摘要
固体火箭发动机内弹道预示精度对固体导弹或运载火箭方案设计、飞行弹道及安全区精准预示、飞行工况校核确认具有至关重要的作用。传统的内弹道预示方法可以较准确地预示一型发动机的内弹道包络,但无法普适性地对复杂环境剖面下的单台发动机内弹道曲线进行精准预示。针对该问题,提出了基于遗传算法的固体火箭发动机内弹道精准预示自修正方法。根据单台发动机点火后一小段时间(0~t_(1))内采集的压强数据,利用GA遗传算法通过逆向反算得到该台发动机所有未知的内弹道预示参数,然后利用内弹道预示模型正向预示得到该台发动机完整时间域(0~t_(1)~t_(a))的内弹道精准预示数据,实现固体火箭发动机内弹道预示自修正,得到精度更高的内弹道预示曲线。计算结果表明,固体火箭发动机内弹道精准预示自修正方法为固体导弹或运载火箭主动飞行段飞行弹道自主闭环控制提供了数据基础,可大大提高主动段飞行弹道的控制精度,有效弥补了主动飞行段跟踪固定程序角制导模式中飞行弹道受固体火箭发动机内弹道预示精度影响较大的不足。
The prediction accuracy of solid rocket motor(SRM)internal ballistic plays an important role in the design of missiles or launch vehicles,the precision of flight trajectory and safety zone,and the flight condition checking.Traditional prediction methods can calculate the accurate internal ballistic range for a certain type of SRM,but it is powerless for the precise prediction of interior ballistic curves of a given SRM product undergoing complex environmental profile.Accordingly,a kind of self⁃modification method based on GA was proposed to improve the accuracy of internal ballistic prediction.The pressure data measured during the SRM working time scope 0~t_(1) was used to calculate the unknown parameters for internal ballistic prediction,and then the more precise internal ballistic prediction for total working time scope 0~t_(1)~t_(a) was obtained by using these acquired parameters.The results show that the self⁃modification method of internal ballistic prediction for SRM will provide accurate data for the flight trajectory control during the boost phase of ballistic missiles or launch vehicles,being conductive to reduce the influence of internal ballistic prediction accuracy on the flight trajectory.
作者
蒲晓航
李冬
李富贵
蔡强
常浩
PU Xiaohang;LI Dong;LI Fugui;CAI Qiang;CHANG Hao(China Academy of Launch Vehicle Technology,Beijing100076,China)
出处
《固体火箭技术》
CAS
CSCD
北大核心
2021年第6期767-772,共6页
Journal of Solid Rocket Technology
基金
低成本模块化高超声速常规导弹技术(20⁃163⁃16⁃ZD⁃027⁃031⁃01)。
