This paper describes friction compensation based control of an industrial pneumatic actuator used for the variable geometry turbocharger (VGT). Adaptive LuGre model for friction has been used in this work. Friction force that is responsible for hysteresis and hunting phenomenon in the position control is compensated with two different control strategies designed to improve low velocity position...

The plunging of a large intruder sphere into a prefluidized granular bed with various constant velocities and various sphere diameters is investigated using a state-of-the-art hybrid discrete particle and immersed boundary method, in which both the gas-induced drag force and the contact force exerted on the intruder can be investigated separately. We investigate low velocities, where velocity d...

A special phonomenon of self-lubrication compensation named hole-wedge effect was found in a bionic porous friction pair, meanwhile the origin and regularity of this effect and its tribological behaviors were discussed in this paper. The process of self-circulating compensation of lubrication was modeled, and taking ferrofluid as lubricant a series of experiments were designed and done. Researc...

Article history: Received 12 October 2013 Received in revised form 24 August 2014 Accepted 28 August 2014 Available online xxxx The mechanics of belt friction before the state of gross slip is considered. The variation of the belt force within the contact region is evaluated based on the assumption of gradual growth of slip from the pull-end to the hold-end of the belt, as the pull force increa...

This paper presents a work in progress dealing with the sensorimotor relation between auditory perception and graphical movements. An experiment where subjects were asked to synchronize their gestures with synthetic friction sounds is presented. A first qualitative analysis enabled to evaluate the influence of di↵erent intrinsic sound parameters on the characteristics of the synchronized gestur...

We report experimental measurements on the rheology of a dry granular material under a weak level of vibration generated by sound injection. First, we measure the drag force exerted on a wire moving in the bulk. We show that when the driving vibration energy is increased, the effective rheology changes drastically: going from a non-linear dynamical friction behavior --weakly increasing with the...

Intracellular transport along cytoskeletal filaments is often mediated by two teams of molecular motors that pull on the same cargo and move in opposite directions along the filaments. We have recently shown theoretically that this bidirectional transport can be understood as a stochastic tug-of-war between the two motor teams. Here, we further develop our theory to investigate the experimental...

Metal forming processes, compared with machining ones, reduce production steps and increase manufacturing speed in addition to saving raw material. In this paper, forming process of column of a steering mechanism is investigated by finite element analyses and experimental tests; and optimum die design parameters are found. Forming process parameters including die opening angle, bearing length, ...

Abstract: The present work is conducted to investigate the effect of texture and carbonate content on internal friction angle of carbonate soils. Carbonate soils are majorly found in the bed of shallow waters and also offshores in tropical regions. Recently there is a huge construction projects including oil and gas extraction platform and facilities, harbors, refineries, huge bridges and ot...

This paper presents the development of an accelerator for the real-time simulation of wheelrail contact laws (Hertz and Fastsim), which would enable the use of hardware-in-the-loop for experimental studies of the latest active control technology for wheelset stabilization and steering. The complex wheel-rail contact laws are implemented using a single FPGA chip that outperforms modern general-p...