Temperature compensation method for accelerometer based on wavelet noise elimination

An accelerometer and wavelet denoising technology, applied in the fields of aviation and aerospace navigation, can solve problems such as lengthening of thermal conduction channels and conductive channels, long research and development cycle, and limited technical level

Inactive Publication Date: 2012-07-18
BEIHANG UNIV
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Problems solved by technology

[0009] (4) The large volume of the instrument will inevitably lengthen the heat conduction channel and the conductive channel
[0015...

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  • Temperature compensation method for accelerometer based on wavelet noise elimination
  • Temperature compensation method for accelerometer based on wavelet noise elimination
  • Temperature compensation method for accelerometer based on wavelet noise elimination

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Embodiment Construction

[0083] The present invention will be described in further detail below.

[0084] See image 3 , the present invention is an accelerometer temperature compensation method based on wavelet denoising, the specific implementation steps of the method are as follows: Step 1: design an experiment scheme, carry out a fixed-point temperature experiment on the accelerometer, and collect data. The temperature experiment adopts a static test (wherein, the X, Y, and Z axis accelerometers point to the east, north, and sky respectively). In order to study the influence of temperature on the zero bias of the accelerometer, respectively at the ambient temperature of -30°C, -20°C, -10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, 60°C (or The selected temperature point is determined according to the working temperature), and the accelerometer is tested for high and low temperature. Measure one hour after each temperature point is kept warm for two hours, and record the temperature of the acceleromete...

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Abstract

The invention provides a temperature compensation method for an accelerometer based on wavelet noise elimination, comprising the following three steps: step 1: designing an experiment scheme to carry out fixed point high-temperature and low-temperature measurement experiments; and utilizing collection software to collect data; step 2: pre-processing the data collected by the step 1, eliminating abnormal values and carrying out noise elimination treatment; and step 3: through the analysis, utilizing the data processed by the wavelet noise elimination to identify a temperature model structure of the accelerometer and solve identified model parameters. According to the temperature compensation method disclosed by the invention, the data obtained by a lot of experiments are processed by the wavelet noise elimination; and the identifications of the model structure and the parameters are carried out on the base, so as to establish a static temperature model of the accelerometer. The model established by the method completely accords with real-time compensation requirements of an engineering. Therefore, the temperature compensation method has better practical value and wide application prospect in technical fields of aviation and aerospace navigation.

Description

(1) Technical field [0001] The invention relates to an accelerometer temperature compensation method based on wavelet denoising, which elaborates the method of wavelet denoising, which is applied to the identification of the relationship between the output of the accelerometer and the temperature, and can effectively identify the relationship. Improve the accuracy of compensation models. The technology belongs to the technical field of aviation and aerospace navigation. (2) Background technology [0002] Strapdown inertial navigation system is a completely autonomous navigation method. It has the advantages of not relying on external information, strong concealment, and flexible maneuvering. It has been widely used in various military and civilian products. The accelerometer is an indispensable inertial device in the inertial navigation system, and its accuracy directly affects the accuracy of the inertial system, but the thermal drift of the device due to the change of the...

Claims

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Application Information

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IPC IPC(8): G01P15/00
Inventor 晁代宏宋凝芳王振飞宋来亮丁枫
Owner BEIHANG UNIV
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