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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Modelling and Fault Detection of an Overhead Travelling Crane System

Sjöberg, Ingrid January 2018 (has links)
Hoists and cranes exist in many contexts around the world, often carrying veryheavy loads. The safety for the user and bystanders is of utmost importance. Thisthesis investigates whether it is possible to perform fault detection on a systemlevel, measuring the inputs and outputs of the system without introducing newsensors. The possibility of detecting dangerous faults while letting safe faultspass is also examined.A mathematical greybox model is developed and the unknown parametersare estimated using data from a labscale test crane. Validation is then performedwith other datasets to check the accuracy of the model. A linear observer of thesystem states is created using the model. Simulated fault injections are made,and different fault detection methods are applied to the residuals created withthe observer. The results show that dangerous faults in the system or the sensorsthemselves are detectable, while safe faults are disregarded in many cases.The idea of performing model-based fault detection from a system point ofview shows potential, and continued investigation is recommended.
2

Vícelodní průmyslová hala / Multibay industrial hall

Hrabovská, Kristýna January 2020 (has links)
The principal aim of this thesis is to design two possible options for the steel structure of a new multibay industrial hall located in Slavkov u Brna. An overhead crane with load capacity of 12.5 metric tons will by situated in one of the bays. The hall has a rectangular shape with dimensions of 63x48 meters, each of the two bays has dimensions of 63x24 meters, a height of 11.5 meters and a saddle roof with an angle of slope 10°. Both of the options have the same layout design, the only difference is that option 1 has columns with truss girders while option 2 has a transversal frame with a haunch. The first option was selected because it is more economical due to material savings and is design developed in a greater detail. The permanent load on the building is considered and includes the weight of the steel structure, panels and the weight of crane runway. The variable load is also considered due to the live load, snow load, wind load, the crane, and their combination. Steel S235 is used as the construction material.
3

Výrobní hala / Assembly hall

Beran, Miroslav January 2019 (has links)
The diploma thesis deals with the design and assessment of the steel supporting structure of the production hall. The transverse dimension of the hall is 21,00 m, the longitudinal dimension is 70,00 m, the height of the hall is 17,56 m. S355 steel is used as the main supporting material. The supporting part of the hall consists of columns on which is placed a truss and two crane tracks at two height levels. Three different types of purlins and pillars are considered in the design of the steel structure. For the selected variant, a static calculation of the main bearing elements, including selected details, is drawn up and drawings are drawn up.

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