Improved motor control method with measurements of fiber optics gyro (FOG) for dual-axis rotational inertial navigation system (RINS).

摘要: Benefiting from frame structure, RINS can improve the navigation accuracy by modulating inertial sensor errors with proper rotation scheme. In traditional motor control method, measurements of photoelectric encoder are always adopted to drive measurement unit (IMU) rotate. However, when carrier conducts heading motion, may no longer be zero-mean in coordinate. Meanwhile, some high-speed carriers like aircraft need roll a certain angle balance centrifugal force during which result non-negligible coupling errors, caused FOG installation and scale factor errors. Moreover, error parameters susceptible temperature magnetic field, pre-calibration is time-consuming process difficult completely suppress FOG-related this paper, an improved method proposed address these problems, outer insulate carrier’s motion inner simultaneously achieve rotary modulation on basis insulating motion. The results turntable experiments indicate that performance dual-axis has been significantly over could still maintained even large proving relax requirements for