ServoSled(TM) System
Seattle Safety (SESA) manufactures large payload sled systems for dynamic testing of automotive and aerospace seating and restraint systems (crash dummy testing).
SESA offers both decelerator and acceleration sled systems capability.
SESA deceleration sled system uses a pneumatically propelled sled and a programmable decelerator that can reproduce a wide variety of crash pulses with excellent predictive accuracy.
SESA also offers integrated facility packages, including: Sled System, Floodlighting, High Speed Photometrics and Triggering.
The ServoSled catapult sled system uses a hydraulically actuated friction brake acting directly against the sled. The "servo-brake" controls the net force and energy applied to the sled by absorbing excess energy produced by a pneumatic actuator. Hydraulic pressure control is by high speed computer-controlled servo-valves. The pneumatic actuator uses high pressure air to power the driving piston and a low pressure air cushion to stop the piston and ram after the test pulse. The pneumatic actuator does not include any restrictive flow controls.
Features:
- Nominal Force up to 3.7 MN at an available stroke of 2 m
- at a max. velocity of 90 km/h
- Maximum Jerk rate: 30 G/ms
- Peak G up to 135 G
- Maximum Payload: 4000 kg / 8800 lb
This breakthrough approach offers the following advantages:
- Fast – The small single-stage servo-hydraulic system gives frequency response past 500 Hz.
- Accurate – Fast servo-hydraulics allow realtime closed-loop acceleration and pressure feedback for pulse error correction.
- Easy to Use – Real-time feedback and proprietary error correction algorithms provide rapid tuning to new pulses.
- Simple – Industrial hydraulic hardware and durable mechanical components minimize maintenance and simplify servicing.
Get more information from the downloadable data sheet!
NOTE: Any performance data contained herein is operating condition dependent!
