MTS Adaptive Interative Software
Adaptive iterative software from MTS has a specialized capability that can be added to standard MTS software used with Bionix Simulation systems for a wide variety of test applications.

Adaptive Iterative Control Techniques for Orthopedic Applications

Accurately replicating the forces and motions generated by the human body is a constant challenge for orthopedic researchers. In the test environment, the movement of the specimen is not restricted by the soft tissues and ligaments that are present in the human body. In addition, as the specimen experiences wear its response changes, i.e. it behaves differently.

The control of force over large displacements affects how closely specimens meet the performance criteria set forth by international standards for wear testing of total knee-joint prostheses, tibial baseplates, ankle-foot devices and other implants. Proprietary software from MTS makes it faster and easier to ensure that tests conform to the target profiles and performance curves of those standards, including ISO 14243, ISO 22675, ISO 10328, ASTM F2722 and ASTM F2723.

Adaptive iterative software from MTS has a specialized capability that can be added to standard MTS software used with Bionix® Simulation systems for a wide variety of test applications. It uses an established target profile, then applies iterative capabilities to develop system commands that achieve specimen response converging with the target profile.

Essentially, the software enables MTS Bionix simulators to learn how to follow the target profile at the beginning of the test. It then adapts to account for specimen behavior changes during the test. Adaptive compensation eliminates the need for test engineers to determine how best to adjust force control and develop alternative inputs manually.

Expanded control capacity gives labs much greater flexibility to examine tradeoffs of accuracy and throughput. Test engineers may want to explore other “what if” scenarios and compare the error rates of different approaches to matching the target profile. These capabilities enable labs to pursue all of these goals while maintaining high confidence in the test data and the durability of the final product.

The proprietary algorithms can be customized by MTS to accommodate modified performance curves that simulate different gaits, ranges of motion, or emerging “daily living” movements. These adaptive capabilities within MTS Bionix Simulation systems provide the flexibility to build unique test profiles and follow them closely, expanding the possibilities of applications.

Following a long history of software development, this is an excellent example of how MTS customers benefit from solutions developed for other industries. Adaptive iterative techniques originated in the automotive industry, where MTS experts pioneered methods for manufacturers to test real vehicle subsystems and components within a virtual environment. Applying these same techniques has proven to be beneficial in the biomedical environment.

Learn more today about how MTS Bionix Simulations Solutions can optimize the efficiency and precision of your long-term wear, fatigue and durability studies.

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