Piezo mechanisms are based on at least one piezo actuator and on additional functions:
Most of CEDRAT TECHNOLOGIES' piezoelectric mechanisms are based on standard or customised Amplified Piezoelectric Actuators (APA®) or Parallel Pre-stress Actuators (PPAs).
They allow the realisation of X and XY stages, tip-tilts, hollow actuators, shutters and 5 or 6 degrees of freedom precision mechanisms.
CEDRAT TECHNOLOGIES' piezo mechanisms benefit from a large aerospace heritage, which itself results from the design choices towards a high reliability and a high energy density: CEDRAT TECHNOLOGIES' piezoelectric actuators are highly pre-stressed and do not include weak points (as hertzian pivot or flexural hinges). This provides several advantages : a very good ability to withstand external loads (as external vibrations), high dynamics (capability in a large bandwidth from Dc to above resonance) and a long life time.
CEDRAT TECHNOLOGIES' monolithic (solid state) piezo mechanisms combine one or several actuators and guidance in one single part, as in the XY stages. This provides additional benefits in terms of compactness, cost and reliability.
The following examples show various prototypes and customised products. Other examples can be found in the mechatronic systems section and among the related publications.
This mini FSM offers a stroke of 12 mrad and a resonant frequency of 1700 Hz, with a mass of 50 gr. It is a good candidate for all projects involving nano satellites or cube satellites, and is a high end alternative to MEMS, which reliability and resistance to space conditions are still being questioned.
3U CubeSat; nano satellites
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