Several infrastructures, such as bridges and tunnels, require periodic inspection and repair to prevent collapse. There is a strong demand for practical bridge inspection robots to reduce the cost and time associated with the inspection of bridges by an inspector. Bridge inspection robots are expected to pass through obstacles such as bolted splice part and right-angled routes. The aim of this ...

This paper presents the design optimization of axial flux surface mounted Permanent Magnet Brushless DC motor based on genetic algorithm for an electrical vehicle application. The rating of the motor calculated form vehicle dynamics is 250 W, 150 rpm. The axial flux surface mounted Permanent Magnet Brushless DC (PMBLDC) motor was designed to fit in the rim of the wheel. There are several design...

The issues of filling the information model with data on state wheel-rail tribosystem are considered. “Program for modeling transverse position a wheelset in track” is used, and main modules program described. geometrical parameters contact wheel profile rail obtained. values nominal extreme intermediate positions pair track calculated. displacement track, its slope, width rail, gap between cre...

The United States Army began developing Unmanned Ground Vehicles (UGV) in the early 1900’s. Concurrently, researchers developed and enhanced passenger and commercial ground vehicles. Although significant progress has been made for improving vehicle mobility for all ground vehicles throughout the past century, mobility has lacked a concise mutually agreed definition and analytical standardized c...

We prove that a graph has an r-bounded subdivision of wheel if and only it does not have graph-decomposition locality r width at most two.

INTRODUCTION Surface relief structures at micro and nanoscales are currently focused in different engineering areas. These structures enable special optical, mechanical or chemical properties of the workpiece surfaces. One example is the riblet surface, on which microgrooves are distributed in flow direction. Compared to smooth surfaces ideal riblet structures have been proven to reduce skin fr...

* Corresponding author. Tel.: +1-612-625-2374; fax: +1-612-626-7750. E-mail addresses: [email protected] (A. Drescher), [email protected] (J.P.Hambleton). 1 On modeling a rolling wheel in the presence of plastic deformation as a threeor two-dimensional process J.P. Hambleton and A. Drescher Department of Civil Engineering, University of Minnesota, 500 Pillsbury Drive SE, Minneapolis, MN 55455, US...

The microtopography of a honing wheel surface composed active abrasive grains is the key factor affecting characteristics, and control it sufficient condition to realize high-efficiency precision honing. Based on magnetron sputtering method phase field method, theoretical model cubic boron nitride (CBN) coating formation established. physical vapor deposition (PVD) discrete equation solved by f...

This research is to investigate the dynamic characteristics of the grinding process. A kind of robust grinding wheel reciprocating arrangement is schemed out, which realizes the precise point-grinding machining. The grinding wheel reciprocating movement is driven by a linear motor to replace the traditional crank or hydraulic pressure drive device. Based on the time series method, the modal exp...

Theoretical models for predicting penetration of non-driving (towed) rigid cylindrical wheels rolling on frictional/cohesive soils are presented. The models allow for investigating the influence of soil parameters and wheel geometry on the relationship between the inclined rolling force and wheel sinkage in the presence of permanently formed ruts. The rolling process is simulated numerically in...