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.
Viscoelastic relaxation in polymer die attach causes time-dependent strain transfer to MEMS proof masses, driving long-term zero-g offset drift.
Thermomechanical stress relaxation in MEMS suspensions causes long-term zero-g bias drift that requires Prony series modeling and state estimation to mitigate.
Polymer die attach selection governs MEMS IMU bias drift by balancing storage modulus, glass transition temperature, and long-term viscoelastic stress relaxation.
Silicon substrate thermal expansion alters MEMS structural spacing and compliance, requiring isolated single-point anchors and 3rd-order ASIC polynomial correction.
Spatial thermal gradients across micro-machined accelerometer dies induce differential flexure expansion and zero-g bias drift remediable via symmetric layout and matrix diode compensation.
Silicon substrate expansion mismatches create stress across MEMS structures, driving zero-g drift that demands isolated anchors and hysteresis modeling.
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