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Input Signal Design Method for Improving the Accuracy of Spacecraft Inertial Parameter Identification

An input signal and inertial parameter technology, applied in the field of system identification, can solve the problems of difficulty in obtaining the sensitivity function of the parameter to be estimated, low efficiency of input signal optimization, etc., and achieve the effects of reducing computational complexity, accelerating convergence speed, and improving accuracy

Active Publication Date: 2016-09-14
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide an optimal input design method for improving the identification accuracy of spacecraft inertial parameters. This invention solves the problem of low input signal optimization efficiency when the existing OID method in the prior art is applied to spacecraft inertial parameter identification. The technical problem that the sensitivity function of the parameter to be estimated is difficult to obtain

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  • Input Signal Design Method for Improving the Accuracy of Spacecraft Inertial Parameter Identification
  • Input Signal Design Method for Improving the Accuracy of Spacecraft Inertial Parameter Identification
  • Input Signal Design Method for Improving the Accuracy of Spacecraft Inertial Parameter Identification

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[0043] The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

[0044] Aiming at the shortcomings of the existing methods, the present invention studies the optimal input problem of a class of parameter linearizable system identification, first describes the general mathematical model of the OID problem, and gives the basic assumptions that limit the nature of the problem; then proposes a A new optimization criterion, which can be used as a measure of the overall identifiability of the parameters to be estimated; then a new parameterization method for input signals is proposed, which can make multi-dimensional input signals orthogonal to each other, and by adding The constraints make the input signal zero at the initi...

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Abstract

The invention provides an input signal design method for increase of identification precision of a spacecraft inertial parameter. Aiming at the characteristic that the spacecraft inertial parameter can be precisely linearized by a regression matrix, the invention discloses an optimal input design method based on a direct collocation method.

Description

technical field [0001] The invention relates to the field of system identification, in particular to an input signal design method for improving the identification accuracy of spacecraft inertial parameters. Background technique [0002] The two most important steps in system parameter identification are input signal design and output signal analysis and processing. The input signal design is very important, because if an inappropriate input signal is used, even if the most advanced analysis and processing algorithm is used, the output signal cannot be obtained. Get accurate parameter estimates in the signal. Optimal Input Design (OID) refers to the design of an input signal that minimizes the parameter identification error under the condition that the input signal satisfies specific constraints. The earliest OID thought can be traced back to the research of Fisher et al. in 1935, but it is still recognized that Levin is the first scholar who systematically proposed the con...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/041
Inventor 廖瑛文援兰杨雅君王勇
Owner NAT UNIV OF DEFENSE TECH
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