基于双通道的光纤陀螺捷联罗经系统软件设计

基于双通道（罗经通道和惯导通道）的光纤陀螺捷联罗经系统软件设计，罗经通道通过在水平回路及罗经回路中加阻尼控制环节校正姿态角，当载体进行复杂机动航行时，系统自动切换到无阻尼惯导通道，以有效减小机动误差，并通过等效分析法确定加速度阈值实现两通道的自动切换。两种工作通道的仿真结果表明罗经通道与惯导通道相比，可以更好地抑制系统的舒勒周期振荡和地球周期振荡，对惯性器件的随机噪声产生的误差积累也有较好的抑制作用。通过系统工程样机在三轴转台环境下的测试，基本验证了双通道软件的正确性和系统样机硬件的可靠性，测试结果表明该罗经系统具有较高的姿态精度。

Design of Fiber Optic Gyro Strapdown Compass System Software Based on Dual-channel

Based on dual-channel (compass channel and inertial navigation channel) theory, the software of fiber optic gyro strapdown compass system is designed. In compass channel, the attitude can be corrected through adding damping links to horizontal circuit and compass circuit. If the carrier has a large acceleration, the system will switch to undamped inertial channel automatically to reduce error. Acceleration threshold can be achieved by equivalent analysis method. Simulation results of two working channels show that in compass channel, Schuler oscillation, Earth oscillation and error generated by the accumulation of random noise can be effectively inhibited. Through the test of compass system in a three-axis turntable, the correctness of the software and hardware reliability of compass system are verified, and the results show that the compass system has high precision.