  We propose predefined-time consensus-based cooperative guidance laws for a
swarm of interceptors to simultaneously capture a target capable of executing
various kinds of motions. Unlike leader-follower cooperative guidance
techniques, the swarm of interceptors has no leader and each interceptor
executes its own guidance command in a distributive fashion, thus obviating the
residency of the mission over a single interceptor. We first design cooperative
guidance commands subject to target's mobility, followed by the same when the
target is stationary, and also account for interceptors' changing topologies.
We further show through rigorous analysis that the proposed cooperative
guidance laws guarantee consensus in the interceptors' time-to-go values within
a predefined-time. The proposed design allows a feasible time of consensus in
time-to-go to be set arbitrarily at will during the design regardless of the
interceptors' initial time-to-go values, thereby ensuring a simultaneous target
interception. We also demonstrate the efficacy of the proposed design via
simulations for interceptors connected over static and dynamic networks.
