基于降阶ESO的微小型空地导弹滚转变结构控制

Composite Variable Structure Roll Control of Miniature Guided Missile Based on Reduce-Order ESO

随着微机电技术迅速发展,现代及未来战场无人机携带攻击性微小型空地导弹作战已成趋势。为了满足复杂的作战环境及大范围投弹包络,提出了采用降阶ESO结合滑模变结构的复合控制方法实现对导弹滚转姿态的稳定控制,从而进一步提高制导精度和打击能力。首先,选取非奇异滑模面设计变结构控制器;通过采用降阶ESO对系统的内、外部总和扰动及不确定项进行实时估计,并前馈补偿到控制输入端;其次,引入超螺旋算法处理输入信号,既能得到控制量所需的信号微分,也能对输入信号进行滤波。最后,通过分析证明其闭环稳定性及有限时间收敛。仿真结果表明:该复合控制方法能快速且稳定跟踪指令信号,抗干扰能力及鲁棒性上都得到了提高,具有不错的控制品质。

With the rapid development of microcomputer technology, the UAV starts to carry miniature mis- siles in the modern and future battlefield. In order to deal with t＇he complex flight environment and a wide range of projectile envelops, a composite control scheme is proposed, which is based on reduced-order extend- ed state observer and sliding mode control to realize the stable control of rolling attitude of the missile and thus further improves the guidance precision and strike capability. Firstly, the nonsingular terminal sliding surface is applied to a variable structure controller design, and estimated total disturbance value by output of ESO /s used in the feedforward compensation design. Then, the super-spiral algorithm is used to deal with input signals as a filter and a differentiator. Finally, the stability of the closed-loop control system and fi- nite-time convergence are proven respectively. The simulation results show that this designed control system represents more excellent control characteristics.