制导航空炸弹变结构控制器设计

VARIABLE STRUCTURE CONTROLLER DESIGN FOR GUIDED BOMB

针对制导航空炸弹的滚转通道，设计了一种具有线性部分变结构控制器。基于弹体模型的时变特性，该控制器首先设计切换函数以确定滑动模态动特性，附加以参数变化范围内的定常模型为对象的线性部分用以控制趋近模态。对某型号制导炸弹设计变结构控制律，仿真结果表明能较好地适应系统的参数变化，提高控制精度，系统具有良好性能。

A design scheme of variable structure control (VSC) with linear part for the roll channel of guided bomb control systems is proposed. Based on the time varying character of the bomb body model, the VSC involves, first, the design of switching function for a desired sliding mode dynamic, and second, the design of linear part to control reaching mode such that the state reaches the switching surface as fast as possible. In the second part, the plant is simplified as a time invariant model to make the design easy. The control law of some type guided bomb is designed, and the simulation results show that this method can adapt to the change of system parameters, improve the accuracy of the control, and the system has good performance.