an magnetorheological damper useful in structural vibration control has a damper body and a moveable portion relative to the damper body . the damper includes an magnetorheological material contained within the damper body for resisting movement of the moveable portion . rheology changes can be generated in the magnetorheological material owing to changes in a magnetic field , to which the magnetorheological material is exposed . the damper further includes at least a sensor embedded in the damper for monitoring an external force exerted on the damper , and for generating a signal to control the magnetic field and hence the resulting yield force and rheological damping of the damper in response to a variance in the external force .