Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 75 for “"System modelling"”.
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Boiler system modelling using Flownex®
… objective of this project is to develop a boiler modelling methodology, specifically using Flownex, which is capable of running transient simulations for a large variety of coal-fired boiler designs typically used in Eskom. Flownex has been identified as the key software to accomplish the global …
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On intrinsic uncertainties in earth system modelling
Uncertainties are pervasive in the Earth System modelling. This is not just due to a lack of knowledge about physical processes but has its seeds in intrinsic, i.e. inevitable and irreducible, uncertainties concerning the process of modelling as well. Therefore, it is indispensable to quantify …
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Real-Time Operating System Modelling and Simulation Using SystemC
Increasing system complexity and stringent time-to-market pressure bring challenges to the design productivity of real-time embedded systems. Various System-Level Design (SLD), System-Level Design Languages (SLDL) and Transaction-Level Modelling (TLM) approaches have been proposed as enabling tools …
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Commercial Electric Vehicle Cabin Heating System Modelling and Optimization
… the available driving range. Heat pump (HP) systems provide an energy-efficient alternative to resistive heating by utilizing recovered waste heat. However, their performance remains highly sensitive to the ambient conditions and the availability of recoverable heat, as well as the …
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Advancing Irish energy system modelling to inform residential policy
… sparked a renewed determination to act. Energy Systems Optimisation Models (ESOMs) help guide energy policymaking to meet climate goals. This thesis uses a newly developed ESOM, TIMES Ireland Model (TIM), to explore Ireland’s decarbonisation pathways. TIM incorporates empirical internal …
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Dynamic non-linear system modelling using wavelet-based soft computing techniques
The enormous number of complex systems results in the necessity of high-level and cost-efficient modelling structures for the operators and system designers. Model-based approaches offer a very challenging way to integrate a priori knowledge into the procedure. Soft computing based models in …
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A methodology for engineering design change analysis using system modelling and knowledge management technologies
… It is also identified that there is a lack of systematic method for reusing design knowledge to solve design conflicts. The literature review carried out in this project also confirms that there were no unified and systematic methods proposed to meet these industrial requirements. This thesis …
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A System Modelling Approach to Assessment of Hybrid Water Supply Solutions in eThekwini Municipality
… (maintaining water resources requires healthy ecosystems) is the dual challenge facing South Africa. There is growing recognition of the need for alternative approaches to water management, such as Sustainable Urban Water Management (SUWM). Decentralisation and integration to allow consideration …
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Development of a vehicle robotic driver with intelligent control system modelling for automated standard driving-cycle tests
… driver. The throttle and brake pedals control systems modelling and design for automatic transmission vehicle are implemented, with Fuzzy model reference adaptive control (Fuzzy MRAC) as the main controller. The vehicle model was developed using black-box modelling approach where simulations …
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Study of extended stroke gasoline engines : a thermodynamic system modelling and analysis of improvement in fuel consumption
… (ISFC) and the net indicated efficiency of the system at various speed and load points of operations. The crank train dimensions built by Dr. Matthias Brendel, as part of his Phd dissertation, was used for the purpose of this study. The study indicates that extended stroke operation offers an …
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Connecting the continents. Power system modelling and capacity building for detailed assessments of global power sector decarbonization pathways
… sectors. While completely decarbonised power systems based on very high penetrations of wind and solar energy are desirable, the technical and economic feasibility of power systems mostly or fully based on renewables remains a matter of debate. Furthermore, from a continental or global …
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Thermo-Economic Modelling of Micro-Cogeneration Systems System Design for Sustainable Power Decentralization by Multi-Physics System Modelling and Micro-Cogeneration Systems Performance Analysis for the UK Domestic Housing Sector
… its current form focuses on ICE based micro-CHP systems. In the process of developing the models, new approaches on general system, engine, heat exchanger, and dwelling thermal modelling are being introduced to cater for the special nature of the subject. The developed software is a unique …
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Integration des ruhenden Verkehrs in die Verkehrsangebots- und Verkehrsnachfragemodellierung
… the parking traffic into the traffic demand modelling. Placed at program VISUM served from the PTV AG Karlsruhe for the traffic system modelling and rating, as well as the EVA demand model developed by LOHSE.
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Advanced sensing techniques for active structural acoustic control
… adaptive LMS algorithm. A much lower level of system modelling is required with this method of control in comparison to state feedback control methods. As a result, much of the structural acoustic coupling (i.e. system modelling) must be incorporated into the sensor design.
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Design of a Multiloop Pyroelectric Neutron Generator Control System
… neutron generators are compact, low power systems which may be capable of producing short intense pulses of neutrons from D-D fusion reactions. Initial analysis of pyrofusion dynamics has indicated the potential to manipulate the pulse characteristics through system control. This thesis …
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Stability studies of Sasol Synfuels Transmission and Distribution network under fault conditions and N-1 supply contingency
… and Distribution network when the power system is subjected to fault conditions and N-1 supply contingency conditions. The work provides an overview of the problem of power system stability as well as discussing issues related to the problem of power system stability; which include power …
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Aircraft cruise performance optimization using chattering controls
… Performance is examined by using energy-state modelling to investigate fuel-range optimal trajectories. Chattering controls are considered appropriate when the hodograph is non-convex. Classical steady-state cruise, simple chattering-cruise and the extended chattering-cruise models are studied …
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On data-driven modelling and terminal sliding mode control of dynamic systems with applications
This thesis addresses critical issues in system modelling and control with some applications to robotics and automation. The main content is divided into three parts, namely data-driven identification, fast terminal sliding mode control alongside underactuated crane control, and robotic pointing …
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Mathematical modelling of autophagy pathway.
A system modelling autophagy is a new area of research. Current understanding of each step in this biochemical pathway is limited. The study of this mechanism is interesting in several aspects: autophagy plays an important role in physiological cellular processes, is a survival mechanism under …
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