Generally, the flexible robot system can be modeled as the two-mass system which consists of a motor and load connected by a spring. Thus, its elasticity causes resonance in the system. By using the conventional PID controller, this method cannot perform well in this situation. Much research has proceeded with the aim of reducing vibration. A new effective control method, the resonance ratio co...

In vascular interventional surgery, the virtual reality simulation is indispensable for catheter-based operation system because it provide the surgeon of visual scene between catheter and vascular. However, most VR systems only present the vascular geometry model which indicates vascular is a rigid object. So as to display the deformation of vascular, it is necessary to consider the vascular ph...

This article summarizes the practices of organizing research activities that can improve training international students in Russian universities. The authors analyzed and identified correlation between internal costs development (R&D), equipment university laboratories, number foreigners studying at used methods analysis synthesis a systematic approach to explore experience universities stu...

In this paper,fluidity onset analysis in FG thick-walled spherical tanks under concurrent pressure loading and heat gradient has been presented. Designing thick-walled spherical tanks under pressure as tanks holding fluids under heat loads with high heat gradients require new approaches. Under high internal pressure and high temperature, the tank enters the plastic stage in a part of its thickn...

This paper is devoted to the construction of numerical fluxes for hyperbolic systems. We first present a GFORCE numerical flux, which is a weighted average of the Lax-Friedrichs and Lax-Wendroff fluxes. For the linear advection equation with constant coefficient, the new flux reduces identically to that of the Godunov first order upwind method. Then we incorporate GFORCE in the framework of the...

to investigate the saturation induced collapse deformation behavior of rockfill material, a set of large-scale triaxial tests were conducted in saturated and dry-saturated conditions. specimens were tested under various confining pressures. for dry-saturated tests, specimens were sheared in various stress levels. results of all dry saturated tests indicate a sudden reduction in the specimen vol...

The paper presents the results of studies on influence changing parameters a specialized brushless magne-toelectric motor its characteristics in mode return-rotary motion. frequency dependencies amplitude rotor oscillation angle, effective value stator current, efficiency index operation mode, angular speed oscillations, voltage, total losses are given. dependences resonant mechanical oscillati...

theory, Applied Acoustics, Volume 70, Issue 5, May 2009, Pages 730-736, ISSN 0003-682X, http://dx.doi.org/10.1016/j.apacoust.2008.09.003. 1 Sound transmission prediction by 3-D elasticity theory Changzheng, Steven R. Nutt 1. Department of Chemical Engineering and Materials Science, University of Southern California, 3651 Watt Way, VHE 602, Los Angeles, CA 90089-0241, United States Abstract: The...