That feedback creates a higher order control loop that allows them to perform much better than if they didn't have the feedback. (sciencemag.org)
Design and development of control loops control schemes... (members.climber.com)
This harness features a patented control loop on the back of the harness, which tightens gently around your dog's chest to discourage pulling and makes walking your dog an easy, more enjoyable experience for both of you. (2houndsdesign.com)