考虑天线罩误差的能观性增强制导律设计方法
A guidance law design method for observability enhancement considering radome errors
徐浩 1陆科林 1符启恩 1张宁2
作者信息
- 1. 东南大学自动化学院,南京 210096
- 2. 北京机电工程研究所,北京 100074
- 折叠
摘要
针对雷达寻的导弹导引头存在天线罩误差,而采用比例导引律的制导系统能观性弱,滤波器难以对误差斜率进行准确估计的问题,提出了一种能观性增强的制导律设计方法.对原始经验格拉姆算法进行改进,构造出可对任意指定时刻的能观性进行定量分析的数值算法,并提出分段连续策略,使其适用于非连续系统的能观性分析问题.根据能观性分析结果,设计了一种增益可变的改进制导律,该制导律不仅保证了制导系统的能观性,而且消除了间歇机动制导系统的滞环与跳变.进一步对制导系统做精确线性化处理,并利用李雅普诺夫理论分析了该系统的稳定性.仿真实验结果表明,相比于传统制导方法,所提出的改进制导方法增强了系统的能观性,能够在导引头受天线罩误差干扰的情况下取得更小的脱靶量.
Abstract
To solve the guidance problem that radome errors exist in radar-homing missile seeker while the error slope cannot be estimated accurately due to the weak observability of the control system with Proportional Navigation Guidance(PNG),a guidance law which can improve observability is proposed.An improved nonlinear numerical algorithm is designed,where observability can be analyzed periodically and quantitatively,and a piecewise continuous strategy is proposed to make it compatible with the observability analysis of discontinuous guidance systems.An improved guidance law with variable gain is designed according to the observability analysis results,which guarantees the observability of the guidance system and eliminates the hysteresis of Adaptive Intermittent Maneuver guidance(AIM).An exact linearization method is applied to the guidance system and the stability of the proposed system is analyzed through Lyapunov theorem.The simulation results show that compared with the traditional guidance method,the improved guidance method can enhance the observability of the guidance system and achieve a smaller miss distance when the seeker is disturbed by radome errors.
关键词
天线罩误差/能观性分析/精确线性化/李雅普诺夫稳定性/脱靶量/状态估计Key words
radome errors/observability analysis/exact linearization/Lyapunov stability/miss dis-tance/state estimation引用本文复制引用
基金项目
国家自然科学基金(62373101)
国家自然科学基金(62073075)
出版年
2024
NETL
NSTL
万方数据