Spacecraft adaptive fault-tolerant attitude tracking control method with specified tracking performance

A control method and tracking control technology, applied in the direction of attitude control, aerospace vehicles, aircraft, etc., can solve problems such as safety problems, economic losses, and failure of actuators

Active Publication Date: 2018-06-19
BEIHANG UNIV
View PDF4 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, although scientific researchers have taken various measures to improve the reliability of spacecraft, in harsh space environments, such as spacecraft actuators exposed to weightlessness, low temperature, and strong radiation for a long time, Coupled with the aging and wear of its own components, it is possible to cause the actuator to fail, and it is more likely to cause the paralysis of the entire control system, resulting in huge economic losses and safety problems.

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
  • Spacecraft adaptive fault-tolerant attitude tracking control method with specified tracking performance
  • Spacecraft adaptive fault-tolerant attitude tracking control method with specified tracking performance
  • Spacecraft adaptive fault-tolerant attitude tracking control method with specified tracking performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The concrete implementation of the present invention is described in detail below, it is necessary to point out here that the following implementation is only used for further description of the present invention, and can not be interpreted as limiting the protection scope of the present invention. Some non-essential improvements and adjustments still belong to the protection scope of the present invention.

[0049] In the first step, considering various external disturbances to the spacecraft, the kinematics model and dynamics model of the spacecraft can be described as:

[0050]

[0051] where J∈R 3×3 is the inertia matrix in the body coordinate system B, which can be designed as u=[u 1 , u 2 , u 3 ] T ∈R 3 , represents the propulsion force provided by n propellers, T d =[T d1 , T d2 , T d3 ] T ∈R 3 Indicates the external disturbance torque suffered by the spacecraft, and the periodic external disturbance is set to T d =0.2×[sin(0.2πt),sin(0.1πt),sin(...

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 spacecraft adaptive fault-tolerant attitude tracking control method with specified tracking performance. The method comprises steps: a kinematic model and a dynamic model ofthe spacecraft are built based on a certain amount of external disturbance on the spacecraft; based on the dynamic model of the spacecraft and based on unknown system fault on a spacecraft executor, an unknown actuator fault system model is built; based on the unknown actuator fault system model, a conversion error and a performance function are designed, and thus, the tracking error of the spacecrafts tends to be arbitrarily small minimum residual set under the specified tracking performance and the maximum overshoot; and the effects of the fault are compensated by estimating the boundary offault uncertainty, an adaptive fault-tolerant controller is designed, and the system tends to asymptotic stability. The method of the invention realizes high-precision system attitude tracking controlon the premise of ensuring the robustness of the system.

Description

technical field [0001] The invention belongs to the technical field of spacecraft control, and relates to a spacecraft adaptive fault-tolerant attitude tracking control method with specified tracking performance, which is mainly applied to the attitude tracking control of spacecraft. Background technique [0002] Attitude tracking control of spacecraft is a very important issue for many space missions, such as earth observation, near space monitoring, and space on-orbit service. In the past research, scholars have adopted various control schemes, such as high-order sliding mode control, finite time control, and robust backstepping control. But the core idea of ​​these methods is to have actuators that are functioning normally, and each actuator has a rigid body spacecraft that responds perfectly to a given control signal. In fact, although scientific researchers have taken various measures to improve the reliability of spacecraft, in harsh space environments, such as spacec...

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
CPCB64G1/244
Inventor 胡庆雷王陈亮王鹏程郭雷
Owner BEIHANG UNIV
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