Dynamics of a torsional system with harmonically varying dry friction torque

Identification of a system with dry friction

Dynamics of dry friction: A numerical investigation

We perform extended numerical simulation of the dynamics of dry friction, based on a model derived from the phenomenological description proposed by Baumberger et al. @Nature ~London! 367, 544 ~1994!# and Heslot et al. @Phys. Rev. E 49, 4973 ~1994!#. Under a quasistationary approximation, the model is related to the Dieterich-Ruina aging ~or slowness! law, which was introduced by Dieterich @Pur...

Friction Torque Dynamics Associated with Intraseasonal Length-of-Day Variability

This investigation examines the dynamical processes that drive the anomalous friction torque associated with intraseasonal length-of-day fluctuations. Diagnostic analyses with National Centers for Environmental Protection– National Center for Atmospheric Research reanalysis and National Oceanic and Atmospheric Administration outgoing longwave radiation data are performed. The approach adopted i...

Torque Feedback Control of Dry Friction Clutches for a Dissipative Passive Haptic Interface

The control of a passive dissipative haptic interface using electromagnetic dry friction clutches as actuators is considered. The performance of the device is currently limited by actuator performance. A dynamic simulation of the system indicates that actuator torque may be better controlled with torque feedback, resulting in improved path-following performance of the haptic interface. Experime...

Control of Mechanical Systems with Dry Friction

A technique to design a dynamic continuous controller to regulate a class of full-actuated mechanical systems with dry friction is proposed. It is shown that the control eliminates the steady-state error and is robust with respect to parameter uncertainties. A simple method to find the parameters of the controller is also proposed. Moreover, an application of this result to control a 2-DOF unde...