| Customer: ESA/ESTEC (2002 – 2004) | |
 | Static deformation control of a CFRP rigid structure via embedded piezo-ceramic actuators and fibre-optical sensors. |
The source of structural deformations of an operating telescope in orbit is mainly the thermal environment it is subjected to. These deformations lead to a shift and a change in position of the optical elements resulting in misalignment and a decrease of performance. The activity was focused on the improvement of alignment stability, pointing accuracy, deformation control and thus of optical performance of telescope structures operating under orbital environmental conditions. This objective has been reached by application of smart structure technology characterised by the use of sensing and actuating devices, which are embedded in the structure and coupled to a closed MIMO (Multiple Input Multiple Output) controller.
Future space missions, which will focus on the observation of planets like the Earth, will be based on high resolution antennas and telescope structures. The stringent requirements of these structures are limited by the environmental conditions in space. Changing thermal conditions could cause inadmissible expansions. HPS went a new approach with new multi-functional materials (e.g.: piezo ceramics) and advanced sensing methods (e.g. optical fibres) aimed at improving the performance of these structures.
Main subcontractors to HPS have been Kayser-Threde GmbH, Munich, DLR, Braunschweig and INVENT GmbH, Braunschweig.
Publications:
{filebase_from_id:14}
{filebase_from_id:35}
{filebase_from_id:54}
{filebase_from_id:31}
Statement of Work:
{filebase_from_id:24}