Flutter is an aeroelastic instability and can lead to destruction of structures, and thus its control is important in engineering. A flutter control problem is classified into fluid–structure–control interaction (FSCI) problems. Conventionally, flutter control has been investigated using simple FSCI models. However, these models are sometimes insufficient because of their many simplifications (e.g., potential flow, simple geometry, small deformation). For control problems with severe nonlinearity, high-fidelity FSCI modeling, where control systems are incorporated into models that couple computational structural dynamics and computational fluid dynamics, may be required. Although high-fidelity modeling has a high computational cost, recent improvements in machine power have made the use of FSCI models feasible. In FSCI analysis, control forces are dealt with as external forces that can be treated implicitly or explicitly. Although the treatment of control forces influences the damping of controlled systems, it has not been discussed in previous studies on FSCI analysis. Furthermore, there has been no study in which high-fidelity FSCI simulations of flutter control problems were conducted. The present study evaluates the difference between the implicit and explicit treatment of control forces using stability analysis. The stability analysis results show that explicit treatment cannot capture the damping of controlled systems, especially for high-order modes. Therefore, implicit treatment is required for FSCI analysis. In numerical examples, we consider flutter of a cantilevered beam in axial flow. Control laws designed using conventional approaches are tested using the developed FSCI analysis. Reasonable results are obtained in terms of the improvement in flutter velocity.

颤振是一种气动弹性不稳定性，会导致结构破坏，因此其控制在工程中很重要。颤振控制问题被分类为流体-结构-控制相互作用（FSCI）问题。传统上，颤振控制已经使用简单的 FSCI 模型进行了研究。然而，这些模型有时是不够的，因为它们有许多简化（例如，势流、简单的几何形状、小变形）。对于具有严重非线性的控制问题，可能需要高保真 FSCI 建模，其中控制系统被整合到耦合计算结构动力学和计算流体动力学的模型中。尽管高保真建模的计算成本很高，但最近机器功率的改进使 FSCI 模型的使用变得可行。在 FSCI 分析中，控制力被视为可以隐式或显式处理的外力。尽管控制力的处理会影响受控系统的阻尼，但在以前的 FSCI 分析研究中没有讨论过。此外，还没有研究对颤振控制问题进行高保真 FSCI 模拟。本研究使用稳定性分析评估控制力的隐式和显式处理之间的差异。稳定性分析结果表明，显式处理不能捕捉受控系统的阻尼，尤其是高阶模态。因此，FSCI 分析需要隐式处理。在数值例子中，我们考虑轴流中悬臂梁的颤振。使用开发的 FSCI 分析测试使用传统方法设计的控制律。在颤振速度的提高方面取得了合理的结果。