Here is a biomorphic soft robotic skin with a CPG-based neural controller that enables a hexapod robot to exhibit respiratory-like motions. As the researchers suggest, this was done to improve the robot’s aesthetics and make it more friendly to humans. The below video shows it in action:
[HT: M. B. Christiansen, N. Asawalertsak, C. Danh Do, W. Nantareekurn, A. Rafsanjani, P. Manoonpong, and J. Jørgensen]