直接型模糊自适应滑模控制在智能减振结构中的应用

在智能减振结构中,需要控制器有很好的鲁棒性,以保证在结构参数发生变化的情况下仍可以获得理想的控制结果。简单模糊逻辑控制在系统结构参数变化比较大的情况下,其鲁棒性能比较差。引入滑模控制的思想,把基本控制量分为等效控制量和开关控制量,并同时用两个模糊逻辑进行近似逼近,自适应率的设计保证了系统的稳定性,从而建立了直接型模糊自适应滑模控制。通过和简单模糊控制的控制结果比较,验证了直接型模糊自适应滑模控制在智能减振系统中的有效性。

ACTIVE VIBRATION CONTROL USING DIRECT ADAPTIVE FUZZY SLIDING MODE CONTROLLER

In the smart structures with vibration suppression function, robustness of the controller is important to ensure the ideal result when the parameters of the structures vary. The simple fuzzy logic controller can not maintain the good control result when the structures vary greatly. With the idea of the sliding mode control, a direct adaptive fuzzy sliding mode controller is designed. The basic control is divided into an equivalent control and a switch control, which are approximated by two sets of the fuzzy logic separately; and the adaptive laws are designed to ensure the system's stability. The comparison results show the effectiveness of the direct adaptive fuzzy sliding mode controller on smart structures.