Integrated Guidance and Control of Multiple Interceptor Missiles Based on Improved Distributed Cooperative Control Strategy

ABSTRACT In this study, an improved cooperative integrated guidance and control (IGC) design method is proposed based on distributed networks to address the guidance and control problem of multiple interceptor missiles. An IGC model for a leading interceptor is constructed based on the relative kinematic relations between missiles and a target and the kinematic equations of the missiles in a pitch channel. The unknown disturbances of the model are estimated using a finite-time disturbance observer (FTDO). Then, the control algorithm for the leading interceptor is designed according to the disturbance estimation and nonsingular fast dynamic surface sliding mode control (SMC). To enhance the rate of convergence of the cooperative control commands for the interceptors, an improved cooperative control strategy is proposed based on the leader-follower distributed network. Consequently, the two velocity components of the interceptor in the pitch channel can be obtained, which are subsequently converted to the total velocity and flight path angle commands of the interceptor using kinematic relations. The control algorithm for the following interceptor is similarly designed using an FTDO and dynamic surface SMC. The effectiveness of the improved distributed cooperative control strategy for multiple interceptors is validated through simulations.

摘要
本研究针对多拦截弹的制导控制问题，基于分布式网络（distributed networks）提出一种改进的协同一体化制导与控制（Integrated Guidance and Control, IGC）设计方法。首先，基于导弹与目标间的相对运动关系以及导弹在俯仰通道的运动方程，构建领头拦截弹的IGC模型；针对该模型的未知扰动，采用有限时间扰动观测器（Finite-Time Disturbance Observer, FTDO）进行估计。随后结合扰动估计结果与非奇异快速动态面滑模控制（Sliding Mode Control, SMC），设计领头拦截弹的控制算法。为提升拦截弹协同控制指令的收敛速率，基于领导-跟随分布式网络（leader-follower distributed network）提出改进的协同控制策略。由此可得到拦截弹在俯仰通道的两个速度分量，随后通过运动学关系将其转换为拦截弹的总速度与飞行路径角指令。跟随拦截弹的控制算法同样采用FTDO与动态面滑模控制（SMC）进行设计。最后通过仿真验证了所提改进型分布式协同控制策略在多拦截弹场景下的有效性。