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
Microscanning is a key technique in high-resolution IR imaging field.Two technologies are proposed by CEDRAT TECHNOLOGIES (CTEC): moving a lens with a XY25XS Stage or tilting a mirror with a DTT15XS mechanism.
Micro-scanning, Dithering or Pixel shifting
Fast steering mirror FSM for SiC large aperture mirror with its controller rack.
High power laser, line of sight stabilisation for atmospheric disturbance compensation.
In the context of CNES future observation satellite and DGA funding, and in collaboration with CNES and SODERN, CTEC designed a large space mechanism.
The MEFISTO mechanism is dedicated to fillet compensation for space telescopes.
Fast steering mirror FSM with 120 mm diameter SiC mirror.
Space, point-ahead mechanism for infrared telescope.
Thanks to the heritage from the PHARAO DTT, CTEC has developed the ATLID Beam Steering Mechanism (BSM).
Space
Fast steering mirror FSM for 80 mm diameter mirror.
High power laser, atmospheric disturbance compensation.
Fast steering mirror FSM for 50 mm diameter mirror with CCBu20 controller box.
Line of sight stabilisation.
Compact fast steering mirror FSM with its controller box for embedded electro optic systems.
Image stabilisation and micro-scan combined in a single unit (5th and 6th axis of gyro stabilised platform).
For the ESA EChO mission, the use of a fine steering tip and tilt mechanism ensures the stability of the line of sight for a telescope operating in cryogenic conditions.
Space, pointing
Fast steering mirror FSM for 50 mm diameter mirror with its controller rack.
High power Laser, atmospheric disturbance compensation.
DTT35XS-space is a very light piezoelectric tip-tilt mechanism designed according to ECSS space rules for Pharao mission and delivered to EADS.
Instrumentation, Optics etc.
OPDA is an outstanding example of accurate mechanisms for instrumentation in a harsh environment. This X stage has been delivered to Oerlikon Contraves for LISA mission.
Optical Delay Line, Space mechanism, Intrumentation etc.
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