对称壳体振动陀螺模态交换的FPGA实现方法研究

Research on FPGA Implementation Method of Mode Reverse of Symmetrical Shell Vibration Gyro

对称壳体振动陀螺具有阻尼不均匀性难以消除且零偏漂移受温度影响大的问题,采用温度补偿方法不可靠。提出一种基于FPGA的模态交换方式来实时自校准陀螺的漂移误差。通过常温零偏实验和变温零偏实验结果表明,陀螺的零偏变化量通过基于FPGA的模态交换技术后能够得到较好的抑制效果,验证了对称壳体振动陀螺模态交换技术在FPGA上实现的可行性,提升了温度稳定性。

The symmetrical shell vibration gyro has the problem that the damping inhomogeneity is difficult to eliminate and bias drift is greatly affected by the temperature,and the temperature compensation method is not reliable.A method of mode reverse for real-time self-calibration gyro bias errors based on the FPGA was proposed.Through room bias temperature and variable temperature bias experiments,it was verified that the bias variation can get a better suppression effect after the mode reverse technology based on FPGA,which verified the feasibility of implementation on FPGA of the mode reverse technology of the symmetrical shell vibration gyro and improved the temperature stability.