基于PSD的静电陀螺仪角位移测量原理研究

针对静电陀螺仪 (ESG)极轴位置信号测量这一关键技术 ,研究了基于位置敏感器 (PSD)的 ESG角位移信号检测方案。对转子极轴顶部刻线的技术方案进行了理论研究 ,分析了其测量原理 ,给出了测量过程和解算方法 ,并根据其非线性隐函数在工程上实现较难的特点 ,进行了简化处理。数值计算证明 ,用 PSD器件测量 ESG极轴位置信号 ,其输出的直流分量在一定范围内是关于 ESG转子极轴位置的线性表征 ,因此用 PSD作为 ESG角度传感器的检测元件是可行的

Study on PSD-based Angle Detecting Principle for ESG

Concerning the angle detecting principle based on position sensitive detector (PSD) for electrically suspended gyro (ESG),the theoretical work is mainly done on the image-reflection approach.After analyzing the angle detecting principle,the mathematical model is derived and steps to calculate angle displacement of ESG's polar axis are proposed.Since the model is a non-linear and implicit function,it is simplified for engineering application.Calculations based on the simplified model show that the direct component in the output of PSD is proportional to the polar axis position of ESG in a certain range.The result verifies possibility to use PSD as a detector of ESG's angle detecting sensor.