直升机结构响应的多输入多输出混合控制

对一种综合了自适应前馈与反馈控制的混合控制策略进行了拓展和研究，并将它应用于双频谐振激励下直升机舱座位处多目标点振动的控制仿真。在混合控制策略的实现中，提出了多输入多输出系统的以提高模态阻尼为目标的反馈控制器(AOEF)的型式和设计方法，以及针对闭环控制通道的FXLMS算法。在直升机有限元模型上用2个作动器控制4排座椅处的振动，仿真表明混合控制策略为直升机多通道的振动控制带来了性能上的显提高。

MIMO Hybrid Control of Structural Responses for Helicopter

A MIMO hybrid model of structural response control, which combines adaptive feedforward control and feedback control, was developed and then applied in a helicopter model to eliminate the dual-frequency harmonious vibration at cabin seats. In implementation, an AOEF (Acceleration Output Extended Feedback) controller for the MIMO case was designed to add enough damping to the control path so that the convergence rate of the FXLMS algorithm could be obviously improved. The corresponding FXLMS algorithm for the control path of closed loop was developed also. The numerical results on the finite element model of a helicopter indicated that with hybrid control, responses at four rows of seats could be controlled with two actuators and the adaptive controllers got a quicker convergence rate.