We review the state of the art in friction estimation and rendering for haptic interfaces and present a method based on a modified Karnopp friction model. We illustrate some of the advantages of this approach and show how it can be used to create accurate and convincing displays of sliding friction, including pre-sliding displacement and stick-slip behavior. We also present the results of human...

This paper reviews the state of the art knowledge related to critical failure mechanisms in electrostatic microand nano-electromechanical systems (MEMS and NEMS) which are the dielectric charging and stiction. It describes also the recent employed nanoscale characterization techniques for these phenomena based on Kelvin probe force microscopy (KPFM) and force–distance curve measurements. The in...

Stiction is a major failure mode in microelectromechanical systems MEMS . Undesirable stiction, which results from contact between surfaces, threatens the reliability of MEMS severely as it breaks the actuation function of MEMS switches, for example. Although it may be possible to avoid stiction by increasing restoring forces using high spring constants, it follows that the actuation voltage ha...

Valve stiction is an important cause of performance deterioration in control loops of industrial plants; owing to the large number of loops in complex plants and different cause of poor performance, it is important to be able to detect causes and suggest actions to perform in automatic way. The paper examines some recent techniques to detect the presence of valve stiction as root causes of osci...

In remote operation of offshore platforms, real time control systems must be well maintained for efficient and safe operations. Early detection of control and equipment performance degradation is critical and is the foundation for implementing higher level integrated optimization. Poor control performance is usually the result of undetected deterioration in control valves, inadequate performanc...

1. Motivation The performance of manufacturing machines of all sorts depends upon precise control of the position of some sort of end-effector. Mechanical friction has forever been the thorn in the side of the developers of these machines [1,4]. Consider the simplest of all possible cases, the problem of controlling the position of the rigid-body plant shown in Figure 1. Except when the mass m ...

This paper investigates the characteristics of a micro-switch that uses two side electrodes to open normally closed switch. The surround fixed electrode in well-known gap-closing configuration. can switch and be tuned respond appropriately outside forces. combined system dramatically improves control standard In conventional switches, DC voltage above certain value closes To reopen switch, diff...