  This work proposes a cooperative strategy that employs deviated pursuit
guidance to simultaneously intercept a moving (but not manoeuvring) target. As
opposed to many existing cooperative guidance strategies which use estimates of
time-to-go, based on proportional-navigation guidance, the proposed strategy
uses an exact expression for time-to-go to ensure simultaneous interception.
The guidance design considers nonlinear engagement kinematics, allowing the
proposed strategy to remain effective over a large operating regime. Unlike
existing strategies on simultaneous interception that achieve interception at
the average value of their initial time-to-go estimates, this work provides
flexibility in the choice of impact time. By judiciously choosing the edge
weights of the communication network, a weighted consensus in time-to-go can be
achieved. It has been shown that by allowing an edge weight to be negative,
consensus in time-to-go can even be achieved for an impact time that lies
outside the convex hull of the set of initial time-to-go values of the
individual interceptors. The bounds on such negative weights have been analysed
for some special graphs, using Nyquist criterion. Simulations are provided to
vindicate the efficacy of the proposed strategy.
