考虑时滞的框架结构控制可靠性研究

提出了一种适合于确定框架结构可靠性计算方法．利用模态变换，把系统变为模态独立的振动方程，根据Field提出的假设，先定义阈值，假设控制后系统响应对阚值的穿阚率服从泊松分布，然后根据各模态的控制结果确定相应的可靠性．最后根据Veneziano提出的方法给出系统的可靠性。本文提出针对框架重点部位的控制输出来确定系统可靠性概念。考虑到实际情况，在控制方法选择针对系统不确定性具有较好控制效果的广义预测控制并考虑时滞影响。本文最后给出了计算实例。

Time-lag control reliability study on frame structures

Reliability of vibration control of frame structures under the action of earthquake can reflect the effect of active control, in the paper, an approach of solving frame structures reliability is presented. The method transformed original system vibration equations into unattached ones by aid of mode transfer, and then according to the Field's supposition, defines outcrossing values and takes the outcrossing rates of controlled system responses as a POSSION distribution, meanwhile, the reliability of all modes can be acquired, and then the system reliability can be gotten by aid of Veneziano's method. In the paper, an idea that the system reliability can be decided by the control outputs on the important parts is presented. Moreover, the generalized predictive control plan which has a better control effect on the uncertainty system is introduced and time lag is considered. At last, a numerical example is presented.