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Evasion and pursuit guidance law against defended target

Chinese Journal of Aeronautics 2017年第6期30卷 1958-1973页

作者： Naiming QI Qilong SUN Jun ZHAO Department of Aerospace Engineering Harbin Institute of Technology 150001 Harbin Heilongjiang China

This paper investigates a new approach for a scenario in which an Attacker attempts to intercept a defended aerial Target. The problem is formulated as a game among three players, an Attacker, a Defender, and a Target, with bounded controls. In the considered pursuit–evasion problem, the Target uses an optimal evasion strategy and the Defender uses an optimal pursuit *** proposed approach focuses on the miss distance as the outcome of the conflict. The infeasible region for the initial Zero-Effort-Miss（ZEM） distance between the Attacker and the Defender, for a scenario in which the Attacker evades the Defender, is analyzed, assuming that the Attacker uses a control effort chosen from the permitted control region. The sufficient conditions are investigated under which, for ideal players, the Attacker can pursue the Target while evading the Defender launched by the Target. The guidance provided on how the Attacker can accomplish the task is divided into two parts. During the final time between the Attacker and the Defender, the Attacker chooses the control effort that guarantees the miss distance, and then uses the optimal pursuit strategy to accomplish the task. The derived guidance law is verified by nonlinear simulation.

关键词： Evasion Pursuit three players Two parts guidance lawZero-effort-miss

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Differential game strategy in three-player evasion and pursuit scenarios

引用

Journal of Systems Engineering and Electronics 2018年第2期29卷 352-366页

作者： SUN Qilong QI Naiming XIAO Longxu LIN Haiqi Department of Aerospace Engineering Harbin Institute of TechnologyHarbin 150001China The Rocket Force Equipment Academy Beijing 100096China

A conflict of three players, including an attacker, a defender, and a target with bounded control is discussed based on the differential game theories in which the target and the defender use an optimal pursuit strategy. The current approach chooses the miss distance as the outcome of the conflict. Different optimal guidance laws are investigated, and feasible conditions are analyzed for the attacker to accomplish an attacking task. For some given conditions, the attacker cannot intercept the target by only using a one-to-one optimal pursuit guidance law; thus, a guidance law for the attacker to reach a critical safe value is ***, the guidance law is divided into two parts. Before the engagement time between the defender and the attacker, the attacker uses this derived guidance law to guarantee that the evasion distance from the defender is safe, and that the zero-effort-miss(ZEM) distance between the attacker and the target is the *** that engagement time, the attacker uses the optimal one-toone guidance law to accomplish the pursuit task. The advantages and limited conditions of these derived guidance laws are also investigated by using nonlinear simulations.

关键词： three players differential game theory zero-effort-miss(ZEM) distance guidance law

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