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Improved Fixed-Time Convergence guidance scheme Design and Its Application to Missile

guidance, Navigation and Control 2023年第4期3卷 85-110页

作者： Lei Cui Kang Zhang Xijing Hu Zhe Li Jianying Yang Nan Jin Department of Automation Tianjin University Tianjin 300072P.R.China Beijing Institute of Control and Electronic Technology Beijing 100045 P.R.China Department of Mechanics and Engineering Science Peking University Beijing 100871P.R.China CASIC Research Institute of Intelligent Decision Engineering Beijing 100074 P.R.China

This study presents a fixed-time convergence guidance scheme for impact time and angle ***,two improved fixed-time stable systems are presented,which have smaller initial control command and better terminal convergence.16 An improved fixed-time extended state observer is proposed to provide accurate estimation of system states and disturbance,which effectively solves peaking value ***,an improved fixed-time sliding mode controller is derived,which avoids the singular problem and achieves faster convergence rate with smaller initial control ***,a new guidance scheme with impact angle and impact time constraints is proposed for intercepting a stationary *** introducing a virtual target,the guidance process is divided into two *** proposed fixed-time controller is employed in the first *** method with a virtual leader ensures that the missile intercept the virtual target with desired line-of-sight angles at a specific *** using the proportional navigation guidance law,the missile keeps travelling with desired flight-path angles to hit the real target in the second stage,17 so as to achieve the impact time and angle ***,the feasibility and effectiveness of the proposed guidance scheme in different engagement scenarios are verified by numerical simulations with comparisons.

关键词： Fixed-time stable sliding mode control extended state observer guidance scheme impact time and angle control

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Systematic Direct Approach for Optimizing Continuous-thrust Earth-orbit Transfers

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Chinese Journal of Aeronautics 2009年第1期22卷 56-69页

作者：高扬李卫琪中国科学院光电研究院 100190 北京航空航天大学自动化学院 100191

This article presents a systematic direct approach to carry out effective optimization of a wide range of continuous-thrust Earth-orbit transfers with intermediate-level thrust acceleration,including minimum-time (with a single burn arc) and mini-mum-fuel (with multiple burn arcs) transfers. With direct control parameterization,in which the control steering programs of burn arcs are interpolated through a finite number of nodes,the optimal control problem is converted into the parameter optimi-zation proble...

关键词： low-thrust orbital transfer optimization multiple shooting variable specific impulse guidance scheme model pre-dictive control

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Fixed-Time Cooperative guidance for Salvo Attack: A Leader-Followers Approach

Fixed-Time Cooperative Guidance for Salvo Attack: A Leader-F...

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第40届中国控制会议

作者： Nan Jin Lei Cui Zhiqiang Zuo Song Wang School of Electrical and Information Engineering Tianjin University School of Information and Communication Engineering Harbin Engineering University

In this paper, a fixed-time salvo attack guidance scheme with impact angle constraint on maneuvering target is proposed for multiple missiles by using the cooperative control strategy. A fixed-time extended state observer is introduced to accurately estimate the target accelerations. The proposed guidance scheme is divided into parts, that is, the guidance law on the normal direction of the line of sight（LOS） and that along the LOS direction, of which the former one ensures the LOS angle converge to the desired value in fixed-time, and the latter one ensures the relative range consensus error converges to origin in fixed time, so as to achieve the salvo attack. Simulation results are given to demonstrate the effectiveness of the proposed scheme.

关键词： Salvo attack guidance scheme Impact angle constraint Extended state observer Leader-follower

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