随机荷载作用下结构主动控制的作动器优化配置

针对实际工程结构在持续的环境干扰下的控制问题,提出一种同时选择其作动器数目、位置和控制增益的次优化配置方法。该方法通过不断地从作动器的可选位置中删除对二次型性能泛函最优值贡献最小的可选位置,并同时调节性能泛函中的控制参数,使结构的响应和控制力同时达到其最大值为止。该方法简单易行,计算效率高,避免了复杂的梯度和成本函数计算,适合于实际工程应用。通过对一个多层剪切型框架进行仿真计算,验证了该方法的有效性。

OPTIMAL PLACEMENT OF ACTUATORS FOR STRUCTURE INITIATIVE CONTROL UNDER STOCHASTIC LOAD

In view of the engineering structure control under the continued environment disturbance, this paper presents a suboptimal method for placement, number and gains of actuators in output feedback control systems. In the approach, the candidate actuator locations contributing little to the performance functional optimum values are removed successively until structural response and controlling force reach maximum at the same time by adjusting parameter Q and R. This approach is simple and computationally efficient, avoiding the complex gradient and the costly functional calculations. Finally, this method is validated through an example simulating multilayer shear frame.