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Related Concept Videos

Cable Subjected to a Distributed Load01:24

Cable Subjected to a Distributed Load

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The analysis of suspension bridges is a complex and critical process that involves multiple factors, including the shape and tension of the main cables. The main cables of suspension bridges are subjected to distributed loads, which result in changes in tensile forces and deformation of the cable. These loads must be carefully considered to ensure that the bridge is safe and capable of supporting the weight of different loads.
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Cable Subjected to Concentrated Loads01:28

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Flexible cables are commonly used in various applications for support and load transmission. Consider a cable fixed at two points and subjected to multiple vertically concentrated loads. Determine the shape of the cable and the tension in each portion of the cable, given the horizontal distances between the loads and supports.
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A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
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Overhead power transmission lines rely on cables to carry electricity across large distances. To ensure the stability and functionality of these lines, it is crucial to understand the shape and tension experienced by the cables under the influence of their weight.
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Primary Distribution01:28

Primary Distribution

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Primary distribution systems deliver electrical power from substations to consumers through various voltage classes, with 15-kV class voltages being predominant among U.S. utilities. Older 2.5- and 5-kV classes are being replaced by 15-kV primaries, while higher 25- to 34.5-kV classes are used in high-density urban areas and rural regions with long feeders. Three-phase, four-wire multigrounded systems are widely employed for balanced power delivery, using the neutral wire as a grounding point.
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Secondary Distribution01:25

Secondary Distribution

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Secondary distribution systems provide electrical energy at the utilization voltage levels from distribution transformers to customer meters. Typical secondary voltages in the United States include 120/240 V for residential use, 208Y/120 V for residential and commercial use, and 480Y/277 V for industrial and high-rise commercial use.
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Updated: Sep 22, 2025

Automated Deployment of an Internet Protocol Telephony Service on Unmanned Aerial Vehicles Using Network Functions Virtualization
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Cable deployment system for unmanned ground vehicle (UGV) mobile microgrids.

John E Naglak1, Caleb Kase1, Max McGinty1

  • 1Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, Houghton, MI, USA.

Hardwarex
|May 24, 2022
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Summary

This study introduces a custom-designed Adjustable Cable Management Mechanism (ACMM) for unmanned ground vehicles (UGVs) to deploy electrical cables. The ACMM offers a compact, low-cost solution for controlled cable management in mobile microgrid applications.

Keywords:
Cable managementElectrical connectionTether

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Area of Science:

  • Robotics and Automation
  • Electrical Engineering
  • Energy Systems

Background:

  • Ad hoc autonomous mobile microgrids require reliable electrical connections between distributed resources.
  • Existing cable deployment systems lack the compactness, low cost, and precision needed for small-scale mobile applications.

Purpose of the Study:

  • To design and build a novel Adjustable Cable Management Mechanism (ACMM) for unmanned ground vehicles (UGVs).
  • To enable controlled cable deployment and retraction for mobile microgrid and robotic tethering applications.

Main Methods:

  • Development of a custom ACMM using Commercial Off-The-Shelf (COTS) components.
  • Focus on achieving a low-cost, compact, and precisely controlled cable management system.
  • Design for powered deployment and retraction of various cable types under moderate loads.

Main Results:

  • Successful creation of a compact and low-cost ACMM.
  • Demonstrated capability for controlled cable deployment and retraction at variable speeds.
  • Enabled various tasks requiring electrical or data cable distribution for small-scale projects.

Conclusions:

  • The developed ACMM addresses the deficiency in commercial options for small-scale, constrained cable deployment.
  • The ACMM facilitates robotic tethering in diverse applications, including steep terrain and microgrid interconnections.
  • Detailed design specifications and calibration instructions are provided for replication.