Browsing Theses and Dissertations (Mechanical and Aeronautical Engineering) by Supervisor "Heyns, P.S. (Philippus Stephanus)"
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Browsing Theses and Dissertations (Mechanical and Aeronautical Engineering) by Supervisor "Heyns, P.S. (Philippus Stephanus)"
Now showing items 1-20 of 79
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(University of Pretoria, 2014)Diagnostics and prognostics in rotating machinery is a subject of much on-going research. There are three approaches to diagnostics and prognostics. These include experience-based approaches, data-driven techniques and ...
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(University of Pretoria, 2014)Iterative learning control (ILC) is a repetitive control scheme that uses a learning capability to improve the tracking accuracy of a desired test system output over repeated test trials. ILC is sometimes used in response ...
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(University of Pretoria, 2010-09-13)The on-line condition monitoring of turbomachinery blades is of utmost importance to ensure the long term health and availability of such machines and as such has been an area of study since the late 1960s. As a result a ...
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(University of Pretoria, 2011-10-17)Conventional rotating machine vibration monitoring techniques are based on the assumption that changes in the measured structural response are caused by deterioration in the condition of the rotating machine. However, due ...
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(University of Pretoria, 2007-01-12)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2007-02-01)The problem of vibration induced structural faults has been a real one in engineering over the years. If left unchecked it has led to the unexpected failures of so many structures. Needless to say, this has caused both ...
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(University of Pretoria, 2020)This dissertation presents an approach to use blade tip timing measurements with finite element analysis to predict the fatigue life of a low pressure steam turbine last stage blade under high backpressure and low flow ...
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(University of Pretoria, 2017)This dissertation presents research and experimental work done to characterize the core and winding vibrations of power transformers with regulator windings by measuring the tank vibrations. The experimental tests were ...
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(University of Pretoria, 2017)In 2012, the National Non-Revenue Water assessment revealed that South Africa has 37% of non-revenue water. With the steadily growing demand for this scarce resource, the detection of leaks in pipe networks is becoming ...
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(University of Pretoria, 2005)Conventional gearbox vibration monitoring techniques are based on the assumption that changes in the measured structural response are caused by deterioration in the condition of the gears in the gearbox. However, this ...
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(University of Pretoria, 2016)Condition monitoring is very important for critical assets such as gearboxes used in the power and mining industries. Fluctuating operating conditions are inevitable for wind turbines and mining machines such as bucket ...
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Damage detection methodology for composite UAV wings using modal analysis and probabilistic concepts (University of Pretoria, 2011)Monitoring of structural integrity is critical in many fields today, and particularly so in the civil, mechanical and aerospace engineering industries. In the aerospace industry, appreciably sized and almost exclusively ...
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A deep learning approach towards diagnostics of bearings operating under non-stationary conditions (University of Pretoria, 2019)Faults in bearings usually manifest as marginal defects that intensify over time, allowing for well-informed preventative actions with early Fault Detection and Diagnosis (FDD) protocols. Detection of the fault begins with ...
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(University of Pretoria, 2018)This dissertation is a study on estimating degradation of high energy steam pipework using modern machine learning techniques. High energy piping systems are very complex to simulate due to the many variables that could ...
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(University of Pretoria, 2017)This dissertation describes research and experimental work done to improve the accuracy and applicability of capacitive sensors which are used to evaluate the mass flow rate of solid material within pneumatic conveying ...
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(University of Pretoria, 2006)The implementation of finite element methods (FEM) for fatigue analysis of complex structures in industry are becoming an increasingly effective and accepted practice. In the case of large plate-like structures, such as ...
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(University of Pretoria, 2014)A market for a low-cost vibration protection device in the rotating machine industry has been identified that satisfies the needs of small firms unable to afford and sustain a condition monitoring operation. In this ...
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(University of Pretoria, 2009)In recent years more emphasis has been placed on in-situ condition based monitoring of engineering systems and structures. Aerospace components are manufactured from composite materials more often. Structural health ...
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(University of Pretoria, 2006-09-23)Vibrating machinery like rock drills and compactors are becoming more prominent in modem industry. The vibrations of these machines can damage surrounding structures and foundations and be harmful to their operators. Hand ...
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(University of Pretoria, 2006-12-20)High levels of vibration are essential for the proper operation of vibrating screens. However, this motion imparts high dynamic loads on their support structures leading to premature failure or costly construction. Various ...
Now showing items 1-20 of 79