Control of lightly damped, flexible modes in the controller crossover region
Control of lightly damped, flexible modes in the controller crossover region
复制标题
控制器交叉区域中轻阻尼、灵活模式的控制
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
J. Doyle
中科院分区：
文献类型：
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作者：
G. Balas;J. Doyle
许多建议的未来空间结构有紧密的间隔，轻阻尼的柔性模式，必须积极控制，以实现预期的性能目标。这些密集堆积的结构模态需要控制器在模态区域中滚降，这些模态在其阻尼水平、固有频率和/或模态形状中具有一定量的建模误差或不确定性。因此，必须在控制系统的闭环性能水平与其对各种类型的不确定性的鲁棒性之间找到微妙的平衡。针对控制器交叉区域存在不确定性柔性模态的情况，采用结构奇异值（u）控制设计技术，实现了系统的性能和鲁棒性目标。控制器合成的轻阻尼，柔性结构实验与noncollocated传感器和执行器的不确定性建模在实现预期的性能目标所发挥的作用。
Many proposed future space structures have closely spaced, lightly damped flexible modes that must actively be controlled to achieve desired performance objectives. These densely packed structural modes require a controller to roll off in a region of modes that have some amount of modeling error or uncertainty in their damping levels, natural frequencies, and/or mode shapes. Therefore, a delicate balance must be found between the level of closed-loop performance of the control system and its robustness to various types of uncertainty. This paper focuses on using the structured singular value (u) control design technique to achieve performance and robustness objectives in the presences of uncertainty flexible modes in the controller crossover region. Controllers are synthesized for a lightly damped, flexible structure experiment with noncollocated sensors and actuators to show the role played by uncertainty modeling in achieving desired performance objectives.