CAJ | 학술논문

针对飞行器末制导精度的研究,为提高计算效力,采用Monte-Carlo方法,因计算量大,需要耗费大量机时.为了提高精度分析的效率,运用协方差分析描述函数法,以某飞行器再入制导控制系统纵向通道为背景,分析了几种主要的制导方法误差因素影响下的再入落点偏差,并将计算结果与Monte-Carlo方法的统计结果进行了比较.结果表明在系统数学模型精确的情况下,协方差分析描述函数法仅一次计算便可获得系统全部统计特性,具有计算速度快、计算精度高等优点,在飞行器设计初期的精度分析和最优参数选择中具有一定的应用价值.
침대비행기말제도정도적연구,위제고계산효력,채용Monte-Carlo방법,인계산량대,수요모비대량궤시.위료제고정도분석적효솔,운용협방차분석묘술함수법,이모비행기재입제도공제계통종향통도위배경,분석료궤충주요적제도방법오차인소영향하적재입낙점편차,병장계산결과여Monte-Carlo방법적통계결과진행료비교.결과표명재계통수학모형정학적정황하,협방차분석묘술함수법부일차계산편가획득계통전부통계특성,구유계산속도쾌、계산정도고등우점,재비행기설계초기적정도분석화최우삼수선택중구유일정적응용개치.
To study the terminal guidance accuracy of aircraft,Monte-Carlo was used based on a large mount of simulation experiment,thereby more computation Was needed.To improve the efficiency of accuracy analysis,taking the reentry guidance & control system of certain ballistic missile as an example,this paper analyzed the missile reentry landing error influenced by the proportion term of axial aerodynamic coefficient,atmospheric density error and so on with CADET.The computation result from the statistical outcome of Monte-Carlo was compared.It shown that,given the accurate mathematic model of the system,CADET,which can obtain all the statistical characters in one computation,has the advantage of higher precision and speed. It is valuable in the accuracy analysis and parameter optimization of early design of aircraft.