Guidance, Navigation, and Control experiments on the PRISMA in-orbit test bed
- Paper number
IAC-07-C1.6.01
- Author
Dr. Per Bodin, Swedish Space Corporation, Sweden
- Coauthor
- Coauthor
Ron Noteborn, Swedish Space Corporation, Sweden
- Coauthor
Örjan Vretblad, Swedish Space Corporation, Sweden
- Coauthor
Mr. Camille Chasset, Swedish Space Corporation, Sweden
- Coauthor
Mr. Robin Larsson, Swedish Space Corporation, Sweden
- Coauthor
Mr. Fredrik Nilsson, Swedish Space Corporation, Sweden
- Coauthor
Mr. Staffan Persson, Swedish Space Corporation, Sweden
- Coauthor
Mr. Matti Nylund, Swedish Space Corporation, Sweden
- Coauthor
Mr. Sytze Veldman, Swedish Space Corporation, Sweden
- Year
2007
- Abstract
The PRISMA technology in-orbit testbed will implement Guidance, Navigation, and Control strategies for advanced autonomous formation flying and rendezvous. The project is funded by the Swedish National Space Board and the prime contractor is the Swedish Space Corporation (SSC). The project is further supported by the German Aerospace Center (DLR), the Technical University of Denmark (DTU), and the French Space Agency (CNES). The project passed its Critical Design Review in February-March, 2007 and will be well into the system and integration test phase by the fall of 2007. Launch is planned for the first half of 2009. PRISMA consists of two satellites: MAIN and TARGET. The MAIN satellite is 3-axis stabilized and has full 3D attitude independent delta-V manoeuvrability. The TARGET satellite has a simplified, yet 3-axis stabilizing, magnetic attitude control system and no orbit manoeuvre capability. SSC’s GNC part of the mission consists of three main sets of experiments: The first experiment set is the Autonomous Formation Flying using an advanced GPS based navigation filter delivered by DLR. The experiment is based on passive relative formation flying which makes use of the natural orbit period. Typical relative distances range from a few hundred meters down to a few tenths of meters. The second experiment set consists of 3D proximity operations in combination with a demonstration of final approach and recede manoeuvres. In this experiment set, the MAIN S/C will fly in forced motion around a virtual structure defined about the TARGET S/C. The control will be based on GPS navigation as well as relative navigation using a Vision Based Sensor (VBS) delivered by DTU. The VBS branch of the experiment has one cooperative mode for which the TARGET S/C is equipped with LEDs, and one non-cooperative mode for which no aid is given by the TARGET S/C. The final approach and recede manoeuvre will be based purely on VBS data in a special close range mode. Typical distances for the experiment set are a few tenths of meters down to less than one meter for the final approach. The third experiment set demonstrates a complete autonomous rendezvous starting from 10 km with an autonomous localization of TARGET using the VBS. The MAIN S/C then goes autonomously down to a few tenths of metres and ending with a final approach manoeuvre as also included in the second experiment set. In addition to the three experiment sets described above, DLR will perform a set of formation flying experiments using the GPS based navigation filter and CNES will perform a series of formation flying experiments using navigation based on measurements from an RF sensor that is being developed for the Darwin mission. The PRISMA mission includes also the flight qualification of two new propellant systems – one propellant system that uses environmentally clean propellant and one cold gas micro thruster experiment based on MEMS technology. This presentation will give an overview of the GNC for the SSC-led experiments and will show how the orbit control is based on a back-bone of state-of-the-art model predictive control design. The presentation will also explain how the GNC software has been developed using automatic code generation and how the GNC subsystem is tested on software system level as well as on the integrated spacecraft.
- Abstract document
- Manuscript document
IAC-07-C1.6.01.pdf (🔒 authorized access only).
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