摘要
针对打击机动目标时带攻击角度约束的制导问题,采用扩张状态观测器和动态面控制方法设计一种考虑自动驾驶仪动态特性的制导律.考虑期望视线角的变化率正比于未知的目标加速度,采用扩张状态观测器对未知目标加速度进行估计.为了避免奇异问题,并克服非匹配不确定项对系统性能的影响,采用非奇异终端滑模和动态面控制方法进行制导律设计.与传统的将目标加速度设为零的制导律相比较,仿真结果表明所提出的制导律具有良好的制导性能.
Aiming at the problem of guidance law design for intercepting maneuvering targets with the impact angle constraint, a guidance law is designed considering missile＇s dynamics of the autopilot based on the extended state observer and dynamic surface control methods. Considering that the change rate of the desired line of sight angle is proportional to the unknown target acceleration, the extended state observer is employed to estimate the unknown target acceleration. In order to avoid the singularity problem and eliminate the influence of mismatched uncertainties on the system performance, the nonsingular terminal sliding mode control and dynamic surface control schemes are proposed for the guidance law design. Compared with the traditional guidance law which simply treats the unknown target acceleration as zero, the simulation results show that the proposed guidance law provides better interception performance.
出处
《控制与决策》
EI
CSCD
北大核心
2015年第4期585-592,共8页
Control and Decision
基金
科研基金项目(B212013XXXX)
关键词
非线性制导律
攻击角度约束
动态面控制
扩张状态观测器
机动目标
nonlinear guidance law： impact angle constraint
dynamic surface control
extended state observer
maneuvering target
