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第 8 期                      林晓祥,等: 一种考虑时滞的结构显式最优控制方法                                       1825

              础上,建立了关于时滞最优控制力向量的无约束线                                 time‑delay for control of civil engineering structures[J].
              性二次型优化问题,从而解析地推导了时滞显式最                                 Earthquake  Engineering  and  Structural  Dynamics,
              优控制律,提出了一种考虑时滞的结构显式最优控                                 2000, 29(1): 37‑62.
              制方法。由于在显式表达式中可以方便地考虑时滞                            [11] KWON  W,  PEARSON  A.  Feedback  stabilization  of
                                                                     linear systems with delayed control[J]. IEEE Transac‑
              控制力对任意受控响应的影响,因此时滞显式最优
                                                                     tions on Automatic Control, 1980, 25(2): 266‑269.
              控制律的推导过程无需引入扩维状态向量,且无需
                                                                [12] ARTSTEIN  Z.  Linear  systems  with  delayed  controls:
              求解 Riccati 方程,还可以实现针对任意受控响应的
                                                                     a reduction[J]. IEEE Transactions on Automatic Con‑
              降维控制。数值算例结果表明,采用不考虑时滞的
                                                                     trol, 1982, 27(4): 869‑879.
              显式最优控制方法时,在大部分时滞范围内,结构响
                                                                [13] 蔡国平, 黄金枝 . 时滞线性系统振动主动控制的最优
              应均大幅增加,甚至超过无控时的结构响应,表明时                                化 方 法[J].  上 海 交 通 大 学 学 报 ,  2002,  36(11):
              滞对于主动控制效果具有显著的影响;而采用考虑                                 1596‑1599.
              时滞的显式最优控制方法时,结构响应随着时滞的                                 CAI  Guoping,  HUANG  Jinzhi.  Optimal  control  meth‑
              增加而缓慢增大,在较大的时滞范围内仍然可以获                                 od for linear vibration systems with time delay in control
              得理想的控制效果,验证了本文所提时滞显式最优                                [J]. Journal of Shanghai Jiaotong University, 2002, 36
              控制方法的有效性。                                             (11): 1596‑1599.
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