敏捷导弹直接侧向力与气动力复合控制策略

Design of blended lateral thrust and aerodynamic surface control strategy for agile missile

针对直接侧向力与气动力复合控制的敏捷导弹,提出了一种基于自抗扰控制方法和动态控制分配技术的复合控制策略。根据导弹纵向动力学模型设计自抗扰控制器,得到建立导弹攻角所需的期望控制力矩。采用动态控制分配将期望控制力矩映射到空气舵和固体脉冲发动机阵列,从而实现导弹对攻角指令的快速精确跟踪。自抗扰控制器具有对模型参数变化和外部扰动不敏感的特性,适用于敏捷导弹侧向喷流气动干扰较大的情形。动态控制分配技术则可以综合考虑执行机构的动态特性和饱和约束对期望控制力矩进行合理分配。仿真结果表明,本文提出的复合控制策略可以快速跟踪攻角指令,适用于敏捷导弹直接侧向力与气动力复合控制系统设计。

A control strategy was proposed for the agile missile with the blended lateral thrust and aerodynamic surface control based on the active disturbance-rejection control（ADRC） and the dynamic control allocation. An ADRC based controller was designed using the longitudinal dynamic model of the agile missile to obtain the control moment required by the attack angle of the missile. The required control moment are mapped into the respective control commands on the aerodynamic deflector and the thrust engine array using the dynamic control allocation to realize the fast and accurate tracking of the attack angle command of the missile. The ADRC based controller is insentive to the model parameter variation, applicable to the condition of large aerodynamic disturbance of the lateral jet flow of the missile. The dynamic control allocation algorithm can give appropriate allocation between the aerodynamic deflection and the lateral thruster taking into account of the dynamic characteristics and the constraints of both kinds of actuators. The proposed blended control strategy can fast track the attack angle command accurately, providing a basis for the design of agile missile control system with lateral thrust and aerodynamic controls.