直接对准算法及遗传算法在SINS初始对准中的应用研究

分析了捷联惯性导航系统（SINS）应用直接对准算法进行初始对准的基本原理，并验证了基于中等精度惯性器件的量测值进行静基座直接对准的可行性。简要介绍了遗传算法（GA）及其搜索过程，提出了根据静基座直接埘准的结果，确定GA遗传空间的方法，并构造了GA的适应度函数。仿真结果表明，与常规滤波算法相比，结合使用直接对准和遗传算法两种方法进行SINS静基座初始对准，不仅大大缩短了对准时间，精度也与其相当。

Study of Direct Alignment Algorithm and Genetic Algorithm Application to SINS Initial Alignment

The paper analysed the basic principle of Direct Alignment Algorithm(DAA) application to Strap-down Inertial Navigation System(SNIS),and it also validated the feasibility of DAA on fixed base based on the measuring value of secondary precision inertial devices.It concisely introduced the Genetic Algorithm(GA) and its searching process,putting forward a method which bases on the results of DAA to fix on the genetic space and constructing a fitness function.The results of emulation prove that compared with ordinary filter algorithm,using the DAA and GA together to SINS initial alignment on the fixed base can reduce the alignment time consumedly and get the comparative precision.