ATMD-结构带有补偿器的模糊滑模控制

FUZZY SLIDING MODE CONTROL WITH COMPENSATOR FOR ATMD-BUILDING

针对基于指数趋近律的滑模控制算法设计ATMD系统中的主动控制力偏大、控制系统抖振过大等不足,采用一种带有补偿器的滑模控制算法来计算ATMD系统的主动控制力。考虑到外部能量有限问题,引入了相应的饱和控制器。同时,为了减小控制系统的抖振,设计了一种基于模糊自适应调整的滑模控制律。以一个单自由度结构模型为例进行了相应的数值分析,与相应的由未含补偿器的指数趋近律方法设计的ATMD控制系统以及TMD和AMD控制系统的控制效果进行对比来验证所提方法的有效性。

Based on the theories of the sliding mode control, the compensators and the fuzzy logic control, this paper presents a new fuzzy sliding mode control method with a fixed-order compensator for application to seismically excited building structures with an active tuned mass damper （ATMD）. Considering that actuators are always of limited capacity in practice, this paper designs the saturated control law to be used when the needed control force exceeds the maximum control force of an actuator. The major advantages of this method over the conventional sliding mode control method via exponential reaching law are as follows： （i） it makes trade-offs between control efforts and specific response quantities of the structure through the use of linear quadratic optimal control theory, （ii） it can keep the chattering effect sufficiently low through the use of a new fuzzy reaching law. Finally this paper gives numerical simulations for SDOF （Single-Degree-of-Freedom） shear building model with ATMD. The simulation results obtained from the proposed control scheme are compared with those obtained from ATMD system excluding the compensator, the tuned mass damper （TMD） system and active mass damper （AMD） system, which shows preliminarily that the new control method is quite effective.