We present a mechanism for controlling directed transport of particles in inertia ratchets. We study a parameter regime where two attractors --- each transporting particles in different directions co-exist in phase space; and show that a proper control of direction of transport can be achieved by using adaptive backstepping based synchronisation technique.

PACS numbers: 05.45.Pq, 05.45.Ac, 05.40.Fb, 05.60.Cd