A Composite Terminal-Guidance Method Considering No-Fly Zone Avoidance and Impact Angle Constraint

To address the problem of no-fly zone avoidance and impact angle constraint in the terminal-guidance phase, a composite terminal-guidance method is proposed. First, to facilitate the design of the algorithm, the dynamic equations of the missile and no-fly zone model are established. Then, to address the problem of impact angle constraint, the arbitrary time convergent impact angle constrained guidance (ATC-IACG) which enables the impact angel to converge to the desired angle at the specific time is introduced. Traditional ATC-IACG is designed in two-dimensional plane, and this paper extends it to the three-dimensional space. Besides, to address the problem of avoiding the no-fly zone, the interfered fluid dynamical system (IFDS) algorithm is introduced and combined with ATC-IACG, proposing a composite terminal-guidance method considering no-fly zone avoidance and impact angle constraint (ATC-IACG-IFDS) and achieving no-fly zone avoidance and advance convergence of the impact angle in the terminal-guidance phase. At last, the simulation results in this paper verify the effectiveness of the proposed composite terminal-guidance method.