Servo Hydraulic Testing Systems

We have the experience to expand our servo hydraulic testing systems from not only shake tables, but to the needed parts that other labs might require. The general ideas are the same, but the applications of the shake table technologies we have designed, are very well suited to other types of systems.

Pseudo Dynamic Testing Systems

Computer controlled servo-hydraulic multi-actuator testing systems allow for fatigue testing, quasi static testing including Pseudo-Dynamic Testing (PDT). In Pseuo-Dynamic Testing a large scale test structure is attached to a strong floor, strong wall, and/or reaction frame and excited slowly at low frequencies with multiple actuators. A PC-based digital controller measures and controls the force and displacement of each actuator. Fatigue testing and basic quasi static testing use open loop control to drive the actuators with a pre-programmed time history or block cycle.

During PDT the controller internally computes the theoretical inertial forces that would exist in the true dynamic event such as an earthquake. Hence, PDT can slowly expose a structure to the forces, strains, and displacements that would actually occur during a dynamic event. The advantage over a shake table is the ability to test much larger structures, without requiring large and more expensive hydraulic power systems, shake tables, and actuators with high flow servo valves.

Triaxial Rock Testing Machines

Servo Hydraulic Solutions manufactures Triaxial Rock Testing Machines to meet any requirement. These machines mimic the down hole conditions of a drill hole, or the sub-surface strata. We can design the machines to be modular, and add the others axes as needed/required. Our custom software is designed to meet any kind of test the operator can invent. We are also one of the few companies that offer above and below ambient temperature testing of the rock specimens.

Low Cost Single Ended Actuators

We have completely re-engineered our very popular AN Series Actuators to provide you with a value-engineered fatigue rated actuator that is ideally suited for static low-cycle structural testing.

AN Series Actuators have an unequal area for tensile and compressive forces, and are typically used in applications where the load is unidirectional (does not span zero). They are more cost effective than equivalent double ended actuators, and their compact size means that they can be easily built with long stroke lengths.

Servo Hydraulic Solutions AN Series Actuators are fatigue rated, with a chrome plated heat treated alloy piston rod and high integrity polymer bearings. They are also designed for ease of maintenance with a removable seal and bearing system. Seals and bearings can easily be replaced in the field by your own technicians, using our reasonably priced repair kit, reducing the cost of maintenance, and minimizing downtime.

AN Series Actuators can be sized to meet your specific needs.