Cooperative guidance law based on time-varying terminal sliding mode for maneuvering target with unknown uncertainty in simultaneous attack
01 Nov 2020-Journal of The Franklin Institute-engineering and Applied Mathematics (Pergamon)-Vol. 357, Iss: 16, pp 11914-11938
TL;DR: A new guidance law based on time-varying terminal sliding mode to make multi-agent intercept maneuvering target simultaneously and is designed for multi-attackers with different interaction topology, which is suitable for the long distance information communication.
Abstract: In this paper, a new guidance law based on time-varying terminal sliding mode is proposed to make multi-agent intercept maneuvering target simultaneously. The new approach can make more benefits as follows: (1). Distributed cooperation protocol with accurate time-to-go ensures the simultaneous attack task can be solved within finite time. (2). The disturbance observer and the composite cooperative guidance law can settle the coordinated attack problem with target acceleration unknown (that is in accordance with the unknown uncertainty upper bound). (3). The improved terminal sliding mode can maintain the continuity and stability of flight control, and it can eliminate singularity and chattering of sliding mode to some extent. (4). New guidance law is designed for multi-attackers with different interaction topology, which is suitable for the long distance information communication. By comparison, numerical simulations verify the validity and superiority of the proposed method.
Citations
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TL;DR: A three-dimensional robust nonlinear cooperative guidance law for multiple missiles to simultaneously attack a maneuvering target at desired impact angles is proposed and the fixed-time stability is proved through the Lyapunov theory and bi-homogenous property.
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TL;DR: In this article , a fixed-time cooperative guidance law for multiple missiles to simultaneously attack a maneuvering target at desired terminal angles is designed for multiple-missile-assisted interception.
Abstract: In this article, fixed-time cooperative guidance laws are designed for multiple missiles to simultaneously attack a maneuvering target at desired terminal angles. The 3-D guidance commands consist of tangential acceleration along line-of-sight (LOS) direction to achieve a salvo attack and normal acceleration perpendicular to the LOS direction to realize a terminal angle-constrained interception. First, the tangential acceleration is derived from a distributed cooperative protocol to guarantee the fixed-time consensus of impact times for multiple missiles. Second, based on the integral sliding manifold and fixed-time reaching law, the normal acceleration is developed for each missile to converge the LOS angle to the desired value within a fixed time. In particular, the unknown target acceleration components are estimated by fixed-time observers and compensated in the guidance commands. The fixed-time stability of the proposed cooperative guidance law is rigorously proved and the explicit estimate for the convergence time is theoretically provided. Then, the proposed methods are utilized to realize the cooperative mission in the planar guidance scenario. Finally, the effectiveness and advantages of the proposed cooperative guidance laws are demonstrated through numerical simulations with comparative studies.
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TL;DR: In this article, a fixed-time convergent guidance law is presented for the leader to achieve appointed impact time and collision avoidance for leader-following flight vehicles, which consist of one leader with the target seeker and the other seeker-less followers.
Abstract: The problem of cooperative guidance is considered with appointed impact time and collision avoidance for the leader-following flight vehicles, which consist of one leader with the target seeker and the other seeker-less followers. A fixed-time convergent guidance law is presented for the leader to achieve appointed impact time. To guarantee the simultaneous arrival of all the flight vehicles, a cooperative guidance law is proposed to make the follower-leader ranges keep proportional consensus with the range-to-go of leader. A distributed observer is put forward for the followers to estimate the range-to-go of leader. Moreover, the collision avoidance can be reliably fulfilled by the collaborative action of the direction-based and distance-based means.
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TL;DR: In this article , a task coupling based layered cooperative guidance structure is constructed by the leader layer and the follower layer to deal with cooperative guidance problems with multiple task requirements, and the design process and stability analysis of the closed-loop system are given.
3 citations
TL;DR: In this paper, a distributed cooperative midcourse guidance (DCMG) law with communication delay is proposed by combining the cooperative term with a distributed consensus protocol including communication delay under the directed communication topology.
Abstract: The initial conditions of the cooperative terminal guidance law, which are the terminal conditions of the cooperative midcourse guidance, have a greater impact on its cooperation and guidance precision, so it is worthy of investigating the cooperative midcourse guidance. In addition, the problem of communication delay between the network nodes is inevitable and has a greater impact on the cooperative guidance law. To solve the above problems, a novel distributed cooperative midcourse guidance (DCMG) law with communication delay is proposed by combining the cooperative term with a distributed consensus protocol including communication delay under the directed communication topology. Firstly, a DCMG law with communication delay is designed by combining the trajectory shaping guidance with the distributed protocol including communication delay under the directed communication topology; secondly, the consensus of the proposed DCMG law with communication delay under the directed graph is proved; finally, the effectiveness and superiority of the proposed DCMG law are verified by numerical simulations.
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TL;DR: In this article, the authors studied the finite-time consensus tracking control for multi-robot systems with input disturbances on the terminal sliding-mode surface and showed that the proposed error function can be modified to achieve relative state deviation between agents.
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763 citations