Smart structures: Part II — Hybrid control systems and control strategies

In a companion paper, the writers reviewed significant work done on active and semi-activevibration control of structures performed in the past decade or so. in this paper, journal articles onthe hybrid vibration control of structures and control strategies, published during the same period,are reviewed. they include hybrid mass dampers, semi-active base isolators, actuators with passivedampers, and semi-active tuned liquid column dampers (tlcd) with passive dampers. a key elementin successful implementation of smart structure technology is an effective control algorithm to computethe magnitudes of internal forces to be applied to the structure. various improved or new control strategiesdeveloped for civil structures are reviewed in this paper. they include modified lqr and lqg, neuralnetwork-based, fuzzy logic, sliding mode and wavelet-based controllers. studies on optimum placementof control devices are also summarized