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Active aeroelastic control with time delay for targeted flutter modes

机译:主动气动弹性控制,针对目标颤振模式具有时间延迟

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The dynamic behavior of aeroelastic systems is characterized by multiple numbers of modes. Aeroelastic instability, such as flutter, associated with a certain mode can be stabilized by active control through pole placement. However, the controller can influence or may destabilize other aeroelastic modes due to spillover. In this paper, flutter suppression and flutter boundary extension by partial pole placement in an aeroelastic system is presented by active state feedback having a single time delay in the control loop. This allows the control of the desired mode of interest without influencing any other modes. A quadratic partial pole assignment problem with constant time delay is generalized here for the case of asymmetric system matrices. It is shown with a numerical example that with this approach poles associated with a targeted flutter mode can be stabilized without affecting the other aeroelastic modes. The effect of time delay on control gains and incorporation of actuator dynamics in the proposed framework are demonstrated. Posterior stability analysis is briefly presented for estimating the critical time delays for the controlled system. (C) 2015 Elsevier Masson SAS. All rights reserved.
机译:气动弹性系统的动态行为具有多种模式。可以通过通过磁极放置的主动控制来稳定与特定模式相关的气动弹性不稳定性,例如颤动。但是,由于溢出,控制器可能会影响其他气动弹性模式或使其不稳定。在本文中,通过在控制回路中具有单个时间延迟的主动状态反馈,介绍了在气动弹性系统中通过局部磁极放​​置来抑制颤振和扩展颤振边界的方法。这允许控制期望的感兴趣模式而不会影响任何其他模式。对于非对称系统矩阵,这里推广了具有恒定时间延迟的二次部分极点分配问题。通过数值示例显示,通过这种方法,可以稳定与目标扑动模式相关的磁极,而不会影响其他气动弹性模式。演示了时间延迟对控制增益的影响以及所提出框架中执行器动力学的纳入。简要介绍了后稳定性分析,以估计受控系统的关键时间延迟。 (C)2015 Elsevier Masson SAS。版权所有。

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