Autonomous attitude optimization method for star sensor
A star sensor and optimization method technology, applied in astronomical navigation, complex mathematical operations, etc., can solve problems such as the inability to realize autonomous navigation and limit the application of star sensors, achieve autonomous attitude optimization, improve attitude measurement accuracy, and improve impact Effect
Pending Publication Date: 2022-05-10
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, autonomous navigation without relying on other systems is one of the most important capabilities of star sensors, and failure to realize autonomous navigation will seriously limit the application of star sensors
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0034] refer to figure 1 As shown, it is a working flow chart of a preferred embodiment of the star sensor autonomous attitude optimization method of the present invention.
[0035] In step S1, the star sensor is modeled as a linear control system by analyzing the attitude change of the star sensor when it is working. in particular:
[0036] When the star sensor works under steady conditions, its attitude changes linearly with time, so the star sensor is modeled as a linear control system, and the present embodiment lists the state equation and measurement equation of the linear control system:
[0037]
[0038] Among them, A is the state transition matrix of the system; B is the state control matrix of the system; H is the measurement matrix of the system; x is the state vector of the system, representing the attitude of the sta...
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
Login to View More Abstract
The invention relates to an autonomous attitude optimization method for a star sensor, which comprises the following steps of: a, modeling the star sensor into a linear control system by analyzing the attitude change of the star sensor during working; b, parameters in the linear control system subjected to modeling are initialized; c, predicting a state vector and a state error covariance matrix in the linear control system by using Kalman filtering; d, correcting the predicted state vector and the state error covariance matrix in the linear control system by using Kalman filtering; and e, repeating the step c and the step d by taking the corrected state vector and the state error covariance matrix as initial values so as to realize iterative filtering of the attitude measured by the star sensor, thereby completing autonomous attitude optimization of the star sensor. The attitude measurement precision of the star sensor can be improved, and the autonomous attitude optimization of the star sensor is realized.
Description
technical field [0001] The invention relates to a method for autonomous attitude optimization of a star sensor. Background technique [0002] The star sensor is an attitude measurement instrument that uses stars as the measurement object. It has the characteristics of light weight, small size, low power consumption, high precision, strong anti-interference, and independent navigation without relying on other systems. It has been widely used Applied to attitude measurement of various space spacecraft. The attitude measurement principle of the star sensor is as follows: First, use the optical lens and the image sensor to image the star, obtain the position and brightness information of the star point on the image sensor through star point extraction and centroid positioning, and then find the star point at According to the corresponding stars in the star catalog, the three-axis attitude of the star sensor is obtained through attitude calculation according to the recognition r...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02G06F17/12G06F17/16
CPCG01C21/02G06F17/16G06F17/12
Inventor 王军何昕张磊何家维穆治亚
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI