Mts Systems Corporation

Scott Gale Johnson

Byron John Saari

Larry G Mosiman

Douglas S Morrissette

Gary S Sandlass

A test system includes a frame. A hydraulic actuator is mounted to the frame and is configured to support a test specimen. A piezoelectric actuator is configured to apply a force to the test specimen. A controller is configured to excite the piezoelectric actuator and provide an indication of force generated by the piezoelectric actuator by measurement of current or charge provided to the piezoelectric actuator.

Combination piezoelectric actuator and sensor

A material testing machine includes a support structure and a DC brushless linear motor operable to develop a force along a reaction axis. The DC brushless linear motor includes a set of magnets disposed along a line on the support structure parallel to the reaction axis. An elongated member slidably guided by the support structure on the reaction axis includes a plurality of coils proximate the set of magnets. A controller selectively energizes the coils.

Growing community of inventors

Waconia, MN, United States of America

Scott Gale Johnson