Cedrat Technologies, innovation in mechatronicsCedrat Technologies, innovation in mechatronics

Cedrat Technologies, innovation in mechatronics

Scanning piezo mechanisms Rosetta Fligth model

The MIDAS (Micro Imaging Dust Analysis System) instrument jointly developed by IWF Graz (AT) and the Solar Space Division of ESA/ESTEC (NL) will flow on ROSETTA and will analyse the dust of the 46P/Wirtanen cometa using an Atomic Force Microscope (AFM).

30.04.2001

Active control of vibrations of a space truss using amplified piezoelectric actuators

The new piezo actuators manufactured by Cedrat Technologies have been developed for the positioning control of space optics but they are spreading widely in various engineering fields such as precise positioning, intelligent control of shapes and generation or control of vibrations. Their ability for the control or active damping of vibrations has been successfully demonstrated at the lab scale in space applications. In a first case, the piezo actuators were used for both for the control of launching vibrations and the positioning control in orbit of a telescope mirror. In a second set of space applications, these piezo actuators have been successfully integrated in a space truss using active tendons for control of micro vibrations, as publicly released at the Industry Space Days (ISD2001, Noordwijk, 9-10 Mai 2001) and as presented in this paper.

31.03.2001

Actionneurs piezoélectriques pour positionnement rapide et précis

Several classes of low voltage piezo actuators have been developed by CEDRAT TECHNOLOGIES to cover precise positioning needs and / or fast. This paper discusses the ability of these actuators to cover these needs and illustrates this through various applications (mechanisms, shock absorbers, valves) in the fields of instrumentation, space, aeronautics and automotive.

31.01.2001

3D ultrasonic imaging probes

Implementation of 3D capabilities on ultrasonic imaging systems tantalizingly proves the high interest for this diagnosing modality. However, to become a clinical tool, 3D ultrasound has to spend further technological efforts in acquisition performance and probe size to deliver on the fly, quality volumetric images as well as current functionalities.

01.01.2001

Ultrasonic Piezo Drive UPD for direct drive motorization

Existing piezo motors such as travelling wave motors present several technical limitations, they are not useable for linear drive, they cannot be easily adapted to specific rotational needs and the development of customised solution is expensive. The proposed Ultrasonic Piezo Drive (UPD) aims at overcoming these limitations. It is a shell-based stator using multilayered piezoceramics in d33 mode. Excited at only 1-10V, it produces an ultrasonic elliptical vibration large enough to direct drive any type of second body by friction. Tangential driving properties of UPD20 are typically in the range of 100-200mm/s max speed and 15-30N max force.

29.02.2000

Linear amplifiers for piezo actuators

After the development of switching amplifier SA75 for piezoelectric actuator driving, CEDRAT RECHERCHE has developed linear amplifiers. The LA75 electronics are presented in the form of a 19" rack, and are proposed into various version.

01.01.2000

Voltage sag study in distribution system

The method of fault positions has been used to study the post-fault voltage sags in the supply to a large chemical industry. the main concern are fault in the on-site distribution systems.

30.11.1999

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