建立不等式约束条件提高三轴一体光纤陀螺装配合格率

Establishing Inequality Constraints to Improve the Assembly Qualification Rate of Three-axis Integrated FOG

共用光源的三轴一体光纤陀螺组件装配后,三轴光路探测器接收的光功率会存在差异,若差异较大导致注入电流超过规定值,则认为装配失败。针对当前缺乏有效的手段确保其装配合格率,根据光源光功率与注入电流的关系、现有光学器件的技术水平,建立了光路损耗不等式约束条件,给出了产品调试成功与否的区域。在装配过程中,引入了全光路检测设备进行光路参数检测,可提早发现并解决光路损耗异常的部件。实验表明,通过事先建立不等式约束条件,三轴一体产品的合格率由75%提高到98%,常温下零偏稳定性优于0.005(°)/h(100s, 1σ),满足任务要求。该方法为同类产品的生产提供了一定的指导意义。

The light power received by the three-axis optical path detector will be different after the assembly of three-axis integrated fiber optic gyroscope(FOG) with sharing light source. If the difference is large enough to cause the injection current exceeding the specified value, the FOG assembly is considered to be failed. Aiming at the lack of effective means to ensure its assembly qualification rate, according to the relationship between the light source power and injection current, and existing optical device level, the inequality constraints of optical path loss is established, the successful region of FOG debugging is given in this paper. During the assembly, the all optical path detection equipment is introduced to find and solve the components with abnormal optical path loss in advance. The experiment results show that the qualification rate of three-axis integrated FOG is increased from 75% to 98% by using the inequality constraints, and the zero bias stability at room temperature is better than 0.005(°)/h(100 s, 1σ), which meets the task requirements. This method has important guiding significance for the similar products.