火箭推进

针对现役捆绑火箭在飞行中发生推力突降的问题,提出了一种基于改进单纯形法的控制分配策略。利用故障前后火箭控制力矩相等的思想,将推力下降后火箭发动机摆角的重新分配问题转化为目标函数约束下的线性分配问题,通过改进单纯形法进行了有效求解。结果表明,偏航角在关机故障发生后可以迅速恢复至平衡状态,滚转角在小幅抖震后同样快速到达稳定,该方法可以有效地改善火箭突发推力下降后控制能力减弱的问题,并维持故障后火箭姿态的平稳,对运载火箭姿态重构研究具有理论意义与工程应用价值。

Aiming at the problem of sudden thrust drop for active service strap-on rocket during flight, a control allocation method based on improved simplex method is proposed.Based on the idea that the control torque of the rocket is equal before and after the failure, the redistribution problem of rocket engine swing angle after thrust drop is transformed into a linear distribution problem under the constraint of objective function, which is effectively solved by the improved simplex method.The results show that the yaw angle can quickly return to the equilibrium state after the shutdown failure, and the roll angle can also quickly return to stability after a small buffeting.This algorithm can effectively improve the weakening of the control ability after the sudden thrust drop of the rocket engine, and maintain the stability of the rocket attitude after the failure.The research content has theoretical significance and engineering application value for the attitude reconstruction of launch vehicle.

引言
1 运载火箭推力下降模式分析
2 推力下降后火箭力矩重构方案设计
3 运载火箭重构仿真分析
4 结论

图1 某型号火箭发动机布局示意图<br/>Fig.1 Layout diagram of a certain type of rocket engine

图1 某型号火箭发动机布局示意图
Fig.1 Layout diagram of a certain type of rocket engine

图2 发动机推力下降示意图<br/>Fig.2 Schematic diagram of engine thrust drop

图2 发动机推力下降示意图
Fig.2 Schematic diagram of engine thrust drop

图3 火箭控制系统流程图<br/>Fig.3 Flow chart of rocket control system

图3 火箭控制系统流程图
Fig.3 Flow chart of rocket control system

图4 助推2号发动机关机故障时火箭姿态角变化对比<br/>Fig.4 Comparison of rocket attitude angle change during shutdown failure of No.2 booster's engine

图4 助推2号发动机关机故障时火箭姿态角变化对比
Fig.4 Comparison of rocket attitude angle change during shutdown failure of No.2 booster's engine

图5 关机故障下芯级摆角重分配图<br/>Fig.5 Redistribution diagram of core stage swing angle under shutdown fault

图5 关机故障下芯级摆角重分配图
Fig.5 Redistribution diagram of core stage swing angle under shutdown fault

图6 关机故障下助推摆角重分配图<br/>Fig.6 Redistribution diagram of booster swing angle under shutdown fault

图6 关机故障下助推摆角重分配图
Fig.6 Redistribution diagram of booster swing angle under shutdown fault

图7 重构后的力矩变化图<br/>Fig.7 Torque variation diagram after reconstruction

图7 重构后的力矩变化图
Fig.7 Torque variation diagram after reconstruction

图8 重构后火箭飞行姿态角变化曲线<br/>Fig.8 Variation curves of rocket flight attitude angles after reconstruction

图8 重构后火箭飞行姿态角变化曲线
Fig.8 Variation curves of rocket flight attitude angles after reconstruction

[1] 张鑫伟,付郁.2020年全球航天发射统计分析[J].国际太空,2021(2):18-23.
[2] 夏鲁瑞.液体火箭发动机涡轮泵健康监控关键技术及系统研究[D].长沙:国防科学技术大学,2010.
[3] 龙乐豪.液体弹道导弹与运载火箭系列:总体设计[M].北京:中国宇航出版社,2001.
[4] 曲晶,张绿云.国外火箭发射及故障情况统计分析[J].中国航天,2016(2):13-18.
[5] 马军强,杨思锋,戴芳立.基于RVM的液体火箭发动机试验台故障预测方法[J].火箭推进,2015,41(3):80-86.
[6] 张伟星,李建民,侯文,等.BP神经网络用于火箭增压输送系统故障检测[J].火箭推进,2021,47(5):85-91.
[7] 宋征宇.从准确、精确到精益求精:载人航天推动运载火箭制导方法的发展[J].航天控制,2013,31(1):4-10.
[8] CALISE A J,LEE S,SHARMA M.Development of a reconfigurable flight control law for tailless aircraft[J].Journal of Guidance,Control,and Dynamics,2001,24(5):896-902.
[9] 吴蕾.考虑发动机推力损失的运载火箭容错控制[D].大连:大连理工大学,2019.
[10] BUFFINGTON J M,ENNS D F.Lyapunov stability analysis of daisy chain control allocation[J].Journal of Guidance,Control,and Dynamics,1996,19(6):1226-1230.
[11] 胥彪,周荻.基于反步法及控制分配的导弹直接侧向力/气动力复合控制[J].系统工程与电子技术,2014,36(3):527-531.
[12] DURHAM W C.Constrained control allocation:Three-moment problem[J].Journal of Guidance,Control,and Dynamics,1994,17(2):330-336.
[13] DURHAM W C.Attainable moments for the constrained control allocation problem[J].Journal of Guidance,Control,and Dynamics,1994,17(6):1371-1373.
[14] 杨凌宇,高金源,申功璋.飞行控制中的一种新型最优控制分配方法[J].北京航空航天大学学报,2007,33(5):572-576.
[15] 程堂明,陈宇.适应伺服机构卡死故障的控制指令重分配技术研究[J].导弹与航天运载技术,2017(1):51-55.
[16] 冯昊,李新明,潘豪.大推力运载火箭控制系统控制力重构技术研究[J].载人航天,2012,18(6):75-79.
[17] 贾沛然,陈克俊,何力.远程火箭弹道学[M].长沙:国防科技大学出版社,1993.
[18] 王志祥.推力下降故障下运载火箭轨迹在线生成与姿控系统重构[D].长沙:国防科学技术大学,2016.
[19] ARSHAM H.An algorithm for simplex tableau reduction:The push-to-pull solution strategy[J].Applied Mathematics and Computation,2003,137(2/3):525-547.
[20] 敖特根.单纯形法的产生与发展探析[J].西北大学学报(自然科学版),2012,42(5):861-864.

备注

引言

1 运载火箭推力下降模式分析

2 推力下降后火箭力矩重构方案设计

3 运载火箭重构仿真分析

4 结论

期刊信息