一种利用动量轮的弹头姿态控制系统概念研究

对一种以动量轮为执行机构的具有中性静稳定外形的再入弹头姿态控制系统进行了概念研究。从动量矩定理和中性静稳定原理阐述了这种控制方案从理论上是可行的。推导了动量轮控制弹头的姿态动力学方程，并基于分离时间尺度方法设计了姿态控制系统。对该姿态控制系统仿真研究表明：1）姿态角跟踪回路性能良好；2）在不需要太大的动量轮控制输入力矩的情况下，能实现滚动通道稳定控制；3）俯仰和偏航通道的正弦跟踪需要相对较大动量矩的动量轮作为执行机构来实现高精度跟踪控制。

The Conceptional Study of Using Moment Wheels for the Attitude Control of a Warhead

The conceptional study of a moment wheels control system for a reentry warhead of indifferently static stability is presented.The feasibility of this proposal is theoretically demonstrated by momentum theorem and indifferently static stability conception.Then we derived the attitude dynamic equations of the moment wheels controlled warhead,and formalized the attitude control strategy by two time scales approach.Simulation studies indicate the following features:1)the attitude angle velocity control loop has a good tracking performance;2)Small control input values of moment wheels can stabilize the roll channel;3)The sinusoidal trajectory tracking of pitch and yaw channels requires relatively large angular moment wheels to achieve high precision.