Abstract:

A novel three dimensional dynamic surface guidance law for intercepting high-speed maneuvering targets is presented accounting for the dynamics of missile’s autopilot and target’s maneuver, which is based on the active disturbance rejection control (ADRC) to estimate and compensate the uncertainties. The threedimensional guidance model considering the dynamics of autopilot is firstly established. To take account of the influence of target’s maneuver and measurement noise, the target’s maneuver and line of sight angular rate are estimated by the extended state observer for further implementation. To avoid the “explosion of terms” caused by traditional back-stepping control, the dynamic surface control method is introduced to design the three-dimensional guidance. Finally, simulation results show the superiority of the proposed guidance law in comparison with the proportional navigation guidance law and dynamic surface guidance under different target’s maneuver circumstances.