A nonlinear controller for flutter suppression: from simulation to wind tunnel testing
A nonlinear controller for flutter suppression: from simulation to wind tunnel testing
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DOI：
10.2514/6.2014-0345
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发表时间：
2014-01
期刊：
影响因子：
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通讯作者：
Andrea Da Ronch;N. D. Tantaroudas;Kenneth Badcock;J. Mottershead
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文献类型：
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作者：
Andrea Da Ronch;N. D. Tantaroudas;Kenneth Badcock;J. Mottershead
研究了风洞翼段颤振抑制和极限环振荡的主动控制问题。非定常空气动力学模型与切片理论和不可压缩二维经典理论Theodorsen。模拟和实验数据之间的稳定性行为实现了良好的相关性。针对某风洞实验台的压陷自由度引入非线性，设计了基于部分反馈线性化的非线性控制器。为了证明线性常规方法的非线性综合的优点，线性控制器实现的非线性系统，表现出极限环振荡以上的线性颤振速度。基于部分反馈线性化的控制器优于基于极点配置的线性控制策略。而反馈线性化允许完全抑制极限环振荡，极点配置未能实现任何显着减少振幅
Active control for flutter suppression and limit cycle oscillation of a wind tunnel wing section is presented. Unsteady aerodynamics is modelled with strip theory and the incompressible two-dimensional classical theory of Theodorsen. A good correlation of the stability behaviour between simulation and experimental data is achieved. The paper focuses on the introduction of a nonlinearity in the plunge degree of freedom of an experimental wind tunnel test rig and the design of a nonlinear controller based on partial feedback linearization. To demonstrate the advantages of the nonlinear synthesis on linear conventional methods, a linear controller is implemented for the nonlinear system that exhibits limit cycle oscillations above the linear flutter speed. The controller based on partial feedback linearization outperforms the linear control strategy based on pole placement. Whereas feedback linearization allows to suppress fully the limit cycle oscillations, the pole placement fails to achieve any significant reduction in amplitudes