-06
NORTHWESTERN POLYTECHNICAL UNIV
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is suitable for short-period, high-precision fly-around missions. Its advantage is high precision, and the orbit and period of the fly-around can be adjusted in real time. The disadvantage is that it is not suitable for long-term fly-around missions.
[0003] Due to problems such as unknown external interference, strong nonlinearity, and measurement noise, the use of conventional controllers may cause the fly-around mission to fail to meet the low fuel consumption and high-precision requirements, and may even cause relative position or attitude divergence, resulting in the failure of the fly-around mission

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
  • A Control Method of Forced Flying Around Non-cooperative Targets
  • A Control Method of Forced Flying Around Non-cooperative Targets
  • A Control Method of Forced Flying Around Non-cooperative Targets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0047] Step 1: Establish a dynamics model of non-cooperative forced circling

[0048] Firstly, the process of establishing attitude kinematics equation is as follows:

[0049]

[0050] Where σ is the modified Rodrigue parameter, I is the moment of inertia matrix, E 3 Represents a 3×3 identity matrix, M c is the control torque, M d Interference torque for various environments; θ, ψ respectively represent the three Euler angles corresponding to the three axes of x, y, and z; ω b is the angular velocity of the accompanying spacecraft body coordinate system relative to the inertial system; H(σ,ω b ) is a parameter matrix in the system operation process; G(σ) represents the state matrix of attitude kinematics;

[0051] S(ω b ) represents the vector ω b The cross-product matrix of , whose components are in the form

[0052]

[0053] Then establish a...

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 relates to the control method of non-cooperative target forced fly-around. The method comprises the following steps of establishing the kinetic equation of a forced fly-around process; calculating the deviation kinetic equation of the expected pose of the forced fly-around process; using a first order instruction filter to acquire an unknown state variable; estimating the uncertaintyof the system model of the fly-around process and calculating the adaptive input ua of a system; and calculating the optimal control input uop of the system and the total input u of the system. In the invention, the optimal control method is adopted; and under the condition that an error reaches a requirement, the fuel consumption of the system is minimum; the first order instruction filter is used to acquire an unknown state variable value so that the influence of noise measurement on the state variable can be effectively reduced; and the uncertainty of a fly-around process model is estimated so that the influence brought by the uncertainty can be effectively compensated, a overshoot amount in a control process is less, convergence time is short and control precision is high.

Description

technical field [0001] The invention belongs to the field of spacecraft control technology research and relates to a control method for forcing non-cooperative targets to fly around. Background technique [0002] Space orbiting missions are divided into natural orbiting, impulse orbiting and forced orbiting. Natural orbiting refers to the orbiting without exerting control force on the accompanying spacecraft, and only relying on the relative initial conditions between the accompanying spacecraft and the target spacecraft. The advantage is that the fuel consumption is very small, and the disadvantage is that the orbiting period is long (equal to the orbital period), the flying trajectory is fixed and the requirements for the initial value are very high. Pulse orbiting means that when the relative position reaches a specific point, a specific duration of control force is applied to the accompanying spacecraft. Its advantage is that the orbiting trajectory and orbiting period ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/08
CPCB64G1/244
Inventor 黄攀峰刘习尧孟中杰张夷斋张帆刘正雄董刚奇
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com