Review of Dynamic-Force Correction Method for a Force Transducer with the Levitation Mass Method
Akihiro Takita, Yoshiki Ono, Yusaku Fujii · 2013
In this paper, the measurement and correction method of the dynamic error of a force transducer are reviewed. The dynamic force, an impact load in this paper, is applied to an S-shaped strain-gauge force transducer is measured with using the Levitation Mass Method (LMM). In the LMM, the force acting on the force transducer is measured as a reaction force acting on a moving part of an aerostatic linear bearing which is collided with the force transducer. The force acting on the moving part is measured as an inertial force of the moving part. Finally, the inertial force is calculated by the mass and the acceleration of the moving part. As a result of comparing the forces measured by the transducer and by the LMM, it is shown that the dynamic error can be estimated by the second time derivative of the output of the transducer. Therefore, the dynamic error of the force transducer can be corrected by using the output data from the transducer itself, without using the LMM.