Fused filament fabrication, one of the most accessible additive manufacturing technology, has already been used to manufacture piezoresistive static/quasistatic strain sensors, force sensors and wind sensors. Recent research showed that fused filament fabrication could also be used for the manufacturing of dynamic sensors. However, the manufacturing of the dynamic sensors is currently limited due to the anisotropic mechanical and piezoresistive behaviour, the heterogeneity, the large number of process parameters and poor resolution of the fused filament fabrication technology. In the thesis dynamic piezoresistivity of fused filament fabricated structures is researched. Fused filament fabricated structures are treated as a continuum. An experimental method for the identification of dynamic piezoresistive coefficients is proposed. Piezoresistive coefficients are then determined using the proposed method. Acquiered knowledge about the piezoresistive behaviour of fused filament fabricated structures is adopted to define design principles for piezoresistive accelerometer. Prototype accelerometer based on the defined principles is manufactured. Prototype accelerometer has low cross-axis sensitivity, 0-425\,Hz useful frequency range and is low in size.
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