This paper addresses the cable tension distributions of a cable-driven parallel robot with non-negligible cable mass for large dimension mechanisms. A well-known model which describes the profile of a cable under the action of its own weight allows us to take the cable sags into account. In addition, an approach to computing the cable tensions is presented, in which there are two major steps to...

In this study, the roof-cutting-type gob-side entry retaining is introduced, and its application in medium-thickness coal seams studied. Based on analysis of construction procedure principle, mechanical model retained roadway structure cantilever beam formed by roof cutting was established, support resistance deformation were obtained. addition, through technological design numerical simulation...

In this study, taking the Sheng’an coal mine as an engineering background, failure characteristics of surrounding rock a roadway under repeated mining in close-distance seam is comprehensively illustrated through field measurements (e.g., drilling imaging), theory analysis and numerical simulation (finite difference method (FDM)). The results show that although return airway 10905 remains intac...

This paper takes the deep foundation pit project of Lanzhou Hospital Traditional Chinese Medicine as background. The design and construction is relatively difficult due to complex environment around pit, dense surrounding buildings, underground soil layer influence groundwater on pit. In order detect problems in process, was monitored real time through an automated monitoring system for whole p...

in wireless sensor networks (wsns), localization algorithms could be range-based or range-free. the approximate point in triangle (apit) is a range-free approach. we propose modification of the apit algorithm and refer as modified-apit. we select suitable triangles with appropriate distance between anchors to reduce pit test errors (edge effect and non-uniform placement of neighbours) in apit a...

Aiming at the problems of difficult support mining roadway under goaf close distance coal seam, obvious large deformation, and long-term continuous deformation surrounding rock, an advanced bolt-grouting system is proposed. The can effectively solve problem from design system, construction monitoring evaluation realize intelligent support. Based on actual engineering background 29204 working fa...

A method for robotized cable winding of the Uppsala University Wave Energy Converter generator stator has previously been presented and validated. The purpose of this study is to present and validate further developments to the method: automated stand-alone equipment for the preparation of the winding cables. The cable preparation consists of three parts: feeding the cable from a drum, forming ...

The cable equation describes the voltage in a straight cylindrical cable, and this model has been employed to model electrical potential in dendrites and axons. However, sometimes this equation might give incorrect predictions for some realistic geometries, in particular when the radius of the cable changes significantly. Cables with a nonconstant radius are important for some phenomena, for ex...