Quantification dynamic threshold generation method of three strapdown inertial measurement units

A strapdown inertial group and dynamic threshold technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of adapting to quantitative dynamic threshold generation, etc., and achieve the effect of improving production accuracy and simple superposition algorithm

Inactive Publication Date: 2016-08-10
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST +1
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a three strapdown inertial group quantitative dynamic threshold generation method, using the selection method of the data window, to solve the problem of adaptive quantitative dynamic threshold generation

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  • Quantification dynamic threshold generation method of three strapdown inertial measurement units

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Embodiment Construction

[0020] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings. mainly includes:

[0022] 1. Quantile definition:

[0023] There are three different names for quantiles, namely α quantile, upper α quantile and bilateral α quantile, which are defined as follows:

[0024] Let the distribution function of the random variable X be F(X), the real number α satisfies 0<α<1,

[0025] The α quantile is such that P{Xα}=F(P α )=number of α P α ;

[0026] The upper α quantile is the number λ that makes P{X<λ}=1-F(λ)=α;

[0027] The two-sided α quantiles are respectively such that P{X1}=F(λ 1 )=number λ of 0.5α 1 , and make P{X2}=1-F(λ 2 )=number λ of 0.5α 2 .

[0028] 2. Generate ballistic data:

[0029] The ballistic data with the three strapdown inertial error model generated by the Monte Carlo shooting method is...

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Abstract

The invention discloses a quantification dynamic threshold generation method of three strapdown inertial measurement units. The method comprises the following steps: generating trajectory data with an error model through a Monte carlo shooting method according to a design concept of a data window; calculating an average data value of N sample data in sequence by means of recursion with a step length of 1 and using the average data value as a data value of the Mth sample data of new sample data, and generating the new sample data; and calculating occurrence probabilities of the new sample data, and estimating a threshold confidence interval lastly. When a device performs outputting in a pulse form, a threshold can be generated effectively, and smooth processing can be performed on data through stacking of windows, so that the production accuracy is increased, and an algorithm is simple and efficient.

Description

technical field [0001] The invention belongs to the field of high-reliability flight navigation guidance and control of large-scale carriers, and relates to a method for generating quantitative dynamic threshold values ​​of three strapdown inertial groups. Background technique [0002] In the future, large-scale launch vehicles will have higher requirements for reliability and safety. As the nerve center of the launch vehicle, the control system plays a decisive role in the performance of the entire launch vehicle. The strapdown inertial group is an important part of the guidance control, and its redundant design can greatly improve the reliability. [0003] For the three-strapdown inertial group redundant system, the threshold design is an important part of the redundant system design. A dynamic and reasonable threshold design method can ensure ease of use as much as possible and improve reliability at the same time. At present, the traditional dynamic threshold productio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 徐国强曹洁徐帆巩庆海李学峰尚腾
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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