面向高超声速目标的攻击角约束预设性能制导律OA

To address the requirement of head-on interception against hypersonic vehicles,this paper proposes a sliding mode guidance law with an impact angle constraint based on prescribed performance control.First,sliding mode control is combined with prescribed performance control.By introducing an appointed-time prescribed performance function,the tracking error is ensured to converge to a preset accuracy within the appointed time and predefined performance bounds.Then,an appointed-time reaching law is adopted to ensure the sliding manifold converges to zero in a fixed appointed time.Finally,an extended state observer is employed to estimate unknown target maneuver information,ensuring that the estimation error converges within the prescribed time.Simulation results verify the effectiveness and superiority of the proposed guidance law.