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A Probability-Interval Hybrid Accelerometer Bias Value Uncertainty Analysis Method

An accelerometer and uncertainty technology, which is applied in the field of inertial navigation, can solve the problems of large dispersion of accelerometer output offset value, increase the difficulty and challenge of navigation accuracy, and achieve the advantages of improving performance, wide application range, and optimizing manufacturing process. Effect

Active Publication Date: 2021-02-12
HUNAN UNIV +1
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  • Application Information

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Problems solved by technology

In the actual manufacturing process of the accelerometer, there are multi-dimensional uncertain factors such as the adhesive bonding angle and the dimensional tolerance of the parts, which lead to a relatively large dispersion of the output deviation of the accelerometer; it improves the navigation accuracy and its application in equipment Increased difficulty and challenges

Method used

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  • A Probability-Interval Hybrid Accelerometer Bias Value Uncertainty Analysis Method
  • A Probability-Interval Hybrid Accelerometer Bias Value Uncertainty Analysis Method
  • A Probability-Interval Hybrid Accelerometer Bias Value Uncertainty Analysis Method

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Embodiment Construction

[0035] Such as figure 1 As shown, a kind of probability-interval mixing accelerometer bias uncertainty analysis method provided by the present invention comprises the following steps:

[0036] Step 1: Analysis figure 2 Uncertainty factors in the manufacturing process of the shown accelerometer, such as image 3 As shown, according to the actual manufacturing process and engineering experience, the distribution characteristics or distribution intervals of the uncertainty factors in the accelerometer manufacturing process are analyzed and obtained, and the bonding angle between the aluminum material and the copper material, the bonding angle between the aluminum material and the silicon material 7 uncertainties of bonding angle, bonding angle of tungsten material and copper material, bonding angle of tungsten material and silicon material, bonding angle of counterweight and silicon material, height of block A and height of block B The factors are denoted in turn as x 1 ,x 2...

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Abstract

The invention belongs to the technical field of inertial navigation, and discloses a probability-interval hybrid accelerometer offset uncertainty analysis method. Multi-dimensional uncertainty variables exist in an accelerometer product, so that a part of uncertainty variables with sufficient sample information in the accelerometer product are represented by random variables, and a part of uncertainty variables with deficient sample information are described by interval variables. The method comprises the following steps: analyzing uncertain factors existing in the production and manufacturingprocess of the accelerometer; constructing an accelerometer offset uncertainty analysis model; and solving the offset value output of the accelerometer. According to the method, the influence of uncertain factors on the offset value output of the accelerometer in the production and manufacturing process of the accelerometer can be quantitatively evaluated only through a small amount of uncertainparameter information, theoretical support is provided for optimizing the production and manufacturing process and structural design of the accelerometer, and then the performance of the accelerometeris improved.

Description

technical field [0001] The invention relates to the technical field of inertial navigation, in particular to a probability-interval mixed accelerometer bias uncertainty analysis method. Background technique [0002] Inertial navigation technology is a precision navigation technology with strong autonomy, high precision, safety and reliability. It can output various navigation data in time, and can provide accurate attitude reference for the carrier, and has extremely wide applications in the fields of aviation, navigation and aerospace technology. The technology of installing an accelerometer on the carrier and calculating and processing it to obtain the trajectory of the carrier for navigation is called inertial navigation. Install an accelerometer on the carrier, use it to sensitively measure the acceleration of the carrier, and calculate and process it to obtain the trajectory of the carrier, and generate the control signal required for the movement of the carrier to con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G01C25/00
CPCG01C25/005
Inventor 姜潮李鹏飞姚中洋王中华
Owner HUNAN UNIV
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