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Development of a fast and accurate positioning system for barrel wear measurements
Thesis (MEng) -- Stellenbosch University, 2023.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2023
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| _version_ | 1867613917679714304 |
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| access_status_str | Open Access |
| author | Andersen, Eduard Petrus |
| author2 | Schreve, Kristiaan |
| author_browse | Andersen, Eduard Petrus Schreve, Kristiaan |
| author_facet | Schreve, Kristiaan Andersen, Eduard Petrus |
| author_sort | Andersen, Eduard Petrus |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng) -- Stellenbosch University, 2023. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/127035 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:43:46.104Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/127035 Development of a fast and accurate positioning system for barrel wear measurements Andersen, Eduard Petrus Schreve, Kristiaan Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Motor vehicles -- Bodies -- Design and construction Automobiles -- Automatic control Howitzers UCTD Thesis (MEng) -- Stellenbosch University, 2023. ENGLISH SUMMARY: Howitzer gun barrel wear is caused by the normal operation of the guns and is measured as the growth of internal diameter. The amount of wear impacts the ballistic performance of a gun and is used as a metric to determine the remaining life of a barrel. Furthermore, test regulations specify that only barrels within their first quarter of barrel life may be used for ammunition production related tests. This thesis details the design and testing of a fast and accurate positioning device for a barrel erosion research measurement instrument (BERMI). The instrument currently uses a crawler to position itself in the barrel, but this has several drawbacks; the most notable is slow positioning movement. In order to enable a new design, the requirements for barrel wear measurements, in terms of positioning, were characterised. The design of the new positioning system (BERMI 7 Car) focussed on simplicity, robustness, cost, modularity, practicality and serviceability. As such, an all-wheel drive car configuration with no steering ability was developed. The car features the same combination of sensors as the crawler but utilises the available data differently in order to determine position. Testing of the new positioning system required a measurement standard, and a reference measurement technique was established accordingly. The reference measurement was employed to measure barrel length to a high degree of accuracy, quantify the thermal expansion coefficient of the barrel steel and allow comparing the positioning accuracy of the car with that of the crawler. The design of the new positioning system was manufactured and tested for speed and positional accuracy inside the confines of a barrel. Based on the findings, the positioning system enabled barrel measurements to be completed in less than 25% of the current time while slightly improving on accuracy. Shortcomings of the new design are discussed, and possible solutions are provided. AFRIKAANSE OPSOMMING: Artillerie loopslytasie word veroorsaak deur die normale werking van die gewere, en dit word gemeet as die groei van interne diameter. Die hoeveelheid slytasie beinvloed die ballistiese werkverrigting van 'n geweer en word gebruik as 'n manier om die oorblywende leeftyd van 'n loop te bepaal. Verder vereis toets regulasies dat net lope binne hul eerste kwart van loop leeftyd gebruik mag word vir ammunisie produksie verwante toetse. Hierdie tesis beskryf die ontwerp en toets van 'n vinnige en akkurate posisionering toestel vir 'n looperosie-navorsings-en-meetinstrument (BERMI). Die huidige instrument gebruik 'n kruiper om homself in die loop te plaas maar het verskeie nadele; die mees noemenswaardig is stadige posisionering. Ten einde 'n nuwe ontwerp moontlik te maak, is die vereistes vir loopslytasiemetings, in terme van posisionering, gekarakteriseer. Die nuwe ontwerp fokus op eenvoudigheid, robuustheid, koste-besparing, modulariteit, bruikbaarheid en diensbaarheid. Daarom is 'n vierwielaangedrewe kar konfigurasie met geen stuur vermoe ontwikkel. Die kar gebruik dieselfde meting sensors as die huidige stelsel maar gebruik die beskikbare inligting anders om posisie te meet. Toetse van die nuwe ontwerp het 'n meetstandaard vereis, en 'n verwysingsmetingstegniek is as 'n gevolg ontwikkel. Die verwysingsmeting is gebruik om loop lengte tot 'n hoe vlak van akkuraatheid te meet, die termiese uitsettings koeffisient van loopstaal te kwantifiseer asook om die posisionerings akkuraatheid van die kar teenoor die huidige BERMI 7 "Crawler" te vergelyk. Die ontwerp van die nuwe posisioneringstoestel is vervaardig en getoets vir spoed en posisionele akkuraatheid binne die grense van 'n loop. Op grond van die bevindinge het die posisioneringstoestel dit moontlik gemaak om loopmetings in minder as 25% van die huidige tyd te voltooi met 'n klein verbetering in die posisionerings akkuraatheid. Tekortkominge van die nuwe ontwerp word gegee en moontlike oplossings word bespreek. Masters 2023-03-02T07:48:17Z 2023-05-18T07:01:08Z 2023-03-02T07:48:17Z 2023-05-18T07:01:08Z 2023-03 Thesis http://hdl.handle.net/10019.1/127035 en_ZA Stellenbosch University x, 84 pages : illustrations, includes annexures application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Motor vehicles -- Bodies -- Design and construction Automobiles -- Automatic control Howitzers UCTD Andersen, Eduard Petrus Development of a fast and accurate positioning system for barrel wear measurements |
| title | Development of a fast and accurate positioning system for barrel wear measurements |
| title_full | Development of a fast and accurate positioning system for barrel wear measurements |
| title_fullStr | Development of a fast and accurate positioning system for barrel wear measurements |
| title_full_unstemmed | Development of a fast and accurate positioning system for barrel wear measurements |
| title_short | Development of a fast and accurate positioning system for barrel wear measurements |
| title_sort | development of a fast and accurate positioning system for barrel wear measurements |
| topic | Motor vehicles -- Bodies -- Design and construction Automobiles -- Automatic control Howitzers UCTD |
| url | http://hdl.handle.net/10019.1/127035 |
| work_keys_str_mv | AT anderseneduardpetrus developmentofafastandaccuratepositioningsystemforbarrelwearmeasurements |