大长径比导弹两自由度H_∞减振跟踪控制器设计

Two-Degree-of-Freedom H_∞ Controller Design for Vibration Attenuation and Tracking of High Length-to-Diameter Ratio Missile

针对大长径比导弹弹体振动与控制系统耦合产生的气动伺服弹性问题,提出两自由度H∞减振跟踪控制算法.在导弹俯仰通道弹性振动和刚体运动耦合模型的基础上进行控制器设计,把传感器在线输出测量值和参考弹道目标值作为控制器的2个输入,把前两阶弹性模态、跟踪误差和控制量引入到目标函数中,将两自由度控制器的设计问题转化到标准H∞优化框架.仿真结果表明,该方法在实现姿态跟踪的同时,对弹体振动有明显的抑制作用.

For an aeroservoelasticity problem which exists between airframe vibration and control system,a two-degree-of-freedom H∞ control algorithm for attitude tracking and vibration attenuation was proposed.A two-degree-of-freedom controller was designed based on the couple model of rigid motion and elastic vibration.The measurement of sensors and tracking target were taken as two inputs of controller.The first two elastic modes,the attitude tracking error and control amplitude were the control objective.The controller design problem was transformed into the standard H∞ optimization framework.The simulation results show that this algorithm not only can achieve tracking but also suppress elastic vibration.