Aiming at the problem that the bias of micro-electro-mechanical system（ MEMS） gyroscope is susceptible to temperature

a temperature compensation method based on adaptive piecewise fitting is proposed.According to the relationship of the temperature curve variation in full temperature range

an appropriate inflection points are extracted based on some rules. Taking inflection points as the endpoints of segmented interval

the temperature curve is divided into a plurality of unequal spacing. Each interval temperature curve is fitted by po1 ynomial method

and bias temperature compensation model is formed. Then the gyroscope bias is calculated by the model

and the calibration is finished by rem

oving the bias from the gyroscope output. The experimental results show that the proposed method has less fitting coefficient compared to the traditional fixed piecewise linear fitting

and the maximum error is reduced from 2. 56 × 10

-2

（ °）/s to 0. 51 × 10

-2

（ °）/s. The proposed method can compensate the bias under the condition of wide variation range and nonlinear change

which is suitable for practical engineering.