Cedrat Technologies, innovation in mechatronicsCedrat Technologies, innovation in mechatronics

Cedrat Technologies, innovation in mechatronics


P-FSM150S and M-FSM45 For large scale free space optical communication

In this publication CEDRAT TECHNOLOGIES (CTEC) presents the design and test results of the P-FSM150S Pointing Ahead Mechanism (PAM) and M-FSM45 Fast Steering Mirror (FSM) Engineering Models, developed under ARTES project TELCO-B for future FSO constellations. The specific cost-efficient hardware design is presented, dedicated to very large quantities to be manufactured, together with the performance test results over a preliminary batch of EM’s production.



P-FSM150S Fast Steering Mirror for Optical Space Constellations

New space giant constellations based on Free-Space Optical Communication (FSO) are a new challenge from many perspectives. Considering the mandatory cost efficiency, with repeatability of performances, and reliability with no defect at customer integration, requires an upheaval in space production and acceptance test methods, when the quantities are beyond several thousands of units. Starting from the former PYSCHE PAM30 flight project heritage for Deep Space Optical Communication (DSOC), CEDRAT TECHNOLOGIES (CTEC) presents the new design and test results of the P-FSM150S Fast Steering Mirror (FSM) Engineering Models, developed under ARTES project TELCO-B for future FSO constellations.



Mechatronic piezo mechanisms for active vibration control

The current trend in the market to solve long boring bar related chatter problems are passive dampers integrated in the boring bar, which has derived in patents and commercial products; This solution, however, is not feasible in very slender bars or trepanning operations, due to small space available in the tool. Active damping has been tested and indus-trialised in different applications, including machine tool structures, but never in internal turning tools. The application of active damping on boring bars has been proposed in several researches...


Contactless Position sensors for space mechanisms based on eddy current sensing

For more than 20 years, CTEC has been involved in various space missions, delivering products designed for severe environment conditions (vibrations, shocks, vacuum, humidity, wide thermal range including cryogenic). Eddy current sensor (ECS) technology, using printed circuit board (PCB) for printed coils, provides both a good resolution/accuracy and a good robustness against temperature variations.These sensors are available commercially off the shelf (COTS).



Magnetically actuated fast steering mirrors

Free-Space Optics (FSO) for optical communication request new compact low-power high-stroke high-bandwidth Fast Steering Mirrors (FSM). To address this need, CEDRAT TECHNOLOGIES has developed a Magnetically-actuated Fast Steering Mirror called M-FSM, taking heritage of its MICA™ actuators. This FSM offers Rx Ry strokes larger than +/- 2° with a 250Hz bandwidth when tilting a 31mm diam mirror. Requested power is minimized leading to low heating. Vibration tests have been performed to define first limits and conditions for the M-FSM to bear external vibrations. Large bandwidth closed loop control is achieved using integrated eddy current sensor and a state feedback-based controller.


Point ahead mechanism PAM

Point Ahead Mechanism for Deep Space Optical Communication Development of a New Piezo-Based Fine Steering Mirror

The purpose of this paper is to present the development of a novel tip-tilt mechanism, with integrated optics, designed for the JPL Deep Space Optical Communication (DSOC) module of the upcoming Psyche mission (2022 launch). This paper presents the design, assembly and tests of the produced models. Regarding the design phase, an emphasis was put on the mirror calculations to ensure that the required flatness would be maintained after integration, and that the part would withstand the thermal/mechanical environment. The actual optical measurements performed after assembly are also presented. The qualification results for a new alpha-case removal process for titanium parts are presented. Tests results are especially interesting regarding the temperature behavior of the mechanism, impact on the stroke, and strain gage sensor feedback.


BSMA Architecture

Nanometric positioning with IASI-NG Beam Splitter Mechanism Actuator

This paper presents a piezoelectric motor which provides linear motion and very high resolution (40 nm steps). First, the space application (IASI-NG instrument onboard METOP-SG satellite) and associated performance requirements are presented. The internal architecture of the motor and its main components are then explained. A first focus is done on the experimental verification of the threaded interface lifetime which is a key element of the mechanism. A second focus is on the nanometric position test bench. Achieved results are provided for resolution, motion quality and position stability. Finally, results from the vibration test campaign are presented