Kraftfeedback

Kraftfeedback is a term used in some engineering and systems-theory discussions to describe a feedback approach that employs pronounced corrective actions in response to deviations from a target state. The intent is to achieve rapid error reduction and tighter tracking by applying larger control signals as soon as an error is detected.

Design and operation: In kraftfeedback systems, the control law typically uses high gains or forceful actuation. Designers may incorporate model-based predictions, robust or adaptive elements, and safety constraints to limit instability and actuator saturation. The approach can yield fast convergence to setpoints and improved disturbance rejection in certain regimes, but it also increases sensitivity to measurement noise and can lead to overshoot or oscillations if not properly tuned.

Applications and scope: The concept has appeared in practitioner literature and some academic discussions around high-gain control in robotics, mechanical systems, and process control. It is not a standardized methodology with a formal, universally accepted definition, and implementations vary across domains.

Evaluation and limitations: Advantages include rapid correction and improved transient response; limitations include potential instability, actuator saturation, and greater requirements on sensor quality and modeling accuracy. Validation typically involves simulation and careful experimental testing.

See also: feedback control, high-gain control, proportional-derivative control, robust control.