Anti-windup linear parameter varying control of structural systems with magneto-rheological dampers

摘要

Magneto-rheological (MR) dampers are a family of semi-active devices widely used for vibration attenuation in space and civil engineering structures. In this paper, we study the use of MR dampers for seismic protection of a model two-story structure in the presence of actuation saturation. A modified Bingham model is considered for linear parameter varying (LPV) modeling and control of the system. The main contribution of the paper is the design and experimental validation of a LPV anti-windup compensator to tackle the effect of actuator saturation on the control design performance. The designed LPV anti-windup control scheme is advantageous from the implementation standpoint because it can be considered as an addition to the existing control system. Experimental results demonstrate the ability of the design method to attenuate the effects of seismic excitation by controlling the MR damper and simultaneously avoid the adverse effects of actuator saturation by taking advantage of the designed anti-windup compensator and leading to savings in power consumption.