陀螺仪漂移测试小角度伺服法实验方案的改进

为了提高陀螺仪的使用精度,研究了陀螺仪漂移测试的伺服法实验技术.依托973项目,在国内首次完成了高精度单自由度静压液浮陀螺仪的伺服法实验.找到了影响小角度伺服法实验测试精度的主要误差源,即小角度伺服法实验的方法误差,通过对该误差的分析,提出了改进的小角度伺服实验方案.建立了小角度伺服法实验方法误差的仿真模型,用改进方案和原始方案分别进行了仿真和实验,结果表明改进方案同原始方案相比,陀螺仪漂移误差模型中的三项系数辨识精度均有提高.

Improved gyroscopic drift test scheme by low-angle servo method

In order to improve the precision of gyroscopes, the test method by servo technology is studied to test the drift of gyroscopes. Servo tests are finished for high-precision static pressure liquid floated gyroscopes with single degree of freedom .In small angular servo test,the the method error is found to be the main error source.A modified scheme is proposed by analyzing the error in small angular servo test.A simulation model of the method error in small angular servo test is developed.The simulations and experiments are made between the modified scheme and the original one. The results show that, compared with the original scheme, the modified scheme can improve identification accuracy of the coefficients DF,Ds,Dss in gyro drift error model.