中国计量科学研究院研制出频率范围0.0005Hz～1200Hz高精度角振动基准装置，低频角振动装置最大角位移300°，中频角振动装置最大角位移60°，角加速度范围从0.04 rad/s2到2000 rad/s2。装置实现了衍射式外差激光干涉仪测量方法，以及圆光栅和双光束外差激光干涉仪差动测量。角加速度复灵敏度测量不确定度（k=2）：参考点优于0.5%，0.5°，通频带优于1.0%,1°。
Abstract
Primary standard of angular vibration devices have been developed in the National institute of Metrology. The maximum angular displacement of low angular vibration device is 300 ° and medium angular vibration device is 60 °. The dynamic range of angular accelerate is 0.04 rad/s2 to 2 000 rad/s2. Diffraction grating and heterodyne laser interferometer acted as the main measurement method. At the same time, circular grating and twobeam heterodyne laser interferometer differential measurement have been realized. Uncertainty of measurement of angular accelerate sensitivity (k=2) is: 0.5%, 0.5° (reference), and others are better than 1.0%, 1.0° in whole frequency band.
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参考文献
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