H2 Based Acceleration-Strain Feedback Control of Structures Subjected to Seismic Input

For control of seismic responses of structures, in contemporary research, either state feedback (i.e., displacement and velocity at each degree of freedom) or acceleration feedback is used. Even for full state feedback, the states of the system are generally estimated from homogeneous acceleration data as accelerometers do not require a local reference like displacement and velocity sensors. Like accelerometers, strain sensors (such as foil-type strain gauges) also do not require local references. This study considers the fusion of acceleration and strain data for H2 based seismic control of structural systems. A four-story lumped mass shear building model subjected to a seismic input is used to elucidate the efficacy of the proposed control scheme. It has been found that the proposed acceleration-strain feedback algorithm is highly effective for better control of seismic responses of structures.