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Composite layered anti-interference filter

A composite layered, filter technology, used in instruments, impedance networks, adaptive control, etc.

Active Publication Date: 2009-11-04
BEIHANG UNIV
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  • Abstract
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Problems solved by technology

[0003] The problem solved by the technology of the present invention is: aiming at the multi-source interference system, overcoming the deficiencies of the prior art, providing a composite layered anti-jamming filter with interference cancellation and suppression performance, which solves the problem of the anti-jamming filter of the multi-source interference system Design issues, improve the filtering accuracy of the system

Method used

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Embodiment Construction

[0034] Such as figure 1 Shown, the specific implementation steps of the present invention are as follows (below taking the initial alignment of platform inertial navigation system as an example to illustrate the concrete realization of method):

[0035] 1. Establish the error state equation of the platform inertial navigation system:

[0036] In order to improve the initial alignment accuracy and cancel the small angle assumption of the azimuth misalignment angle, the attitude matrix C of the navigation coordinate system to the platform coordinate system n p for:

[0037] C n p = cos α z sin α z - α y ...

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Abstract

The invention relates to a composite layered anti-interference filter, in particular to a design of the composite layered anti-interference filter in a type of multisource jamming system. The anti-interference filter is designed aiming at the multisource jamming system containing random disturbance, energy-bounded disturbance and external model description disturbance. Firstly, a disturbance observer is structured to estimate and counteract the external model description disturbance of the multisource jamming system; secondly, the filter having H infinity and guaranteed cost performance index is structured, wherein, the H infinity performance index can be used for inhibiting the energy-bounded disturbance in the system, and the guaranteed cost performance index can be used for inhibiting the random disturbance in the system as well as optimizing and estimating the upper bound of error variance; the composite layered anti-interference filter can be formed by the disturbance observer and the filter with the robust H infinity and the guaranteed cost; finally, based on convex optimization algorithm, gain array of the composite layered anti-interference filter can be solved. The invention has the advantages of strong anti-interference property, high filtration accuracy and the like, and can be applied to a navigation and control system of aerospaceplane, etc.

Description

technical field [0001] The invention relates to a composite layered anti-interference filter with interference cancellation and suppression performance, which can be used for anti-interference filtering of multi-source interference systems, such as aerospace navigation and control systems and the like. Background technique [0002] Since various interference noises widely exist in the system and measurement process (such as inertial device drift, random noise, model uncertainty and other multi-source interference in the inertial navigation system), the suppression, compensation and offset of interference have been in recent years It has become a research hotspot in the control field. For various interference signals or random noises with bounded energy, people have proposed LQG (Linear Quadratic Gaussian, such as Kalman filter) and H 2 filter, H ∞ Filtering and other ideas can minimize the impact of interference on filter performance. For the linear controlled object, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H21/00G05B13/00
Inventor 郭雷曹松银张然文新宇全伟
Owner BEIHANG UNIV
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