Dynamic Characteristics Test of a Bearing Micro Workbench Used for Fiber Measurement

Abstract

Dynamic characteristics of a bearing micro workbench are very important in the optical fiber measurement. A quantitative analysis method used for measuring the modal frequency and damping rate of the micro workbench is studied. A parameter identification method based on modal analysis is proposed. On the basis of it, a test system used for measuring the micro workbench impulse response is put up. By making use of the impulse excitation that is generated by the instantaneous change of the surface airflow, the micro bench impulse response curve is obtained. In order to improve the signal-to-noise ratio, a series of methods are utilized, such as precise trigger sampling and superposed average of multi-period data. Experimental results show that the micro workbench has a high modal frequency and a suitable damping rate, which meets the needs of the fiber measurement.