航空计算技术
航空計算技術
항공계산기술
AERONAUTICAL COMPUTER TECHNIQUE
2015年
4期
78-82
,共5页
故障%恢复%航迹匹配%插值
故障%恢複%航跡匹配%插值
고장%회복%항적필배%삽치
fault%recover%match of trace%interpolation
针对箭载计算机可能出现的断电等异常情况,需要设计故障后的导航参数恢复算法以保证导航系统正常运行。对于箭载系统,在故障的短时间内可认为火箭以预定航迹飞行,导航值与航迹值在误差范围内保持一致,因此可以利用先验的弹道数据,选用插值法将其细分,找到故障时刻对应的航迹值,并通过查找故障时间得出故障结束后的航迹值,通过补偿算法得到故障恢复时刻的导航值,完成重定位过程。这种方法误差较小,重定位精度较高。
針對箭載計算機可能齣現的斷電等異常情況,需要設計故障後的導航參數恢複算法以保證導航繫統正常運行。對于箭載繫統,在故障的短時間內可認為火箭以預定航跡飛行,導航值與航跡值在誤差範圍內保持一緻,因此可以利用先驗的彈道數據,選用插值法將其細分,找到故障時刻對應的航跡值,併通過查找故障時間得齣故障結束後的航跡值,通過補償算法得到故障恢複時刻的導航值,完成重定位過程。這種方法誤差較小,重定位精度較高。
침대전재계산궤가능출현적단전등이상정황,수요설계고장후적도항삼수회복산법이보증도항계통정상운행。대우전재계통,재고장적단시간내가인위화전이예정항적비행,도항치여항적치재오차범위내보지일치,인차가이이용선험적탄도수거,선용삽치법장기세분,조도고장시각대응적항적치,병통과사조고장시간득출고장결속후적항적치,통과보상산법득도고장회복시각적도항치,완성중정위과정。저충방법오차교소,중정위정도교고。
The navigation recovery algorithm is designed to ensure the normal operation of navigation sys-tem when a short time for fault occurs to the onboard computer of launch vehicle .For the onboard system of launch vehicle ,the rocket can be regarded to fly as reserved during the short time of fault ,so the priori ballistic data and navigation data are similar within error range ,and the trace data after fault can be found by seeking its segment data .Finally,we can get the navigation data when the system is restarted by using compensation method .