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Large-displacement Actuators and Servo-hydraulics |
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Servo-hydraulic actuators
and ancillary hydraulic equipment are necessary to support large-displacement
physical testing for lifeline systems. Recent testing at Cornell in
collaboration with Tokyo Gas has involved the largest laboratory tests
ever performed of pipeline response to permanent ground deformation
to improve design and siting procedures for steel pipelines with elbows.
The motions imposed on the test system were on the order of a meter
so that full soil-structure interaction could be mobilized. Multiple
actuators with one-way strokes on the order of 2m will be purchased
to provide unique testing equipment that can be used on a very wide
range of buried and above-ground lifeline systems. These actuators
and supporting hydraulic equipment will provide state-of-the-art systems
not available at other experimental locations.
| Large-Displacement Actuators and Servo-Hydraulics |
Performance Specification |
| Linear Hydraulic Actuators |
Two actuators with load capacities of 295 kN tension, 498 kN compression,
strokes of +/- 0.91 meters. One actuator with load capacity
of 445 kN tension, 649 kN compression, stroke of +/- 0.63
m. |
| Hydraulic Power Supplies |
Servovalves, manifolds, and pump with flow rates and capacities for large
actuator movements and simultaneous use of multiple actuators. |
| Electronic Controls |
Independent control of either load or displacement on multiple actuators
in simultaneous use. |
| Hydraulic Wedge Grips |
Large displacement (up to 2 meter), precision and accuracy, compatibility
with signal conditioning and other control systems, fiber-optic
system capable of measuring strains up to 5000 to 10000 microstrain,
laser extensometers for large displacement measurements. |
For further information on our large arctuators and servo hydraulics,
click here.
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