新型陀螺仪数字式信号提取图形的研究

Signal-obtaining Scheme for A New Type of Gyroscope

介绍了用在新型陀螺仪上一种赤道三角图形光电信号读取方案,给出了三种三角图形的实现方法,就镀层金属法和高精密机床刻制技术进行了研究和试验,分析了由于边缘效应和伪信号带来的测角误差,就两种方法实现的图形进行了比较,分析了各自对信号检测带来的影响。建立了刻线误差数学模型且进行了仿真。为了消除边缘效应和伪信号影响,提出了一种新的信号提取图形法—组合图形法,并给出了它的实现模式和试验结果。最后分析了由于图形的存在而使得转子表面不规则对陀螺性能产生的负影响,可以用这些参数来预测陀螺漂移性能。

An optical signal-obtaining scheme via triangle pattern engraved on rotor is discussed. Three kinds of realizing triangle pattern are researched. The sliver-gilt method and the engraving technology using high precise machine tool are especially studied and some relevant experiments are done. The angular errors caused by rim effect and false signal is analyzed. Comparing to engraving schemes via every kind method, the influence coming from rim is analyzed. The error models of engraving are built up and the simulation curves are provided respectively. The combined pattern is given in order to eliminate the influence coming from the rim effect and false signal. Relevant experiments’ method and outcome is worked out. The influence because of anomalous surface of rotor coming from being obtaining scheme is researched. The result of study is useful to forecast the performance of the drift of gyroscope.