建筑结构振动控制的改进滑模砰砰方法

本文将滑模控制和最优控制中的砰砰控制相结合，对建筑结构振动控制的滑模砰砰方法进行了研究。由于在建筑结构中应用的作动器多为液压形式，作动器很难适应正负极限控制力间的快速转换，为此本文给出了改进滑模砰砰控制律，用指数函数代替符号函数。考虑到安装传感器数量的限制，给出了有限状态输出的滑模砰砰控制方法。文中还给出了确定作动器最大控制力的近似方法。算例表明，文中所给出的方法能有效地减小结构地震峰值响应，且具有对结构固有参数变化较好的鲁棒性。改进滑模砰砰控制具有重要的实际应用价值。

MODIFIED SLIDING-MODE BANG-BANG CONTROL FOR SEISMICALLY EXCITED CIVIL STRUCTURES

Based on the sliding-mode control and bang-bang control methods, a sliding-mode bang-bang control (SMBBC) method is presented in this paper. Since servohydraulic actuators are popular control-force delivery devices in actual structural control implementation, which are not suitable for high-speed switching of control-forces in bang-bang control, the modified sliding-mode bang-bang control (MSMBBC) law based on a smooth exponential function instead of sign function is investigated. Likewise, static output SMBBC that utilizes only the measured information from a limited number of sensors without an observer is also presented. Determination of maximum control-forces of actuators is investigated. The performance and robustness of the proposed control methods are studied in numerical simulation. The results demonstrate that the MSMBBC method is a viable and attractive control strategy for application to seismically excited linear structures.