The effect of actuator dynamics on active structural control of offshore wind turbines
The effect of actuator dynamics on active structural control of offshore wind turbines
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DOI：
10.1016/j.engstruct.2011.02.020
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发表时间：
2011-05
影响因子：
5.5
通讯作者：
G. Stewart;M. Lackner
中科院分区：
文献类型：
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作者：
G. Stewart;M. Lackner
在大型风力发电机组中实施主动结构控制时，必须对执行器的动力学模型进行精确建模，才能开发出稳健的控制系统。本文建立了一个有限自由度模型，研究了执行器动力学和控制-结构相互作用对电机性能的影响。为了突出这些影响，对模型进行了频域分析。比较了考虑执行器动力学的主动控制模型与采用理想执行器的主动控制模型的性能。结果表明，当执行器模型更接近实际情况时，负载有所减少，但执行器功率消耗大大增加，使得控制器设计中忽略控制-结构相互作用是不可取的。最后，分析了执行器的机械设计对控制-结构相互作用的影响。结果表明，通过改变执行器的传动比，可以减小控制-结构相互作用的影响。
When implementing active structural control in large scale wind turbines, care must be taken to accurately model the dynamics of the actuator in order to develop a robust control system. In this paper, a limited degree of freedom model is constructed, and the effects of both actuator dynamics and control-structure interaction are investigated for an electric motor. The model is analyzed in the frequency domain in order to highlight these effects. The performance of the active control model considering actuator dynamics is compared to previous work in which an ideal actuator was used. It is demonstrated that while loading is reduced for cases that include a more realistic actuator model, greatly increased actuator power consumption makes neglecting control-structure interaction in controller design undesirable. Finally, the impact of the mechanical design of the actuator on control-structure interaction is analyzed. It is shown that by changing the gear ratio of the actuator, the effects of control-structure interaction can be reduced.