Designing of BF-1 rotors depends upon the principle that the total damping is equal to zero at the point near the stall flutter boundary.
文中提出了实验模型的零阻尼设计原则，描述了失速颤振发生的过程。
By introducing nonlinear damping term, it is proved that all signals in the closed-loop system are globally stable, and the tracking error and the parameter (estimation) error converge to zero.
通过引入非线性阻尼项，保证了闭环系统的所有信号都是全局稳定的，而且跟踪误差及参数估计误差均收敛于零。
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