Bilateral Teleoperation

Teleoperation where position and force are exchanged in both directions between leader and follower, so the operator feels what the robot touches.

Bilateral teleoperation is a form of leader-follower teleoperation: a human moves a local leader device, a remote follower robot tracks that motion, and the contact forces the follower encounters are sent back to the leader so the operator feels resistance in their hand. Unilateral teleoperation, by contrast, only sends the leader's position to the follower — low-cost leader-follower arm setups like ALOHA work this way. Bilateral teleoperation dates back more than fifty years; its control design has to balance stability and transparency (how closely the operator's sensation matches actually doing the task by hand), and communication latency is the main obstacle. A four-channel architecture exchanges both position and force in both directions, which can in principle keep the two sides synchronized. For data collection, bilateral teleoperation helps a human perform contact-rich tasks like plugging in connectors or wiping surfaces, and records the force signal alongside the demonstration for a policy to learn from — for example, Bi-ACT adds force information on top of the ACT architecture.

ExampleA team at the University of Tsukuba and collaborators used four-channel bilateral control to collect demonstrations for policy training: without force information, the policy could barely pick up small 10–20mm objects; adding force to both the input and output raised the pick success rate to 100%.

Also called

Force-Feedback Teleoperation, Bilateral Control

Related

Teleoperation · Leader-Follower Teleoperation · Haptic Glove · Force Control · Contact-rich Manipulation · Action Chunking with Transformers

Sources

Fast Bilateral Teleoperation and Imitation Learning Using Sensorless Force Control via Accurate Dynamics Model (arXiv 2507.06174)
ALPHA-α and Bi-ACT Are All You Need（大阪大学项目页） (Chinese)

As of

2025-07