Affiliations: [a] State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China | [b] Institute of Industry and Trade Measurement Technique, China Jiliang University, Hangzhou 310018, Zhejiang, China
Correspondence:
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Corresponding author: Wen He, Institute of Manufacturing Technology and Automation, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China. Tel.: +86 571 87952627; Fax: +86 571 87952627; E-mail: [email protected].
Abstract: A novel broadband electromagnetic angular vibrator with a disk-type rotating coil is brought forward to satisfy the calibration demand of various angular vibration transducers. First, the structure of the electromagnetic angular vibrator is introduced, and the electromechanical coupling equation is established to reveal the relation between the input and output of the vibrator. Then, in order to realize wide operating frequency range and low total harmonic distortion of angular motion output, four key technologies have been adopted in our angular vibrator, which include a rotating coil made of a multilayer printed circuit board, a rotating component with a high torsional resonant frequency, a double-magnetic-source magnetic circuit with pole shoes and a linear suspension device with large angular displacement. Finally, the performance indexes and the total harmonic distortion of output motion waveform from the developed broadband electromagnetic angular vibrator are measured. The test results show that the angular vibrator can output maximum angular displacement of 60∘ and maximum angular acceleration of 2000 rad⋅s-2, and the total harmonic distortion of the angular acceleration waveform from the developed vibrator is less than 1% over its whole operating frequency range from 0.01 to 1200 Hz, which has met the requirement of the angular vibrator for calibration according to ISO 16063-15: 2006.
Keywords: Electromagnetic, angular vibrator, rotating coil, magnetic circuit, linear suspension device
