AOCS SCOE

Special check out equipment is used for testing of spacecraft equipment and of the whole satellite. The offered AOCS SCOE solution is a unique combination of COTS components such as dSPACE^® hardware and ASTOS software. dSPACE^® builds SCOEs in series for automotive and aeronautic industry. In combination with ASTOS, a highly affordable and efficient system can be provided with 6 to 12 month lead time.

Key Features

• Dynamics and environment simulation
• Sensor and actuator modelling with runtime-adjustable error definition
• Multi-body dynamics simulation (for berthing, sloshing, CMG, etc. modelling)
• Flexible hardware solution based on industry-proven dSPACE^® components (processing units & interface cards)
• Multitude of supported emulation, stimulation and sniffing interfaces (analogue, digital, RS232, RS422, SpaceWire, MIL-STD-1553, CAN, Ethernet, etc.)
• Local and remote control from central check-out system

Reliable Hardware Concept

• Utilization of off-the-shelf dSPACE^® components that have proven their reliability in many applications
• Designed and developed in cooperation with dSPACE^®
• Galvanic isolation
• Protected interfaces
  • Over-voltage protection of interface
  • Save mode at start-up and after failure
• Power-on self-tests and continuous status monitoring
• Health monitoring (e.g. smoke, temperature, isolation)
• Time-synchronization based on PPS and NTP

Fast Adaptation to Specification Changes

• Physical to electrical IO conversion defined in Simulink model allowing easy adaptation
• Replaceable off-the-shelf interface cards
• Definition of the spacecraft including the nominal orientation of sensors and actuators using the ASTOS GUI. Changes of the specification can be easily incorporated at any time.
• ASTOS provides a multitude of environment models that can be selected via the GUI. Effects can be adjusted at run-time.

Feature-Rich User Interface

• Realistic real-time and post-processing animation
  • shadowing, reflections, atmospheric scattering, articulation, thruster exhausts
  • data overlays (sensor frustums, velocity, force, torque, etc. vectors, coordinate systems)
• Real-time and post-processing plotting
  • multi-axis, multi-data 2D plots
  • unit conversion
  • logarithmic and linear scales
  • map plots (2D and 3D) with optional GIS data overlay
• Excel and database input data import

Detailed Modelling

• Illumination of solar arrays and sun sensors
  • Local shadowing
  • Eclipses due to Earth and Moon
  • Zonal and seasonal albedo model
  • Electrical connection of solar arrays (parallel/serial) can be considered in electrical output calculation (see below)
• Flexible multi-body dynamics
  • NASTRAN models can be imported
  • Sloshing & flexible structures
  • Reaction wheels and CMGs
• System modelling (and concept analysis)
  • Power system (solar arrays, batteries, PCDUs, consumers)
  • Thermal control system (irradiation, heat conduction, thermal source)
  • Data system (data sources, storage, transmission)
  • Activity / state dependent power consumption and thermal heat generation of equipment