  A cooperative salvo strategy is proposed in this paper which achieves
consensus among the interceptors within a pre-defined arbitrary settling time.
Considering non-linear engagement kinematics and a system lag to capture the
effect of interceptor autopilot as present in realistic interception scenarios,
the guidance schemes use the time-to-go estimates of the interceptors in order
to achieve simultaneous interception of a stationary target at a pre-determined
impact time. The guidance scheme ensures that consensus among the time-to-go
estimates of the interceptors is achieved within a settling time whose upper
bound can be pre-specified arbitrarily independent of the initial conditions or
design parameters. The efficacy of the proposed guidance strategy is
demonstrated using numerical simulations with varied conditions of initial
position, velocities and heading angle errors of the interceptors as well as
different desired impact times.
