UNIKA HDRM Preload Device
SPACERACE s.r.o.
Compact, electronically-controlled 50 kN preload/tensioning device for Hold Down and Release Mechanisms, cleanroom-safe.
Technical specifications
- Mechanical interface
- User customized mating head
- Release bolt thread
- User customized up to M10
- Generated preload
- Up to 50 kN @ max 3 mm travel
- Mass
- 2 kg (without harness and power source)
- Preload control
- Handheld display, regulation by built-in load cell
- Reset
- By supplied docking station after 10 preloads (TBC)
- Life of the SMA element
- > 100 guaranteed preloads
- Preload time
- 5-10 minutes (initial temperature dependent)
- Preload accuracy
- Better than 0.25% of target load
- Power at max preload
- Max 150 W peak
- Power supply
- 120 Wh battery in rugged mobile enclosure (2 kg)
- Safety features
- Enclosed body, energy dissipation foam, safety interface, automatic overload/overheat prevention
- Expected qualification
- Q1 2026
About
UNIKA is a light, compact, powerful preload device for tensioning Hold Down and Release Mechanisms on spacecraft, typically for solar arrays or other deployables. Preload is achieved electronically via controlled heating of a shape memory alloy element in a force-feedback loop using an internal load cell. It is corrosion resistant, uses no fluid or grease, has no parts under heavy friction, and can be safely operated in cleanroom environments, designed for small or difficult-to-access locations such as HDRM tunnels in solar arrays. Outside cleanrooms it can be hand-held and used outdoors in other industries. UNIKA is being developed under the ESA GSTP programme, with expected qualification in Q1 2026.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.
