Sub-micron thermo-mechanical strain in encapsulated accelerometer arrays is mitigated using central anchor suspensions, DRIE isolation trenches, and balanced wafer stacks.
Extracting cross axis rectification coefficients requires dual tone orthogonal excitation to isolate second order asymmetric stiffness shifts from true tilt.
Vibration rectification in silicon MEMS accelerometers converts out-of-band mechanical excitation into direct current bias shifts through non-linear flexure stiffness, capacitive gap dynamics, and signal-chain clipping.
Non-linear squeeze film compression transforms high-frequency cross-axis vibration into static acceleration bias through phase-aligned mechanical gap modulation.
Non-linear vibration rectification introduces false zero-frequency DC offsets in MEMS accelerometers that distort dynamic gravity vector estimation under multi-axis vibration.
Static multi-position gravity inversion separates zero-g offset from scale factor while Allan variance bias instability defines maximum valid integration time.
Stationary leveling extracts pitch and roll by isolating the 1g local gravity vector, bounded by accelerometer bias stability and vibration rectification error.
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