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Rotating step by step piezomotor for nanopositioning and space applications
19 June 2023
Piezomotors are well known in various applications where high precision actuation is required like AFM or handling equipment for semiconductor production. Their specific low speed in direct drive and high torque characteristics combined with high holding torque in off power conditions make them very attractive for any positioning application and especially space mechanisms where low electrical consumption is always sought. A new concept of rotating stepping piezomotor has been developed in the frame of the LISA space project where the mechanism of the telescope orientation was addressed.
Large Stroke Fast Steering Mirror for Space Free-Space Optical communication
2 March 2020
Free-Space Optics and Deep Space Optical Communication request new compact low-power high-stroke high-bandwidth Fast Steering Mirrors. To address this need, CEDRAT TECHNOLOGIES has developed a Magnetically-actuated Fast Steering Mirror called M-FSM, taking heritage of its MICA⹠technology. This mechanism offers Rx Ry strokes larger than +/-2° with a 250Hz bandwidth when tilting a 10mm-diameter mirror. Closed loop control is achieved using integrated eddy current sensors. Requested power is reduced leading to low heating and allowing high duty cycle. Vibration tests allow to define first limits and conditions for the M-FSM to bear external vibrations.
ACTUATOR2008 Stepping piezoelectric actuators Abstract
19 June 2023
Stepping Piezoelectric Actuators (SPA) are new long-stroke linear piezoelectric motors for micro/nano positioning applications benefiting of the advantages and the heritage of the APA. SPA are formed of only 4 parts: the well-established Amplified Piezoelectric Actuators (APA), a front mass, a clamp and a rod.
Large stroke Rotary Voice Coil Motor for cryogenic application
19 June 2023
CTEC is developing and testing Rotary Voice Coil Motors (RVCM) for new cryogenic space scan mechanisms applications,
based on former MTG space program heritage. The RVCM is an electromagnetic motor based on Laplace force.
The motor is composed of coils at the rotor part (mobile) and magnets at the stator part (fixed). The Laplace motor
generates a pure torque, without cogging or parasitic force drawback, which makes it specifically relevant for scan mechanisms.
ACTUATOR2008 Stepping piezoelectric actuators based on APAÂź
1 January 2008
Abstract:
Stepping Piezoelectric Actuators (SPA) are new small long-stroke linear piezoelectric motors for micro/nano positioning applications benefiting of the advantages and the heritage of the APA. SPA is formed of only 4 parts: the well-established Amplified Piezoelectric Actuators (APA), a front mass, a clamp and a rod. SPA operates by accumulation of small steps, using inertial mode, impact forces and stick-slip effects, allowing performing long strokes (> 10mm). Main advantages induced by the choice of the APA above a usual inertial drive mechanism (IDM) are high reliability, low peak current ( 20mm/s), useful forces (from 1N for XS to 30N for SM type) and nano positioning mode.
Actuators for Space Applications: State of the Art and New Technologies
19 June 2023
Actuators in space are broadly used to operate satellitesâ platform and payload devices. Despite their common utilisation, actuators still represent critical subsystems as their failure might often lead to severe, when not catastrophic, effects on the spacecraft operations. Environmental conditions to which actuators are exposed in space are generally not favourable: operating temperature ranges and deep vacuum are certainly the most critical ones.
