High-precision orbit control attitude maintaining method and system based on CMG and medium

A high-precision, attitude technology, applied in attitude control and other directions, can solve the problems of orbit control engine installation position and nozzle angle thrust eccentricity, large fluctuation of orbit control attitude, large interference torque, etc.

Active Publication Date: 2020-04-03
BEIJING INST OF CONTROL ENG
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the normal operating conditions of the satellite, there is a large disturbance moment during the orbit control period, which is mainly due to the deviation of the installation position of the orbit control engine and the angle of the nozzle and the thrust eccentricity caused by the change of the center of mass of the whole satellite in orbit.
When using the general attitude control method, the attitude fluctuates greatly during the orbit control, which cannot guarantee the high-precision attitude control requirements

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
  • High-precision orbit control attitude maintaining method and system based on CMG and medium
  • High-precision orbit control attitude maintaining method and system based on CMG and medium
  • High-precision orbit control attitude maintaining method and system based on CMG and medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Example 1: A sun-synchronous orbit satellite with an orbital height of 500km, the satellite performs orbit control engine jet work at 200s-300s and 500s-600s at satellite time, and the disturbance torque during orbit control is Y-axis disturbance torque 0.1Nm, Z-axis 0.1Nm. The parameters of the satellite are shown in Table 1.

[0083] Table 1

[0084]

[0085]

[0086] According to the CMG-based high-precision orbit control attitude maintenance method of the present invention, the simulation results of the whole process of orbit control are as follows: Figure 2 ~ Figure 4 shown. in figure 2 is the three-axis attitude angle curve of the satellite, image 3 is the three-axis attitude angular velocity curve of the satellite, Figure 4 is the estimated value curve of satellite triaxial interference moment. Such as Figure 2 ~ Figure 4 The shown satellite only has a disturbance of 0.02 degrees and 0.01 degrees per second when the initial orbit control starts ...

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 high-precision orbit control attitude maintaining method and system based on CMG and a medium, and belongs to the technical field of spacecraft attitude control. The method comprises the following steps of according to each working period of a rail-controlled engine, firstly, calculating the disturbance torque innovation according to the angular velocity acquisition information in the current period and a control signal in the last period, then carrying out filtering correction on the disturbance torque estimation, orderly calculating the star gyro torque and the feedback control torque based on attitude angle and angular velocity collection information, and combining with a disturbance torque estimation to calculate the CMG instruction torque, and then real-timely resolving a pseudo-inverse control law to convert the instruction torque into a frame angular velocity maneuvering instruction according to the CMG configuration. By adopting the method, the problemof high-precision orbit control attitude maintenance is well solved.

Description

technical field [0001] The invention belongs to the technical field of spacecraft attitude control, and in particular relates to a CMG-based high-precision orbit control attitude maintenance method, system and medium. Background technique [0002] The attitude control accuracy during the satellite orbit control has a direct impact on the orbit control accuracy. Satellites with high requirements for business continuity hope to maintain the attitude control accuracy of normal work during the orbit control period. All of these have put forward requirements for high-precision orbit control attitude control. , the traditional jet phase plane control cannot be realized. Since the CMG can provide a large control torque, the use of CMG attitude control during orbit control can improve the accuracy of orbit control. Therefore, a scheme of using CMG for attitude maintenance during the operation of the orbit control engine is designed to achieve high-precision attitude control and save...

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 Applications(China)
IPC IPC(8): G05D1/08
CPCY02T90/00
Inventor 王淑一袁利刘其睿关新刘洁
Owner BEIJING INST OF CONTROL ENG
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