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

Re-entry attitude control method for reusable vehicle

An attitude control and carrier technology, applied in attitude control and other directions, can solve the problem of low efficiency of RCS instruction allocation

Active Publication Date: 2017-03-29
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the inefficiency of the existing method for RCS instruction distribution, the present invention provides a re-entry attitude control method for reusable vehicles

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
  • Re-entry attitude control method for reusable vehicle
  • Re-entry attitude control method for reusable vehicle
  • Re-entry attitude control method for reusable vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] refer to Figure 2-4 . The specific steps of the re-entry attitude control method of the reusable vehicle of the present invention are as follows:

[0055] 1. Design of reentry attitude controller for RLV.

[0056] In order to simplify the design of the controller, ignoring the influence of small quantities such as the earth's autobiography and Coriolis force changes on the attitude change of the aircraft, the nonlinear attitude motion model of the RLV reentry process is:

[0057]

[0058]

[0059]

[0060]

[0061]

[0062]

[0063]

[0064]

[0065] in

[0066]

[0067]

[0068]

[0069] In the formula, α represents the aerodynamic angle of attack of the aircraft, β represents the aerodynamic sideslip angle, and γ v Indicates the speed roll angle; ω x , ω y , ω z are the attitude angular velocity in the roll, yaw and pitch directions respectively; M x , M y , M z is the three-channel torque of roll, yaw, and pitch; L is the li...

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 discloses a re-entry attitude control method of a reusable launch vehicle (RLV), and aims at solving the technical problem of an existing method that the distribution efficiency of an RCS (Reaction Control System) instruction is low. According to the technical scheme, the re-entry attitude control method comprises the following steps: firstly, designing all combinations in all control directions of all thrusters in all control directions of an RCS; adopting an integer linear planning method to realize real-time instruction distribution in a determined required moment direction combination; solving the integer planning method by using a genetic algorithm. Control instruction distribution of the RCS is converted into a dimension-lowering integer linear planning method; compared with a background technology, the requirements of the RLV re-entry attitude control are combined; the amplitudes of the thrusters and the fuel combustion of the RCS are considered, and an offline design optimal table is not needed under the condition that the thrusters have the fault, so that the complexity of the thrusters is reduced; the real-time efficiency of the RCS instruction distribution is improved through the dimension-lowering treatment; the RCS fault reconstruction of minimum RCS energy consumption and instruction moment tracking errors is realized.

Description

technical field [0001] The invention relates to a method for controlling the reentry attitude of a carrier, in particular to a method for controlling the reentry attitude of a reusable carrier. Background technique [0002] refer to figure 1 . The literature "Spacecraft Real-time Command Allocation Optimal Look-Up Method Considering Thruster Thrust Upper Bound and Fault Conditions, Acta Astronautica Sinica, 2010, vol31(6), P1540-1546" discloses an optimal real-time command look-up table for spacecraft Law. This method considers the existence of the upper bound of the thruster amplitude and the failure of the thruster when the satellite is in orbit, and supplements the original optimal look-up table method based on the simplex algorithm in linear programming, and gives the thruster in the two cases Real-time optimal look-up table method for instruction allocation. The algorithm can enhance the control ability of the thruster configuration while maintaining the optimality ...

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
Inventor 周军常晶呼卫军卢青
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