空间三轴机抖激光陀螺交流稳频系统设计

Design of AC laser frequency stabilization system for space three-axis mechanical dithering laser gyro

针对空间三轴机抖激光陀螺设计了交流稳频控制系统,分析了系统原理,进行了Simulink仿真建模和试验研究。在系统原理中分析了控制过程,推导了系统函数,通过Simulink交流稳频系统仿真建模摸索了空间三轴机抖激光陀螺交流稳频系统中PID参数对系统响应的影响,并得到了优化参数(K_P=0.048,K_I=0.0021,K_D=0.0037),为硬件调试提供了参考。将交流稳频控制系统应用于国产某型空间三轴机抖激光陀螺进行试验,试验结果显示通过PID参数调节后的交流稳频陀螺PZT码值变化平稳,陀螺静态脉冲输出稳定,与原直流稳频控制方法相比将空间三轴机抖激光陀螺的精度提高了20%。

To design an AC laser frequency stabilization system for the space three-axis mechanical dithering laser gyro, the principle of the AC frequency stabilization system is analyzed, the system simulation model based on Simulink tool is built, and the experimental research is made. In the principle analysis, the control procedure of the system is analyzed, the system function is deduced, and the influence of PID parameters on the system response in the AC laser frequency stabilization is explored through the system simulation model based on Simulink tool. Then, the optimal PID parameters（KP=0.048, KI =0.0021, KD =0.0037） are obtained, which can provide reference for the system debugging. Finally, the test experiment is made by applying the AC laser frequency stabilization system into some Chinese-made space three-axis mechanical dithering laser gyro. The experiment results show that the PZT code value and the gyro pulse output of the AC frequency stabilization gyro are stable by using PID parameters control, and the precision of the space three-axis mechanical dithering laser gyro is increased by 20% compared with that by the original DC laser frequency stabilization control method.