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US 12,395,100 B2Granted
Combination piezoelectric actuator and sensor
AssigneeMTS Systems Corporation
InventorsByron John Saari, Scott Gale Johnson
Life of this patent
Estimating the term…
Abstract
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.
Claims19
A test system comprising:
- a frame;
- a hydraulic actuator mounted to the frame configured to provide a force to a test specimen;
- a piezoelectric actuator configured to apply a second force to the test specimen;
- and
- a controller configured to excite the piezoelectric actuator and provide an indication of the second force generated by the piezoelectric actuator by measurement of current or charge provided to the piezoelectric actuator.
2 more elements
A test system comprising:
- a frame;
- a hydraulic actuator mounted to the frame configured to provide a force to a test specimen, the hydraulic actuator having a piston and being mounted in a crosshead;
- an inertial mass coupled to the piston to move therewith;
- a piezoelectric actuator mounted to the inertial mass on a side opposite the piston, the piezoelectric actuator configured to apply a second force to the test specimen;
- and
- a controller configured to control operation of the hydraulic actuator, excite the piezoelectric actuator and provide an indication of the second force generated by the piezoelectric actuator by measurement of current or charge provided to the piezoelectric actuator.
3 more elements
Dependencies are inferred from the claim text.