论文部分内容阅读
根据球形差动电容传感器测量微位移的原理,针对八电极结构的超导陀螺仪分析了每对测量电极上悬浮转子偏移量与电容变化量间的关系。通过无量纲化和微位移范围内线性化处理及利用最小二乘算法,建立了转子偏移测量模型。给出了基于该模型的超导陀螺转子偏移测试方案及其各参数间的关系。分析了影响陀螺转子偏移测量精度的因素。超导陀螺转子偏移测试方案的特点是为保证悬浮转子的零电位而采用4对测试电极的电极分布法,能同时测量出转子偏移的大小和偏移方向。实验结果表明,差动电容传感器的分布电容、陀螺转子的零电位和模型误差等是影响测量精度的主要因素。提出了降低相应因素不良影响的方法及输出电压与转子偏移量呈线性关系模型的适应范围。
According to the principle of spherical differential capacitive sensor to measure micro displacement, the relationship between the displacement of suspended rotor and the capacitance variation of each pair of measuring electrodes is analyzed for the superconducting gyroscope with eight electrode structure. Through the linearization in the non-dimensional and micro-displacement range and using the least squares algorithm, the rotor displacement measurement model was established. Based on this model, the test scheme of the superconducting gyroscope rotor displacement and the relationship among the parameters are given. The factors that affect the accuracy of gyro rotor offset measurement are analyzed. Superconducting gyro rotor displacement test program is characterized by the zero potential of the suspended rotor and the use of four pairs of test electrode electrode distribution method, which can simultaneously measure the size of the rotor offset and offset direction. The experimental results show that the distributed capacitance of differential capacitance sensor, gyro rotor zero potential and model error are the main factors affecting the measurement accuracy. The methods to reduce the adverse effects of the corresponding factors and the adaptive range of the model in which the output voltage and the rotor offsets are linear are proposed.