基于遗传算法策略的含时滞结构振动主动控制研究

RESEARCH ON ACTIVE CONTROL FOR TIME DELAYED STRUCTURE USING MODIFIED GENETIC ALGORITHM

该文提出一种新的含时滞结构振动控制方法——基于遗传算法优化反馈控制增益的控制方法,该方法以时滞微分动力学方程为依据,以遗传算法为优化工具,然后根据特定的优化控制目标实现控制增益的求解。遗传算法优化控制增益的方法具有以下优点:其一,由于优化所得的控制增益充分考虑了时滞对结构振动控制的影响,因而能够有效地解决由于时滞的存在使得结构控制实现困难的问题;其二,控制目标明确,该方法可以根据不同的控制目标,实现该目标下最优的控制效果;最后,通过仿真计算,得出了该方法能够适用于时滞受控系统,而且可以实现不同的控制目标的要求,控制效果显著,具有很好的可靠性。

This paper proposes a novel active control method implemented by using Genetic Algorithm（GA）.Based on the discrete motion equation of a multi-freedom degree system with time delay,the method is to optimize an appropriated controlled gain by using GA.The approach can solve such subsistent problems as effective control for a seismically excited structure with an explicit time delay under an explicit objective.Finally a series of computed results are given to prove that the proposed method is capable of providing a satisfactory control effect with different time delay.