Actuators
MTS 243.90T Static Actuators
The SEESL lab is equipped with multiple large-scale, high-performance, dynamic and static actuators. These actuators provide the ability to conduct dynamic, pseudo-dynamic, and hybrid pseudo-dynamic testing, in which large structures could be directly subjected to dynamic excitations without the need for shake tables. Two large reaction walls are located on the eastern side of the lab, one of which is directly next to our shake tables. If equipped with dynamic actuators, this will allow for the application of computer-predicted external forces on shake table-mounted substructures, thus simulating the reaction of the entire structure (Real-Time Dynamic Hybrid Testing, or RTDHT).
Dynamic Actuators
Specifications
- Capacity: 220.0 kips (1,000.0 kN)
- Area: 75.6 in² (487.7 cm²)
- Total Stroke: 40.0 in. (1,016.0 mm)
- Length: 184.8-224.8 in. (4,693.9-5,709.9)
- Weight: 3,599.3 lb (1,634.1 kg)
- Servovalves:
- Model 256.80S:
- Flow Rate: 800.0 gpm (3,028.3 lpm)
- Peak Velocity: 40.7 in/sec (1033.7 mm/sec)
- Model 252.25:
- Flow Rate: 15.0 gpm (56.7 lpm)
- Actuator/Valve Peak Velocity: 0.76 in/sec (19.3 mm/sec)
- Model 256.80S:
Drawings
Specifications
- Capacity: 220.0 kips (1,000.0 kN)
- Area: 75.6 in² (487.7 cm²)
- Total Stroke: 10.0 in. (254.0 mm)
- Length: 184.8-224.8 in. (4,693.9-5,709.9 mm)
- Weight: 3,640 lbs 1,653.5 kg)
- Servovalves:
- Model 252.25:
- Flow Rate: 15 gpm (56.7 lpm)
- Actuator/Valve Peak Velocity: 0.76 in/sec (19.30 mm/sec)
- Model 256.25:
- Flow Rate: 250 gpm (950 lpm)
- Actuator/Valve Peak Velocity: 12.73 in/sec (323.33 mm/sec)
- Model 252.25:
Drawings
Specifications
- Capacity: 22.0 kips (100.0 kN)
- Area: 13.49 in² (87.0 cm²)
- Total Stroke: 78.75 in. (2,000.2 mm)
- Length: 141.8-220.55 in. (3,601.7-5,602.0 mm)
- Weight: 1,150 lbs (521.6 kg)
- Servovalves:
- Model 256.26:
- Flow Rate: 250 gpm (950 lpm)
- Actuator/Valve Peak Velocity: 71.35 in/sec (1,812.3 mm/sec)
- Model 256.26:
Specifications
- Capacity: 55.0 kips (250.0 kN)
- Area: 19.6 in² (126.5 cm²)
- Total Stroke: 12.0 in. (304.8 mm)
- Length: 74.76-86.76 in. (1,898.9-2,203.7 mm)
- Weight: 653.0 lbs (296.9 kg)
- Servovalves:
- Model 256.09:
- Flow Rate: 90 gpm (340 lpm)
- Actuator/Valve Peak Velocity: 17.68 in/sec (449.07 mm/sec)
- Model 256.09:
Drawings
Specifications
- Capacity: 110.0 kips (500.0 kN)
- Area: 38.5 in² (248.3 cm²)
- Total Stroke: 10.0 in. (254.0 mm)
- Length: 78.02-90.02 in. (1,981.7-2,286.5 mm)
- Weight: 2,272 lbs 1,032.9 kg)
- Servovalves:
- Model 252.25:
- Flow Rate: 15 gpm (56 lpm)
- Actuator/Valve Peak Velocity: 1.5 in/sec (38.10 mm/sec)
- Model 256.25:
- Flow Rate: 250 gpm (950 lpm)
- Actuator/Valve Peak Velocity: 25.0 in/sec (635.00 mm/sec)
- Model 252.25:
Drawings
Static Actuators
Specifications
- Capacity: 450.0 kips (2,002.0 kN) Force Tension / -600.0 kips (-2,669.0 kN) Force Compression
- Area: 150.8 in² (973.0 cm²) / 201.1 in² (1,297.4 cm²)
- Total Stroke: 40.0 in. (1,016.0 mm)
- Length*: 121.5-161.5 in. (3,086.1-4,102.1 mm)
- Weight: 7,625.0 lbs (3458.6 kg)
- Servovalves:
- Model 252.25:
- Flow Rate: 15 gpm (56 lpm)
- Actuator/Valve Peak Velocity: 0.4 in/sec (10.0 mm/sec)
- Model 252.25:
Drawings
Specifications
- Capacity: 55.0 kips (250.0 kN)
- Area: 19.6 in² (126.5 cm²)
- Total Stroke: 24.0 in. (609.6 mm)
- Length*: 98.8-122.8 in. (2,509.5-3,119.1 mm)
- Weight: 639.3 lbs (290.6 kg)
- Servovalves:
- Parker Model 801234-AAE-NR:
- Flow Rate: 15 gpm (56 lpm)
- Actuator/Valve Peak Velocity: 2.95 in/sec (74.93 mm/sec)
- Parker Model 801234-AAE-NR:
Drawings
Servovalves
Performance Data
| Servovavle Manufacturer | Quantity | Number of Stages | Flow Rate gpm [lpm] |
| MTS 252.24 | 3 | 2 | 10 [37.9] |
| MTS 252.25 | 8 | 2 | 15 [56.8] |
| MTS 256.09 | 1 | 3 | 90 [340.7] |
| MTS 256.25 | 2 | 3 | 90 [340.7] |
| MTS 256.09* | 4 | 3 | 250 [946] 90 [340.7] |
| MTS 256.18* | 2 | 3 | 180 [681.4] |
| MTS 256.80S | 3 | 3 | 800 [3000] |
* Permanent servovalve for seismic simulator