基于滚仰式导引头的有限时间收敛导引律设计  

Guidance Law Design Based on Roll-Pitch Seeker Finite-Time Convergence

作　　者：周帆 吕芳 陈炜 王洋 ZHOU Fan, LU Fang, CHEN Wei,WANG Yang(Xi＇an Modern Control Technology Research Institute, Xi＇an Shaanxi 710065, China)

机构地区：[1]西安现代控制技术研究所,陕西西安710065

出　　处：《计算机仿真》2018年第10期62-65,77,共5页Computer Simulation

摘　　要：针对导弹末制导阶段导引律设计问题,提出了一种基于滚仰式导引头的有限时间稳定导引律(FTS)设计方法。首先,在滚仰光轴坐标系下建立了导弹与目标的相对运动模型。其次,基于有限时间收敛理论,设计了基于滚仰式导引头的有限时间收敛导引律。基于有限时间收敛理论,设计的导引律能够保证在末制导结束前视线角速率稳定收敛到原点或者原点附近的一个极小领域内。同时,考虑到有限时间控制系统在离原点较远处状态趋近平衡点速度慢的特点,在导引律中引入了线性状态反馈项来改善闭环系统的收敛性能。最后,通过仿真验证说明了设计方法的有效性,同时与传统比例导引律(PN)进行了对比仿真,进而说明了基于滚仰式导引头设计的有限时间稳定导引律的优良性能。Finite - time stabilization （FFS） guidance law, which is based on the Roll - pitch seeker, was researched to tackle the application of the Roll - pitch seeker in guidance and control system for missile by ensuring the stable convergence of the line of sight rate to zero in finite time. First, according to the theory of finite - time stabilization, the finite - time stabilization terminal guidance law based on roll - pitch seeker was designed through establishing the relative movement relationship model between missile and target on the roll - pitch coordinate system. Then, considering that states of finite - time control systems usually approach an equilibrium point in a slow rate when states are far from the origin, to this end, a linear state - feedback term was introduced in the controller to improve the convergence performance of the closed loop system. The better performances and research value of finite - time stabiliza- tion terminal guidance law was presented by comparing with the proportional guidance law.

关 键 词：滚仰式导引头 有限时间稳定 制导律 视线角速度 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]