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improving dynamic accuracy of closed loop bandwidth of piezo mechanisms with advanced control laws and embedded eddy current position sensors

Improving dynamic accuracy of closed loop bandwidth of piezo mechanisms with advanced control laws and embedded eddy current position sensors

14 June 2024

Fast Steering Mirrors (FSM) play an important role in diverse optical applications for beam stabilization, image sharpening or dynamic beam steering. These applications require the FSM to have a precise response across a large frequency range, thus the need of a dynamic controller. But the controller is ultimately limited, among other factors, by the performance of the sensor: its ability to measure accurately the required physical value and with a sufficient bandwidth. The compact, dynamic and precise embedded Eddy Current Sensors (ECS) developed by Cedrat Technologies, combined with a model-based controller allow a two and a half times improvement on the bandwidth compared to current sensing technology, while being more precise overall.
m fsm45 fem

Magnetic Fast Steering Mirror For High Power Feeder Links Applications

25 November 2024

To cope with performances of Fine Pointing, and Fast Steering mirror requirements for Space Optical Communication, CEDRAT TECHNOLOGIES (CTEC) is developing magnetic Fast Steering Mirror’s (M-FSM) family, based on proprietary MICA™ flexure bearing magnetic actuators mechanism (Moving Iron Controllable Actuator), with embedded eddy current sensors (ECS). FSM design expected for Optical Inter-Satellite Link (OISL) in large-scale New Space constellations is highly driven by mandatory cost-efficiency for high quantities recurrent production, while FSM design expected for Feeder-Link communication is driven instead by high power Laser requirements together with high level of redundancy. In this publication CTEC is presenting both the M-FSM45 and M-FSM45-HPL designs, and test results, respectively for inter-satellites and feeder link optical communications.
magnetic fast steering mirror for inter satellites and feeder link optical communication

Magnetic Fast Steering Mirror for Inter-satellites and Feeder Link Optical Communication

14 June 2024

In order to cope with performances of Fine Pointing, and Fast Steering mirror requirements for Space Optical Communi-cation, CEDRAT TECHNOLOGIES (CTEC) is developing magnetic Fast Steering Mirror’s (M-FSM) family, based on proprietary MICA™ flexure bearing magnetic actuators mechanism (Moving Iron Controllable Actuator), with embedded eddy current sensors (ECS). FSM design expected for Optical Inter-Satellite Link (OISL) in large-scale New Space constellations, is highly driven by mandatory cost-efficiency for high quantities recurrent production, while FSM design expected for Feeder-Link commu-nication is driven instead by high power Laser requirements together with high level of redundancy. In this publication CTEC is presenting both the M-FSM45 and M-FSM-HPL designs, and test results, respectively for inter-satellites and feeder link optical communications.
mini fsm

Miniature Piezo Fast Steering Mirror for Optical Communication in NanoSats and CubeSats

14 June 2024

Access to data has become vital and strategical for individuals and nations, Earth planet preservation and monitoring, and mobility applications. In this context, the number of satellite constellations projects is growing drastically worldwide and is a next generation challenge of the New Space cost efficient industry. To replace radio frequencies (RF) communications, space optical communication will be the new trend, addressing both very high speed and as secured encrypted communication improvements. Fast Steering Mirrors (FSM) are a key component used in optical communication, and for a large field of functions such as Point Ahead Mechanisms (PAM), Raster Scanning, Beam Steering Mirrors (BSM), Fine Pointing Mechanisms (FPM) and Line of Sight stabilization (LOS). The following paper presents test results of CEDRAT TECHNOLOGIES piezoelectric mini-FSM and associated CCBu20 driving electronics.
Piezo fast steering mirror

P-FSM and M-FSM piezoelectric and magnetic fast steering mirrors

5 September 2023

To meet needs in air, space, defence & other embedded or demanding applications CEDRAT TECHNOLOGIES (CTEC) bas developed for more than 20 years Fast Steering Mirrors (FSM). Typical applications are for example Lidar, free space optical communication (FSO) and Laser interferometry. As the spec­ifications met in these applications can vary, CTEC bas designed and patented different actuation technologies: – FSM based on Amplified Piezo Actuators APA®, as for PHARAO, ATLID, PSYCHE missions, and for future FSO space constellations as well as other large FSM for space & instrumentation as ESO ELT. – FSM based on Magnetic Actuation, as being developed for FSO and CO-OP optical communication toward Geosat. – FSM based on Stepping Piezo Actuators, as for IASI-NG for METOP-SG, as well as other piezomotor-based FSM. The presentation describes the working principle, design and performance of these different actuation concepts.
Batch of DTT35XS-NS for FSO constellation

Progress in piezoelectric fine steering mirrors for optical inter-satellite links in space constellations

12 February 2026

Free-Space Optical Communication (FSO) is rapidly expanding in space with giant satcom constellations and optical inter-sat links (OISL). This New Space market generates a strong demand for Fine / Fast Steering Mirrors (FSM) for pointing functions. To address this need, the CONECS project aims at developing LEO-space-qualified piezoelectric FSM with drive electronics: As a result, P-FSM35XS-NS and P-FSM150S, with CCBu20-NS compact control box have been designed to ensure resistance to launching and in-orbit pointing with angular strokes up to 10mrad, full stroke bandwidth up to 100Hz and a lifetime of up to five years.