The Separation Mechanism for the Cassini/Huygens mission was developed by RUAG Space. Three mechanisms are housed in one integral fitting for the separation from Cassini, the front shield separation, and the back cover separation.
- Separation via Pyro-nuts and bolt-cutters
- Ejection by means of compressed springs
- Spin-up of probe via helical tracks and rollers
- Precise separation trajectory:
- V-axial = 0.3 m/s,
- V-lateral < 25 mm/s
- Spin = 6 rpm
- Umbilical connectors separation system
- Small volume and low mass (23 kg)
Low Shock Release Unit
This hold down and release mechanism is used to hold the stowed solar array panels down to the satellite sidewall during launch and to release the panels on orbit for deployment.
The basic principle of the low shock release unit is the conversion of strain energy (preload) into rotation admitting a gentle energy dissipation and a smooth release actuation with a minimum mechanical shock.
- Preload 33 kN
- Stack height up to 250 mm
- Energy relief time 3-5 times slower as the strain relief of a conventional release unit, e.g. split tool device, reduced shock on the equipment in the vicinity of the LSRU
Hold Down and Release Mechanism
Space mechanisms e.g. antenna pointing devices, require a load release during ground operations and launch. This is achieved by so called “Hold Down and Release Mechanisms” (HRM or HDRM).
The HRM units are designed to compensate for the tolerance mismatch between antenna dimensions and the location of their fixation points on the spacecraft. To damp the release shock acting on the reflector antenna, a special damper system is used.
- M10 pyronut with fully redundant NSI initiators
- Capability to compensate for manufacturing and assembly errors
- Shock release damper system reducing the overall shock level by one order of magnitude
Sealed Brush Gear Motor SBGM
The Sealed Brush Gear Motor is mainly dedicated as in orbit deployment motion control and actuation mechanism for solar array panels. But the SBGM can also be used for other applications where a robust, simple and space qualified actuator is needed. The SBGM mechanism can be operated in motor and generator (brake) mode. No complex electronic controller is needed.
Deployment Mechanism for Large Appendage DESY
RUAG Space provides a spring driven, non-reversible Deployment System for Large Appendages, which is focusing on high position accuracy and stiffness in the deployed configuration. In addition, it also provides an integrated deployment damper to eliminate the end position latching shock. This Deployment System is intended for the deployment of large appendages such as large Reflector Antennas or Solar Arrays
RUAG provides the Eddy Current Damper ECD and the Viscous Deployment Damper for passive driven mechanisms for antenna, solar array and payload deployment.
The Eddy Current Damper ECD is designed to fulfill a wide range of applications on satellites in LEO (Low Earth Orbit) and GEO (Geostationary Earth Orbit) that are used for scientific or telecommunications purposes by using a standard product to minimize costs on system level. The Eddy Current Damper is a passive device.
The Viscous Deployment Damper essentially consists of housing and rotor. When turned, the rotor forces highly viscous working fluid through narrow gaps. The resistive torque thus generated is proportional to shaft angular rotation rate and fluid viscosity. The damper is available in versions for deployment angles up to 90° and up to 270° deployment.
Interested? For more information please contact:
Niklas Boman, Director Marketing & Sales Spacecraft
T: +41 79 77 07 107