CAJ | 학술논문

旋转调制方案是决定旋转式惯导系统导航精度的一个重要因素.针对双轴旋转调制惯导系统,为更好地调制各项惯性器件误差,提出了一种改进的十六位置调制方案.该方案不仅能够调制常值零偏、安装误差、对称性标度因数误差、非对称性标度因数误差,还能够有效地减小陀螺安装误差引起的速度和位置误差振荡.仿真结果表明,该方案能够将安装误差引起的速度和位置误差的振荡幅值降低至1/3;在目前的惯性器件水平下,采用该方案能够实现1 n mile/5day的定位精度.
선전조제방안시결정선전식관도계통도항정도적일개중요인소.침대쌍축선전조제관도계통,위경호지조제각항관성기건오차,제출료일충개진적십육위치조제방안.해방안불부능구조제상치령편、안장오차、대칭성표도인수오차、비대칭성표도인수오차,환능구유효지감소타라안장오차인기적속도화위치오차진탕.방진결과표명,해방안능구장안장오차인기적속도화위치오차적진탕폭치강저지1/3;재목전적관성기건수평하,채용해방안능구실현1 n mile/5day적정위정도.
The rotation scheme is an important factor that determines the navigation precision of rotary SINS. In this paper, a sixteen-sequence indexing scheme was put forward to preferably modulate the various inertial instrument errors for dual-axis rotating SINS. This sixteen-sequence scheme is very practical, which can compensate all the drift error, fixing error, scale factor error and non-symmetric scale factor error of inertial elements, and decrease the error oscillation of velocity and locality caused by the gyro’s installation error. The simulation results show that the error oscillation amplitude can be decreased to 1/3, and the navigation precision can achieve 1 n mile/5day under the present level of gyro and accelerometer.