拉索结构具有极高的强度和极轻的重量,而被广泛地应用于工程结构中。但同时由于其柔性大、阻尼小,外部激励或支座移动将极易使拉索产生低频谐振而可能导致破坏性事故发生,故需要有效的方法控制这种横向振动。文章在开环主动控制技术的基础上,提出了闭环轴向主动控制策略。应用线性二次型最优控制方法,达到了抑制拉索振动的目的,并经过逐步迭代计算求解出最优主动控制力。 Cable structure with high strength and light weight, but has been widely used in engineering structures. However, at the same time, due to its high flexibility, small damping, external excitation or bearing movement will easily make the cable produce low-frequency resonance may lead to destructive accidents, so the need for effective ways to control such lateral vibration. Based on the open-loop active control technology, the paper puts forward a closed loop axial active control strategy. Applying the linear quadratic optimal control method, the purpose of restraining the cable vibration is achieved, and the optimal active control force is obtained through iterative calculation.