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中文摘要：
为了消除运动加速度对捷联罗经系统精度的影响,提出一种基于双系统并行计算思想的捷联罗经系统算法.由于捷联系统使用数学平台替代物理平台,在计算捷联罗经系统的同时并行计算另外一套捷联惯导系统.使用只含低频振荡误差的惯导速度与多普勒计程仪所提供的外速度信息进行一定的综合处理,即可去除多普勒计程仪（DVL）的高频速度误差.优化后的DVL速度即可差分计算出载体的运动加速度,消除运动加速度对罗经系统的影响.采用实际航行试验数据对该算法进行数据仿真,结果表明：提出的算法可以有效地提高捷联罗经系统的姿态精度.
英文摘要：
To eliminate the effect of movement acceleration on strapdown gyrocompass system,an approach for strapdown gyrocompass systems based on double-system technology was proposed.As mathematic platform was used instead of physical platform,in strapdown inertial system,one inertial measurement unit（IMU）was used to calculate a strapdown gyrocompass system and a strapdown inertial navigation system（INS）at the same time.The velocity of INS can be used to eliminate the high-frequency velocity errors of Doppler velocity log（DVL）.Hence,the movement acceleration can be calculated by the optimized velocity and the errors caused by movement acceleration can be eliminated.The sailing data were simulated,and results show that the proposed approach can achieve higher accuracy in the attitude.
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