【摘要】 平台惯导系统由于其精度高的优势,在成熟的军用武器和航天设备中仍占有较高比重。导航计算机的运算能力是影响平台惯导实时性和精度的重要因素。本文对比分析了单、双精度浮点处理器计算特性,研究了其对平台惯导导航计算精度的影响;在此基础上,为提高单精度浮点处理器下平台惯性导航精度,提出了将经纬度分解成全量、大量、小量进行运算的改进计算精度的方法,从导航计算原理角度推导了导航计算中经、纬度的改进计算方法。仿真结果表明:改进后的平台惯导计算算法在单精度浮点处理器下,可以在保证运算实时性的同时,有效提高平台惯导精度,水平定位精度提高两个数量级。更多还原

【Abstract】 The platform inertial navigation system(platform INS) occupies a high proportion in the field of mature military weapons and aerospace equipment based on its high precision.The navigation computer’s operation ability has a great effect on the real-time and precision of the platform INS.This paper comparative analysis the computing property between single and double floating point processors,and their effect on the precision of the platform INS computer.On this basis,in order to improve the precision of the single floating point processor,the longitude and latitude were decomposed into a whole scale,a large scale and a small scale respectively.The improved calculation method of the longitude and latitude were derived from the navigation calculation principle.The simulation results show that the improved platform INS calculation algorithm based on the single floating point processor improve the precision effectively and the horizontal precision was two magnitudes higher.更多还原