The ADL Force 5 configured for knee testing

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Annis Rich
6 years ago
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1 The ADL Force 5 configured for knee testing

Description The AMTI Force 5 is a versatile simulator that can be configured for a variety of single and multiaxis tests, such as joint simulation, product testing, materials evaluation, and

The Force 5 can replicate the loading and full range of multi-axis motion associated with activities of daily living (ADLs), like getting out of a bathtub, walking up or down stairs, squatting to

2 Description The AMTI Force 5 is a versatile simulator that can be configured for a variety of single and multiaxis tests, such as joint simulation, product testing, materials evaluation, and cadaverbased studies. It features a single testing station, which is typically configured for hip, knee, or spine simulation. The Force 5 can replicate the loading and full range of multi-axis motion associated with activities of daily living (ADLs), like getting out of a bathtub, walking up or down stairs, squatting to pick something up, and running. Up to twelve individual physiological motions can be sequenced together to define a particular ADL, providing a true-tolife system for evaluating the materials and component designs of prosthetic implants. The AMTI Force 5 simulator provides unparalleled test accuracy through its Virtual Soft Tissue (VST) control, which couples force control with a software model that accounts for the constraining influence of the tissue structure surrounding the knee. The VST model provides an accurate representation of soft tissue behavior, including nonlinear and asymmetric force displacement characteristics. The Force 5 simulator also provides a breakthrough in ease of use and accuracy through Adaptive Control Technology (ACT). Tuning time for force control simulators has traditionally been a major burden, often taking days of tweaking by an expert to get a single set of prosthetic specimens ready for testing. AMTI s ACT control system is enabled with a single click and tunes the machine s performance within about 30 cycles to levels of accuracy not obtainable with manual tuning. The combination of VST and ACT ADL-F

control technologies allow for unprecedented simulator tracking performance in both force control and displacement control modes of operation. In most scenarios, the RMS error is less than 5 percent.

The amount of distraction is easily adjusted and is measured by vertical position sensors.

3 control technologies allow for unprecedented simulator tracking performance in both force control and displacement control modes of operation. In most scenarios, the RMS error is less than 5 percent. The machine also provides a microseparation feature that simulates laxity in the constraining tissue of the hip during the swing phase of gait. The amount of distraction is easily adjusted and is measured by vertical position sensors. Four servo-hydraulic actuators drive the Force 5 s base motions, and an optional abduction head adds a fifth controlled degree of freedom (through an electric motor) to facilitate hip and spine simulation. The test station is oriented in the physiologically correct position with the contact areas immersed in a sealed, temperaturecontrolled fluid bath. A low-noise hydraulic power supply is integrated into the base of the machine for convenient, standalone installation. The simulator can be operated in both force and displacement control modes, and a six-component load cell inside the test station allows for continuous or periodic measurement of the forces and moments of the x, y, and z axes. It comes complete with an adjustable load frame for singleaxis tests. The AMTI Force 5 simulator includes a complete data acquisition and control system, which utilizes an internal digital signal processor (DSP) to perform time-critical tasks. The DSP provides up to eight channels of waveform generation, implements eight channels of PID (proportional, integral, and derivative) control to drive the machine s actuators, and manages data acquisition by multiplexing between 18 channels of analog signals and measurements. The DSP assembles the data and transfers it through an Ethernet cable to the supervisory PC, which uses AMTI s NetControl software to provide a complete operating interface for the machine. ADL-F

4 Feature highlights Possesses the full range of motion needed to replicate hip, knee, and spine movement during activities of daily living (ADLs) Virtual Soft Tissue control software model that accurately incorporates the influence of the soft tissue surrounding the knee Adaptive Control Technology breakthrough software that uses a feedback loop to automatically tune the machine s performance to new levels of accuracy Can be operated by either force or displacement control Provides adjustable microseparation of the joint during the swing phase of gait Integrated, six-component load cell for measuring the forces and moments of Fx, Fy, Fz, Mx, My, and Mz. NetControl software provides a complete operating interface through an Ethernet cable-linked computer. Capable of testing to ISO and ASTM standards for hip, knee and spine implants, including ISO , ASTM-WK451, ASTM-F , ISO/DIS , ISO , ISO , ASTM- F , ASTM-F , ASTM-F , ASTM-F , ISO/DIS-12189, ISO/DIS , and ASTM-F Temperature-controlled fluid reservoir and peristaltic pump for optional lubricated testing High-load actuators have hydrostatic bearings, which glide on a film of oil to avoid the wear associated with metal-on-metal contact. 8 All motions are servo-hydraulically generated with long-life, laminar seal actuators ( >10 cycles). The machine has a variable operating speed up to 2 Hz, allowing for the completion of up to 172,000 cycles per 24-hour period. ADL-F

Description. Modell-Nr Airless ProfessionalLine. According to ISO 1167 ASTM D 1598 ASTM D Simple and safe operation. Reliable test results

Description. Modell-Nr Airless ProfessionalLine. According to ISO 1167 ASTM D 1598 ASTM D Simple and safe operation. Reliable test results Modell-Nr. 1720 Airless ProfessionalLine According to ISO 1167 ASTM D 1598 ASTM D 1599 Description The internal pressure creep test is a test procedure for determining the strength of thermoplastic pipes.