An Adaptive Accelerometer Temperature Compensation Method for Inertial Navigation

Abstract

The invention discloses an adaptive accelerometer temperature compensation method for inertial navigation, the method comprising: S1, testing multiple sets of accelerometer data output by inertial navigation within the full temperature range; S2, multiple sets of accelerometer data obtained in step S1 Accelerometer data is calculated and analyzed to obtain the output characteristics of multiple groups of accelerometers; S3, according to the output characteristics of the accelerometers in step S2, establish multiple groups of mathematical models; S4, according to the working state parameters of the inertial navigation system, from multiple groups of mathematical models Select the best mathematical model as the temperature compensation model of the current working state for temperature compensation. The advantage is that this method collects the output data of the accelerometer in the full temperature range multiple times, uses big data to analyze the characteristics of the accelerometer changing with temperature, and obtains a variety of segmented linear or curve fitting mathematical models. Different mathematical models match the data output characteristics under different working conditions, which improves the measurement accuracy of the accelerometer and the effectiveness of the temperature compensation method.

Description

technical field [0001] The invention relates to the field of inertial navigation, in particular to an adaptive accelerometer temperature compensation method for inertial navigation. Background technique [0002] The inertial navigation system can output position, attitude and speed information under the condition of a given initial position, and has been widely used in the fields of aviation, spaceflight and navigation. It has become an important navigation device for launch vehicles, strategic weapons and submarines. In addition, inertial navigation systems have also been widely used in civil fields, such as coal mining, oil drilling and pipeline laying. Therefore, inertial navigation technology is becoming more and more important in military activities and daily life. [0003] Inertial navigation is the main component of the inertial navigation system. Its main function is to measure the angular velocity and apparent acceleration of the three axes of the carrier in real t...

AI Technical Summary

Problems solved by technology

However, these two methods require an accurate mathematical model between the output data of the accelerometer and the temperature change value. In the process of engineering application, there is a certain uncertainty in the change of the accelerometer with the temperature. There will be a certain deviation in the middle, that is, the repeatability of the zero bias of the accelerometer is poor, so it is difficult for the accelerometer to use a single curve fitting or segmented line fitting temperature compensation method to improve the measurement accuracy

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