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Amplified Piezo Actuators with embedded Eddy Current Sensor for cryo space De-SPIN mechanism

7 July 2026

Piezoelectric actuators are known as a compact and dynamic solution for space laser pointing applications. Yet, to avoid the use of an HDRM (Hold Down Release Mechanism), the usual maximum load force needs to be increased, which impacts directly on the stroke performances of the actuator. Additionally, the cryogenic environment has a significant impact on the piezoelectric components, mechanical part and integrated sensor performance, especially on strain gauges that present an advantage in compacity and precision but that cannot operate under low temperatures. The ESA funded the De-SPIN Project to address those challenges by designing and testing an actuator based on Amplified Piezoelectric Actuator (APA®) technologies that integrate new features to ensure the cryogenic compatibility, low magnetism and vibration resistance once integrated in a complete Fast Steering Mirror. This actuator can reach a 105μm stroke at -150°C with redundancy and can withstand an 18.04 g-RMS random vibration launch with a 0.125kg payload.
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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.
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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.
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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.
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Magnetic Fast Steering Mirrors for Tracking and Optical Communica-tion for Defense and Aerospace Industries

7 July 2026

Defense tracking or Space Communication applications rely on energy efficient and high precision control solutions where compactness, integration, reliability and robustness in severe conditions are critical. In order to cope with perfor-mances of Fine & Fast Pointing and Point Ahead Mechanism requirements for Defense or Space applications, CEDRAT TECHNOLOGIES (CTEC) is continuously improving its Magnetic Fast Steering Mirror products (M-FSM45 and M-FSM62) [1-3], based on proprietary MICA™ flexure bearing magnetic actuators mechanism (Moving Iron Controllable Actuator), with embedded eddy current sensors (ECS) for high controllability capacity. Thanks to its heritage and many years of experience in Magnetic Fast Steering Mirror (M-FSM) technologies, CTEC has developed new versions of the M-FSM62 and M-FSM45 through several Defense and Space R&D projects. These include a Defense project focused on InfraRed Search and Track (IRST) functions embedded on aircraft, as well as the Spanish QKD GEO project (demon-stration of a Quantum Key Distribution system embarked on a geostationary satellite) and the SOLIS project (secured optical communications services relying on geostationary satellites). These new developments achieve higher perfor-mances than current products available on the market.
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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.
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