Hydraulic

High Performance Actuators from MTS Corporation (video of 22-kip actuator)

110-Kip Actuator (244.41)

Dimensions
Displacement: Simulation Information, Frequency Response
Velocity:Simulation Information, Frequency Response, Approximate Performance Curves

220-Kip Actuator (244.51)

Dimensions
Displacement: Simulation Information, Frequency Response
Velocity: Simulation Information, Frequency Response, Approximate Performance Curves

22-Kip Actuator (244.22)

Video of this actuator in motion

Note: We do have detailed CAD drawings (SolidWorks) of most of our equipment to facilitate test planning and visualization.

Actuators 1-3 will consist of the existing 110 and 220 kip actuators (see below) commanded by Opensees via SCRAMNet and the MTS 493 controller. Actuators 4-6 will consist of our existing 20 kip 100 in/sec actuators commanded by Opensees using the NI real time LabVIEW system (developed in-house) and an MTS 458 controller per channel to control the actuators via SCRAMNet.

From Opensees' point of view, actuators 4-6 will work exactly the same as actuators 1-3. Displacement commands for actuators 4-6 will be written to SCRAMNet by Opensees. The NI real time system will read these commands and convert them to an analog command for each of the three 458 controllers. In turn the NI system will digitize the force and displacement feedback signals from each 458 and write the values back to SCRAMNet. Opensees will read these signals exactly like it does for actuators 1-3.

110 Kip Actuator 20 in/sec. Actuator

220 Kip Actuator 20 in/sec. Actuator

22 Kip 110 in/sec. Actuator

Specifications

The following curves provide and estimate of the maximum dynamic performance possible using the 220 kip and 110 kip actuators with appropriately sized servovalves.

These are predicted values and can change significantly depending on the assumption of the input models. The stiffness for the reaction was assumed to be equivalent to a MTS high force load frame of the same capacity as the actuators. If the strong floor or strong wall or portal frame deflect significantly more than the input model, the displacement/frequency performance will be reduced accordingly. The curves should be considered approximate trends as to what is possible under ideal circumstances. These curves should not be considered absolute performance as many assumptions have to be made for the input model which are not necessarily representative of the actual conditions. These curves are for single actuator cases with 100% oil supply available to the servovalve. For cases where multiple actuators are running simultaneously, the oil supply is reduced accordingly and the performance is proportionally reduced.

Disclaimer: The preceding plots represent a mathematical prediction of system performance obtained from simulation. Possession of this information is not a guarantee that a system will perform as predicted. Nor MTS, nor CU-FHT will be liable for any incidental or consequential damages or losses arising from use of this information. Interpretation of the data and its use are the sole responsibility of the user.

Performance Verification Tests

	Specification	Achieved
Frequency (Hz)	2.0	2.0
Amplitude (inches)	1.64	1.64
Velocity (in/sec)	20.0	20.6
Flow (GPM)	180	206

Three-stage Servo Valves

Distributed Hydraulic

Hydraulic Power Unit

6 Pumps/Motors (60 H.P. each), Maximum Continuous Pressure 3,000 psi, Maximum Flow Capacity 180 GPM. Dimensions 180x79x39 inches. Reservoir Maximum 500 gallons, minimum: 320 gallons.