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Transducers

Why Today’s Transducers need Strongly Coupled Multiphysics Design.

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VIA - Vibrating Inertial Accelerometer: Based on piezo-electricdetection of a Vibrating beam. - Courtesy ONERA.

Today’s sensors and actuators often involve multiple physical phenomena such as Capacitive –Electrostatics, Piezoresistivity, Piezoelectrity, Accoustics, Thermics, Peltier effects and ElectroMagnetics.

As components are increasingly scaled down (nanotechnology, MEMS), specific microscopicphysical phenomena assume greater importance (Electrostatic effects, Peltier). Furthermore the time constants of these physical phenomena have similar orders of magnitude (electrical, mechanicaland thermal effects).

Classical design techniques performing sequentially coupled simulations of the different physical phenomena will yield poor accuracy.

Not so with OOFELIE::Multiphysics, which can solve more than 4 of such phenomena in a single, strongly coupled simulation setup for optimal accuracy and convergence.

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Piezo-resistive pressure sensor (top left), MEMS based gyrometer (top right),
APA piezoelectric based actuator (bottom left), MEMS based flow sensor (bottom right)

In the case of actuators, the analysis focuses mainly on the mechanical response due to an electrical loading and in the case of sensors, on the inverse phenomenon. The harmonic response of accelerometers and gyrometers enters in this class of problems.