光纤陀螺捷联系统划桨补偿算法的改进与优化

The Improvement and Optimization of Sculling Compensation Algorithms for Fiber-optical Gyro SINS

传统的划桨补偿算法采用陀螺和加速度计的增量信号来进行设计,当应用于输出为角速率的干涉型光纤陀螺构成的捷联系统时,需要通过角速率提取角增量,增加了系统设计难度,降低了速度解算精度。因此,优化设计了一种新的划桨补偿算法,它直接利用角速率/比力值以及惯组测量带宽,并给出了算法在划桨运动下的误差表达式。与传统算法比较,新算法具有较高的精度,为改进划桨补偿算法提供了一种新的思路。

Traditional sculling algorithms make use of incremental output of gyros and accelerometers to design algorithms,when they are applied to fiber-optical gyro strap down inertial system,the incremental signals should be simulated by angular rate,which not only increases design difficulty but also reduce calculation accuracy.In view of this,an improved sculling algorithm was proposed,which made use of angular rate/specific force signal directly,and the error formula was derived in the condition of sculling input.Theoretical deduction and simulation results indicate that the precision of improved algorithms is far superior to that of traditional ones.