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应用Lyapunov方法分析自旋导弹动态逆控制器鲁棒性

, PP. 132-137

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Abstract:

针对自旋导弹的强非线性特性,设计了二时间尺度分离非线性动态逆控制器.给出了带有气动系数不确定性的控制系统状态空间表达式,利用Lyapunov方法分析了控制器的鲁棒稳定性,并结合舵机性能限幅给出了使系统稳定的内回路时间常数完整边界.通过仿真给出了保证控制系统稳定的气动系数拉偏边界.结果表明当气动系数向使弹体系统静稳定方向拉偏时,内回路时间常数可取范围较大,反之可取范围逐渐减小直至无法使系统稳定;当内、外回路时间常数比例增加时,控制器对气动系数不确定性的敏感度增加.与三回路控制器相比,动态逆控制器鲁棒性较差,但响应的稳定性较好.

References

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