Sinusoidal force calibration method was studied several years before at Physikalisch-Technische Bundesanstalt (PTB)~(1,2). A similar dynamic force calibration system is developed at Changcheng Institute of Metrology and Measurement (CIMM) ~3. It uses electro-dynamic shakers to generate dynamic force in the range from 1N to 20kN, and heterodyne laser interferometers are used for acceleration measurement. The force transducer to be calibrated is mounted on the shaker, and a mass block is screwed on the top of force transducer, the sinusoidal forces realized by accelerated load masses are traceable to acceleration and mass according to the force definition. The methods of determining Spatial-dependent acceleration on mass block and measuring the end mass of force transducer in dynamic force calibration are discussed in this paper.
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