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Uncertainty in a Model with Credit Frictions [PDF]

SSRN Electronic Journal, 2014
This paper investigates the relationship between uncertainty and economic activity in a DSGE model with sticky prices and credit frictions. We analyse the effect of a mean preserving shock to the variance of aggregate total factor productivity (macro uncertainty) and we compare it to the effect of a mean preserving shock to the dispersion of ...
Cesa-Bianchi, Ambrogio, Fernandez-Corugedo, Emilio   +1 more
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Adaptive friction compensation with time-delay friction model

Proceedings of the 4th World Congress on Intelligent Control and Automation (Cat. No.02EX527), 2003
This paper presents a new compensation technique for a time-delay friction model that captures the effect of frictional memory. The proposed control utilizes a proportional-derivative (PD) control structure and an adaptive estimate of the friction force.
K K Tan, S Huang, T H Lee
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A contribution to tire/road friction modeling: From a simplified dynamic frictional contact model to a “Dynamic Friction Tester” model

Wear, 2015
This paper presents a new contribution to model tire/road friction. It proposes a calculation of hysteretic component of the rubber friction based on a simplified viscoelastic-rough contact model. The mechanical behavior of rubber elements is represented through "Kelvin-Voigt" model.
Malal Kane, Veronique Cerezo
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A NEW DYNAMICAL FRICTION MODEL

International Journal of Modern Physics B, 2008
This paper proposed a new dynamical friction model structure which allows accurate modeling both in sliding and presliding regimes. Transition between these two regimes is accomplished without a switching function. In the presliding regime, the model has the characters of a Bouc–Wen model, so it can adapt to various hysteretic behaviors.
Guo, Kejian, Zhang, Xingang, Li, Hongguang, Hua, Hongxing, Meng, Guang   +4 more
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Friction compensation without a friction model

2012 American Control Conference (ACC), 2012
This paper presents the design of a position control system for plants that have nonlinear friction. The approach uses nested integral tracking loops: an inner velocity loop and an outer position loop. An additional component of the proposed approach is the nonstandard use of an observer, or reduced-order observer, in the inner loop to estimate the ...
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ON A MICROSCOPIC MODEL OF VISCOUS FRICTION

Mathematical Models and Methods in Applied Sciences, 2007
We consider a body moving along the x-axis under the action of an external force E and immersed in an infinitely extended perfect gas. We assume the gas to be described by the mean-field approximation and interacting elastically with the body. In this setup, we discuss the following statement: "Let V0 be the initial velocity of the body and V∞ its ...
Silvia Caprino, CAVALLARO, GUIDO, MARCHIORO, Carlo   +2 more
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ON FRICTION COMPENSATION WITHOUT FRICTION MODEL

IFAC Proceedings Volumes, 2002
Abstract This paper presents a new methodology for friction compensation that is not based on any friction model. This is done by using finite-terms Fourier series to approximate the friction term. Updating laws for the coefficients of the series are easily derived from a Lyapunov approach to guarantee asymptotic convergence of the tracking error ...
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Frictional and Non Frictional Unemployment in Models with Matching Frictions [PDF]

, 2013
This paper uses a model with a matching function in the labor market, where matches last for one period, to obtain the amount of frictional and non frictional (rationed/disequilibrium) unemployment for different standard wage-setting rules when there are matching frictions.
José Ramón García Martínez, Valeri Sorolla   +1 more
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Simple model for granular friction

Physical Review E, 1999
We propose a simple phenomenological model to describe the motion of a plate on granular layers pushed at a constant speed. The model contains the order parameter characterizing the transition from a solidlike state to a liquidlike state. The model reproduces the hysteresis in frictional force and the universal profile of the slip velocity, which are ...
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Simple model for dry friction

Physical Review B, 1994
The basis of dry friction is discussed using an independent oscillator model with longitudinal motion. This sample system is treated both numerically and with analytical methods. At vanishing velocity a sliding dry friction force is calculated which is smaller than the pinning force.
, Helman, , Baltensperger, , Holyst
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