White paper: the ultrasonic piezo drive for high-accuracy positioning
Cedrat Technologies S.Acontact supplier
‘The ultrasonic piezo drive: an innovative solution for high-accuracy positioning’
Piezo-electric motors have been successfully developed for various applications such as autofocus drives in camera lenses and handling equipment for semiconductor production. Their high speed and accurate positioning capability, combined with a favourable holding torque in unpowered condition, make piezo motors also very attractive for actuation purposes in spacecraft mechanisms. However, so far only a few studies have been reported considering their suitability for actual use in space. Piezo motors use a combination of piezo-electric and friction forces to generate a progressive motion of an output element. This white paper from Cedrat Technologies introduces a new concept of a versatile piezo motor driven at ultrasonic frequency, and it elaborates on a number of space-related issues such as the compatibility with the relevant mechanical and thermal environment. Furthermore, the possible implementation in different space mechanisms is discussed, with specific focus on miniaturised equipment as needed for small satellites.
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This paper from Cedrat Technologies is devoted to the presentation of adaptive impact absorbers applied as aircraft landing gears. The presented work discusses a possibility of utilisation of active dampers based on piezo-actuators and magnetorheological fluids (MRF) as the actuator for the proposed system. Control issues of an impact absorption system are widely presented.
A new tip-tilt mechanism based on low-voltage piezoelectric actuators has been designed by Cedrat Technologies to answer the high level of stability required for the Earthcare satellite. The Beam Steering Assembly aims to deviate a pulsed high-energy UV laser beam to compensate for misalignment between the emission and reception paths of ATLID with a very high stability and resolution.
This white paper from Cedrat Technologies presents a piezo-actuation chain suitable for aeronautical applications.
CEDRAT TECHNOLOGIES has developed the SA75 switching amplifier range in partnership with G2ELab. The SA75D model is described as the most powerful amplifier on the market for piezo actuators and is designed for applications that demand reactive power (anti-vibration, fast actuation, vibration generation and so on), such as aeronautics, machine tools and large instruments.
Technical article: a new rotating voice coil motor for Meteosat third-generation satellites download
The goal of this paper from Cedrat Technologies is to present the motor that meets the requirements of the Meteosat third-generation satellite system.