  Gravimeters fabricated with MEMS suffer from temperature-dependent drifts in
their long-term stability. We analyze the thermal contributions to the signal,
and we propose three mechanisms to mitigate their effects. The first one uses
materials that fulfill the condition $\alpha_E=-2 \alpha$, where the thermal
expansion is canceled by the temperature variation of the Young's modulus. The
second one uses the thermal expansion to introduce a compression that
compensates the variation in the force of the spring. In the third one, the
expansion compensates the displacement of the proof mass in the sensor, rather
than the force. The three mechanisms are robust since they only depend on the
temperature of the sensor itself.
