Motor skills emerge from learning feedforward commands as well as improvements in feedback control. These two components of learning were investigated in a compensatory visuomotor tracking task on a trial-by-trial basis. Between-trial learning was characterized with a state-space model to provide smoothed estimates of feedforward and feedback learning, separable from random fluctuations in moto...

To estimate the contributions of feedforward vs. feedback control systems in speech articulation, we analyzed the correspondence between initial and final kinematics in unperturbed tongue and jaw movements for consonant-vowel (CV) and vowel-consonant (VC) syllables. If movement extents and endpoints are highly predictable from early kinematic information, then the movements were most likely com...

Existing noise reduction techniques for open-fitting hearing aids typically disregard the occurrence of signal leakage through the openfitting, leading to a degraded noise reduction performance. Recent miniaturization advances enable to incorporate an internal microphone in the ear mould, which is able to record this signal leakage. Recently, feedforward and combined feedforward-feedback active...

This contribution is about the combination of a feedforward and a feedback controller and a reduced state observer in order to stabilize the trajectories of a nonlinear plant. Port-Hamiltonian systems provide some special mathematical properties and have turned out beneficial for the stability analysis of nonlinear control systems. The combination of a feedforward and feedback controller allows...

The objective of this research is to discover the rules by which the human nervous system controls the cyclic task of paddle juggling. The existence of separate feedforward and feedback control signals is hypothesized, and the feedforward control system is completely identified using tools from dynamical systems theory. Using this knowledge progress is made in identifying the feedback control s...

This paper propose an adaptive visual servoing method consisting of an on-line estimator of the robot/image Jacobian matrix and a feedback/feedforward controller for uncalibrated camera-manipulator systems. The estimator does not need a priori knowledge on the kinematic structure nor on parameters of the camera-manipulator system. The controller consists of feedforward and feedback terms to mak...

The optimal disturbance rejection control problem is considered for consensus tracking systems affected by external persistent disturbances and noise. Optimal estimated values of system states are obtained by recursive filtering for the multiple autonomous underwater vehicles modeled to multi-agent systems with Kalman filter. Then the feedforward-feedback optimal control law is deduced by solvi...

SUMMARY NetDS is a novel Cytoscape plugin that conveniently simulates dynamics related to robustness, and examines structural properties with respect to feedforward/feedback loops. It can evaluate how robustly a network sustains a stable state against mutations by employing a Boolean network model. In addition, the plugin can examine all feedforward/feedback loops appearing in a network and det...

A design method for a feedback controller with integrated delay-based command shaper is presented in this paper, based on the Smith predictor concept. PosiCast and related input command shapers (ZV, ZVD, EI etc.) are primarily intended as feedforward filters for reference (set point) signals. Nevertheless, due to their superior effectiveness in suppressing vibrations, there is a good motivation...