Air-cooled electrodynamic shaker UHF series

Product overview
STEP Lab UHF series are electrodynamic, ultra-high frequency test systems designed to perform dynamic characterisation and high-frequency testing up to 1000 Hz. Systems are modular with interchangeable actuators and engineered for DMA, NVH and HCF test programs on materials and components.

Features

• Max. peak load up to 24.75 kN across the range
• Max. dynamic load up to 5.5 kN (UHF010 example)
• Test frequency up to 1000 Hz (UHF models)
• Maximum test speed up to 5 m/s
• 100% electric electrodynamic actuators (no hydraulic oil)
• High-resonance frame to minimise unwanted modes and allow multiple actuator options
• Modular design with interchangeable actuators on the same frame
• Closed-loop control for accurate force and displacement management

Industries

• Materials testing laboratories
• Automotive R&D and component testing

Tests / Applications

• DMA (Dynamic Mechanical Analysis)
• HCF (High Cycle Fatigue)
• NVH (Noise, Vibration and Harshness) measurements
• Power Spectral Density (PSD) analysis
• Fracture mechanics and fatigue studies
• Shock absorber / damper testing
• High-frequency dynamic testing of vehicular components

Main features (detailed)

• Frequency capability: up to 1000 Hz (UHF models)
• Dynamic loads: example 5.5 kN (UHF010); higher ranges available in larger models
• Peak force range across UHF: 4.40 kN — 24.75 kN
• Standard strokes: 115 mm (smaller UHF models), 160 mm (larger UHF models); XUD standard stroke 220 mm
• Maximum test speeds: up to 5 m/s (UHF), up to 6 m/s (XUD series)
• Air cooling; operating temperature 5–30 °C
• Power requirement: 3-phase 400 V
• Actuation: high-performance electrodynamic linear motors
• Control: high-resolution data acquisition and closed-loop control of force and displacement

Material testing (capabilities)

• DMA on elastomers and polymers
• High Cycle Fatigue tests on metals and composites
• Power Spectral Density (PSD) analysis for vibration characterization
• Fracture mechanics examinations under high-frequency load

Damper testing (capabilities)

• Shock absorber and damper performance testing
• NVH evaluation of components and subsystems
• Vibration analysis and transfer function measurements
• High-frequency dynamic testing of vehicle components

Technical specifications — UHF (summary)

• UHF04 — Peak: 4.40 kN, Dynamic: 2.25 kN, Static: 1.25 kN, Speed@peak: 5 m/s, Max frequency: 1000 Hz, Stroke: 115 mm, Cooling: Air, Temp: 5–30 °C, Power: 3PH 400V
• UHF010 — Peak: 11.10 kN, Dynamic: 5.55 kN, Static: 3.20 kN, Speed@peak: 5 m/s, Max frequency: 1000 Hz, Stroke: 115 mm, Cooling: Air, Temp: 5–30 °C, Power: 3PH 400V
• UHF020 — Peak: 20.75 kN, Dynamic: 10.65 kN, Static: 6.20 kN, Speed@peak: 2.7 m/s, Max frequency: 600 Hz, Stroke: 160 mm, Cooling: Air, Temp: 5–30 °C, Power: 3PH 400V
• UHF025 — Peak: 24.75 kN, Dynamic: 15.85 kN, Static: 9.30 kN, Speed@peak: 2.7 m/s, Max frequency: 600 Hz, Stroke: 160 mm, Cooling: Air, Temp: 5–30 °C, Power: 3PH 400V

Technical specifications — XUD Series (summary)

• XUD05 — Peak: 5.50 kN, Dynamic: 1.50 kN, Static: 1.00 kN, Max speed: 6.00 m/s, Max frequency: 600 Hz, Stroke: 220 mm, Cooling: Air, Temp: 5–30 °C, Power: 3PH 400V
• XUD010 — Peak: 10.40 kN, Dynamic: 2.70 kN, Static: 2.10 kN, Max speed: 6.00 m/s, Max frequency: 600 Hz, Stroke: 220 mm, Cooling: Air, Temp: 5–30 °C, Power: 3PH 400V
• XUD020 — Peak: 20.50 kN, Dynamic: 5.40 kN, Static: 4.20 kN, Max speed: 6.00 m/s, Max frequency: 600 Hz, Stroke: 220 mm, Cooling: Air, Temp: 5–30 °C, Power: 3PH 400V
• XUD030 — Peak: 31.20 kN, Dynamic: 8.10 kN, Static: 6.30 kN, Max speed: 6.00 m/s, Max frequency: 600 Hz, Stroke: 220 mm, Cooling: Air, Temp: 5–30 °C, Power: 3PH 400V

Technical summary

• Frequency capability up to 1000 Hz (UHF models)
• Dynamic load examples: up to 5.5 kN (UHF010); broader ranges in other models
• Peak force range: 4.40 kN — 24.75 kN for UHF models
• Standard strokes: 115 / 160 / 220 mm depending on model
• Max test speeds: up to 5 m/s (UHF), up to 6 m/s (XUD)
• Air cooling and 3PH 400V power requirement
• Fully electric electrodynamic actuation with high-resolution closed-loop control