转台角速率的高速摄像测量方法

针对精确测量转台角速率在转台性能评价中的重要性问题，提出一种测量转台角速率的高速摄像方法.该方法利用平行光管作为可测目标固定在转台上，目标的空间位置与转台转动的角位置相对应，在转台转动过程中，通过高速相机记录目标空间位置实现测量，并采用像元细分技术定位的方法来提高测量精度，细分精度达到0.03个像元.利用该方法对某型号的低速转台进行了试验数据采集及分析，验证了该方法的可行性.误差分析结果表明，在转台角速率为02°/s时，该方法的测速精度可达到3.405×10^-4，完全可以用于高精度转台的角速率测量.由于高速相机的采样频率较高，因此，实现了转台瞬时角速率的测量.该方法的非接触测量方式实现了对转台角速率的客观评价.

High-speed video measurement method for rotary table angular rate

For the importance of measuring accurately the angular rate in the performance evaluation of rotary table,a high-speed video method for measuring the angular rate of rotary table was proposed.A collimator tube was fixed to the rotary table as a measureable objective,and the space position of the objective was corresponding to the rotating angular position of the table.In the rotating process of rotary table,the objective space position was recorded with a high-speed camera and thus the measurement was imple...