Double-exponential function temperature compensation method

Abstract

The invention discloses a double-exponential function temperature compensation method. The double-exponential function temperature compensation method comprises the following steps that a temperaturecycling experiment is carried out on a system needing temperature compensation in a temperature-box; experimental data are pre-processed to obtain N to-be-fitted data; double exponential function is used for fitting N groups of data points to obtain an expression of a double exponential function; and the expression of the double exponential function is used for compensating original data to obtaincompensation results. The polynomial fitting effect of a higher order number can be achieved. Expression coefficients are fewer. A new alternating iteration method is adopted for fitting, and therefore initial value selection difficulty is reduced, and the problem iteration nonconvergence is decreased.

Description

technical field [0001] The invention relates to the field of temperature compensation research, in particular to a double exponential function temperature compensation method. Background technique [0002] With the development of MEMS technology, inertial sensors have become one of the most widely used micro-electromechanical system devices in the past few years, and micro-accelerometers have become inertial devices that are widely used to measure the acceleration of objects. However, the change of the ambient temperature is one of the most important reasons for the error of the MEMS accelerometer, and it leads to a significant decrease in the performance of the MEMS accelerometer. [0003] Existing temperature compensation software methods mostly use polynomial functions: [0004] such as y=a 0 +a 1 ×x+a 2 ×x 2 +a 3 ×x 3  …. Because the polynomial function is simple to calculate and can be fitted by the linear least square method, it is widely used. However, the po...

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Problems solved by technology

[0005] The present invention provides a double exponential function temperature compensation method, which solves the technical problem of large amount of calculation and complicated calculation in the existing temperature compensation method, realizes the polynomial fitting effect that can reach high order numbers, and has fewer expression coefficients. And a new type of alternate iteration method is used to fit, which reduces the difficulty of selecting the initial value and reduces the problem of iteration non-convergence

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