News Column

Gnc for deployable sail de-orbit devices - expro plus.

July 28, 2014

Tenders are invited for: Gnc for deployable sail de-orbit devices - expro plus Development of a GNC functional model for active as well as passive attitude stabilization of drag augmentation devices in drag as well as solar sailing mode. Provision of a software framework for verification of the GNC functional model. While the concept of drag augmentation devices such as deployable sails as facilitator of end-of-life accelerated spacecraft deorbitation is attracting more and more interest analysis has shown that drag sail effectiveness severely deteriorates in altitudes of 750km and above due to the extremely low atmospheric density. Also as the NASA Nanosail-D mission illustrated it is not trivial to avoid flat-spin of a sail. It is therefore instrumental for the attractiveness of drag augmentation devices to achieve attitude stabilization and in case of higher altitude orbits to operate the device as solar sail rather than drag sail which requires active attitude control. The output of this activity shall allow to: -Evaluate technologies for attitude control by conventional means (e.g. magneto torque generation) and unconventional means such as sail charging for attitude control. Analysis software will be developed to assess controllability and effectiveness of sails in various AOCS modes. Ï To carry out system design analysis performing a benefits trade-off for sailenlargement geometric attitude stabilization or integration of an active attitude control device to achieve satisfactory end-of-life deorbitation effectiveness of a drag augmentation device for different target spacecraft conditions. Ï Design an AOCS architecture for attitude control in solar sailing and/or drag mode that improves system performance under consideration of CoG and CoP dependency and system impact (power thermal and TMTC needs). Ï Develop a GNC functional model that includes a Failure Detection Insulation and Recovery (FDIR) as well as sail activation logic Ï Perform verification in a software environment extending the capabilities of the analysis framework. Price Range: 200-500 keuro Closing Date: 13/10/2014

Major organization : EUROPEAN SPACE AGENCY (ESA)

Address : ESA Head Office, 8-10 Rue Mario Nikis, 75738 Paris Cedex 15

Country :France

Email :

Tender notice number : AO8007

Notice type : Tender Notice

Open date : 2014-10-13

Tender documents : T23197448.html

For more stories covering the world of technology, please see HispanicBusiness' Tech Channel

Source: TendersInfo (India)

Story Tools Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters