Fixed-Time Cooperative Guidance Law for Multiple Missiles Against Maneuvering Target

摘要

Based on the proposed fixed time sliding mode disturbance observer, a new distributed cooperative guidance law with impact angle constraint is developed, which can contribute to the study of cooperative interception problem by multi-missile systems. Then, the process of problem research can be roughly divided into two steps. Firstly, to ensure that all missiles' impact time can reach the agreement in finite time, a distributed cooperative guidance law on the line-of-sight(LOS) direction is developed based on the algebraic graph and finite-time consensus theory. In the second part, a newly proposed fixed-time disturbance observer which can estimate the acceleration of target in fixed time is adopted, and the acceleration command in vertical direction of LOS is presented to achieve the desired impact angle. The proposed guidance law only needs to transmit the local neighboring information for multi-missile system. Simulation results for the interception scenario of five missiles intercepting a maneuvering target illustrate the validity of the presented guidance law.