The target motion analysis（TMA） for a moving scanning emitter with known fixed scan rate by a single observer using the time of interception（TOI） measurements only is investigated in this paper.By transforming the...The target motion analysis（TMA） for a moving scanning emitter with known fixed scan rate by a single observer using the time of interception（TOI） measurements only is investigated in this paper.By transforming the TOI of multiple scan cycles into the direction difference of arrival（DDOA） model,the observability analysis for the TMA problem is performed.Some necessary conditions for uniquely identifying the scanning emitter trajectory are obtained.This paper also proposes a weighted instrumental variable（WIV） estimator for the scanning emitter TMA,which does not require any initial solution guess and is closed-form and computationally attractive.More importantly,simulations show that the proposed algorithm can provide estimation mean square error close to the Cramer-Rao lower bound（CRLB） at moderate noise levels with significantly lower estimation bias than the conventional pseudo-linear least square（PLS） estimator.展开更多
This paper presents a finite-time cooperative guidance approach aimed at intercepting maneuverable targets while ensuring that multiple missiles adhere to field-of-view(FOV)constraints throughout the interception proc...This paper presents a finite-time cooperative guidance approach aimed at intercepting maneuverable targets while ensuring that multiple missiles adhere to field-of-view(FOV)constraints throughout the interception process.A model for the missile-target relative motion is constructed,where the FOV constraint is redefined as an asymmetric,time-varying limit on the missile's relative velocity perpendicular to the line-of-sight(LOS)direction.The proposed guidance method is divided into two components:one along the LOS direction and the other perpendicular to it.For the LOS direction,a multi-agent consensus protocol is employed alongside a finite-time disturbance observer,ensuring that the interception timing of multiple missiles converges to a consistent value within a finite period.Perpendicular to the LOS,a finite-time guidance law is formulated using a time-varying asymmetric barrier Lyapunov function(TABLF)combined with adaptive control theory,ensuring that all missiles achieve the desired impact angle while maintaining compliance with the FOV constraints.The finite-time stability of the guidance law is validated using Lyapunov theory.Finally,the effectiveness of the cooperative guidance strategy,including FOV compliance,is demonstrated through numerical simulations.展开更多
基金co-supported by the Shanghai Aerospace Science and Technology Innovation Fund of China(No.SAST2015028)the Equipment Prophecy Fund of China(No.9140A21040115KG01001)
文摘The target motion analysis（TMA） for a moving scanning emitter with known fixed scan rate by a single observer using the time of interception（TOI） measurements only is investigated in this paper.By transforming the TOI of multiple scan cycles into the direction difference of arrival（DDOA） model,the observability analysis for the TMA problem is performed.Some necessary conditions for uniquely identifying the scanning emitter trajectory are obtained.This paper also proposes a weighted instrumental variable（WIV） estimator for the scanning emitter TMA,which does not require any initial solution guess and is closed-form and computationally attractive.More importantly,simulations show that the proposed algorithm can provide estimation mean square error close to the Cramer-Rao lower bound（CRLB） at moderate noise levels with significantly lower estimation bias than the conventional pseudo-linear least square（PLS） estimator.
基金National Natural Science Foundation of China(Grant No.62303380)and the Aeronautical Science Foundation of China(Grant No.201907053001)。
文摘This paper presents a finite-time cooperative guidance approach aimed at intercepting maneuverable targets while ensuring that multiple missiles adhere to field-of-view(FOV)constraints throughout the interception process.A model for the missile-target relative motion is constructed,where the FOV constraint is redefined as an asymmetric,time-varying limit on the missile's relative velocity perpendicular to the line-of-sight(LOS)direction.The proposed guidance method is divided into two components:one along the LOS direction and the other perpendicular to it.For the LOS direction,a multi-agent consensus protocol is employed alongside a finite-time disturbance observer,ensuring that the interception timing of multiple missiles converges to a consistent value within a finite period.Perpendicular to the LOS,a finite-time guidance law is formulated using a time-varying asymmetric barrier Lyapunov function(TABLF)combined with adaptive control theory,ensuring that all missiles achieve the desired impact angle while maintaining compliance with the FOV constraints.The finite-time stability of the guidance law is validated using Lyapunov theory.Finally,the effectiveness of the cooperative guidance strategy,including FOV compliance,is demonstrated through numerical simulations.
