The Quanser Active Mass Damper (AMD) is a bench-scale model of a tall building equipped with an active damper. It is ideal for studying the dynamic response of tall structures to high winds, seismic ground effects, and other disturbances, and for investigating control techniques to actively dampen the deflection of structures. The damper consists of a motorized linear cart instrumented with an encoder measuring the cart’s displacement. Additionally, the structure is instrumented to measure floor acceleration. The Quanser Active Mass Damper is available in three different configurations: one-floor AMD, two-floor AMD with a single active cart, and two-floor AMD with two active carts. The structures can be mounted on the Quanser Shake Table I-40 (one-floor AMD) or Shake Table II (one- or two-floor AMD).