Variable-gain control applied to aerodynamic control of bridge deck flutter
Variable-gain control applied to aerodynamic control of bridge deck flutter
复制标题
变增益控制在桥面颤振气动控制中的应用
DOI：
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复制
发表时间：
1996
期刊：
影响因子：
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通讯作者：
Y. Fujino
中科院分区：
文献类型：
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作者：
K. Wilde;Y. Fujino
本文提出了一种抑制特大跨径桥梁颤振的方法。控制系统由主动控制表面组成，通过扭转运动产生稳定的气动力。采用有理函数近似法对作用在桥面上的非定常气动力进行近似，并推导出与频率无关的运动方程。系统对平均风速的依赖性限制了常规恒增益最优反馈控制的应用效率。提出的变增益控制方法提高了系统的控制效果。从数学优化问题出发，推导了输出变增益方法的必要条件。
A method of suppressing flutter of a very long span bridge is presented in this paper. The control system consists of actively controlled surfaces which by torsional movement generate stabilizing aerodynamic forces. The unsteady aerodynamic forces, acting on the bridge deck, are approximated by the rational function approximation and the frequency independent equation of motion is derived. The dependence of the system on mean wind speed limits the efficiency of application of the conventional constant gain optimal feedback control. The improvement in control effectiveness is obtained by proposed variable-gain concept. The output variable-gain approach is formulated in terms of mathematical optimization problem and necessary conditions are derived.