For　an　AMD　control　system　driven　by　linear　motor,　the　performance　of　directive　force,　feedback　driving　force,　actual　driving　force　and　time　lag　were　tested.　According　to　the　experimental　results　of　constant　directive　force,　the　calculation　formulas　of　ripple　thrust　and　comprehensive　resistance　force　for　AMD　control　system　were　presented　through　defining　friction　force　and　other　factors　expected　for　ripple　thrust　as　comprehensive　resistance　force.　The　performance　test　was　carried　out　for　AMD　control　system　driven　by　linear　motor　under　the　sine　directive　force　with　different　frequencies　and　amplitudes.　The　results　show　that　the　proposed　calculation　formulas　of　ripple　thrust　and　comprehensive　resistance　force　are　adequate　and　the　time　lag　of　AMD　control　system　driven　by　linear　motor　is　5ms,　suggesting　that　the　time-lag　performance　of　AMD　control　system　driven　by　linear　motor　can　meet　the　ms-degree　requirement　of　seismic　and　wind　vibration　control　for　civil　engineering　structures.