Search results for "Feed forward"
showing 3 items of 33 documents
Smart switching in feedforward control of grip force during manipulation of elastic objects
2017
AbstractSwitching systems are common in artificial control systems. Here, we suggest that the brain adopts a switched feedforward control of grip forces during manipulation of objects. We measured how participants modulated grip force when interacting with soft and rigid virtual springs when stiffness varied nearly continuously between trials. We identified a sudden phase transition between two forms of feedforward control that differed in the timing of the synchronization between the anticipated load force and the applied grip force. The switch occurred several trials after a threshold stiffness level. These results suggest that in the control of grip force, the brain acts as a switching c…
Organizational Legitimacy and Stakeholder Trust in the Organization: A Feed-Forward Relationship
2018
The main goal of this study is to enlarge the understanding of the concept of legitimacy. In recent decades, organizational legitimacy has received a great deal of attention from researchers who have tried to establish how organizations acquire, manage, and use it. However, there is still no conceptual agreement on how organizational legitimacy should be understood and how it can be measured. This reflects the complexity in the literature about understanding this phenomenon and suggests research opportunities. This chapter aims to strengthen the understanding of the role legitimacy plays in organizations by reviewing the related literature and analyzing the relationship between legitimacy a…
Causal analysis of short-term cardiovascular variability: state-dependent contribution of feedback and feedforward mechanisms.
2016
Baroreflex function is usually assessed from spontaneous oscillations of blood pressure (BP) and cardiac RR interval assuming a unidirectional influence from BP to RR. However, the interaction of BP and RR is bidirectionalâRR also influences BP. Novel methods based on the concept of Granger causality were recently developed for separate analysis of feedback (baroreflex) and feedforward (mechanical) interactions between RR and BP. We aimed at assessing the proportion of the two causal directions of the interactions between RR and systolic BP (SBP) oscillations during various conditions, and at comparing causality measures from SBP to RR with baroreflex gain indexes. Arterial BP and ECG sig…