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.
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Showing 1 to 20 of 21 for “"Block diagrams"”.
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Quantifying uncertainty in reliability block diagrams
Reliability analysis yields statistically derived technical system performance estimates. Traditional reliability analysis employs classical statistical techniques predicated upon asymptotic properties of large data sets. Not uncommonly, however, medium to small data sets constrain analysis efforts …
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Using -2 as a base for a number system to realize a computer
… realized in an actual computer. Flow charts and block diagrams are used extensively.
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Multi-objective optimisation of safety-critical hierarchical systems
… of that system. In all cases, simple reliability block diagrams with restrictive assumptions, such as failure independence and limited 2-state failure modes, were used for evaluating the reliability of the candidate designs produced by the various algorithms.This thesis argues that a departure …
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Trellis Coded Modulation Schemes Using A New Expanded 16-Dimensional Constant Envelope Quadrature-Quadrature Phase Shift Keying Constellation
… Noise channel by using Matlab's Simulink block diagrams.
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The System Design of a Global Communications System for Military and Commercial use Utilizing High Altitude Unmanned Aerial Vehicles (UAVs) and Terrestrial Local Multipoint Distribution Service (LMDS) Sites
… the UAV. We also present communication equipment block diagrams. Included are technical details on military and commercial geostationary satellites used to link transmissions in the system. Implementation issues in the military system are discussed. Mobility and the effects of vegetation in the …
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Modeling SAR signals and sensors using VHDL
… parameterized VHDL model is constructed from the block diagrams in SPW to generate the test for the VHDL signal processing model under test.
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Adensamento radial de argilas: programação automática e estudo experimental
… the calculation and the number of roots. Block diagrams and listing are presented. The appendix contains examples of application of developed program for different diameter ratios n. Also shown how to extend the program in order to determine pore-water pressure (and degree of …
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Development of a model-based systems engineering architecture for an unmanned cargo spacecraft design
… (ConOps), function breakdown, Functional Flow Block Diagrams (FFBD), function timeline, N2 diagrams, product analysis, and system interface analysis. Lastly, it sets the framework for all system, allocated, derived, and interface requirements.
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Generation of VHDL from conceptual graphs of informal specifications
… structure known as conceptual graphs. Ultimately block diagrams and timing diagrams will be translated as well. The VHDL Linker translates these conceptual graphs into Process Model Graphs (PMGs) and corresponding VHDL code. Once a PMG (and associated VHDL code) has been created it can be edited …
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System variation analysis of MIG welded aluminum structural frames
… is a two step process. First, a system of block diagrams are created to clearly outline ho-v1· variation propagates forward through the system. These block diagram representations are linearized models that map the transformations between the input variations and the output variations of a …
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Back annotation for conceptual structures
… e.g. natural language descriptions, flowcharts, block diagrams, timing diagrams). This thesis describes an interactive tool for validating and correcting formal models acquired from natural language specifications of digital system. Validation is important since the formal models have to be …
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Life extension of structural components via an improved nondestructive testing methodology
… with these techniques consisted of alloy block specimens containing flat bottom hole (FBH) arrays, probability of detection (POD) wedding cake samples, and actual airplane engine components. Results from the sensitivity analyses were compared to current NDT techniques used industrially. An …
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Code Division Multiplexing of Fiber Optic and Microelectromechanical Systems (MEMS) Sensors
… changes in the way we envision the basic block diagrams of communication systems. The importance of multiplexing cannot be overstated. To say that much of the current economic and technological progress worldwide is due in part to mixed-signal communications systems would not be incorrect. …
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Flexible Embedded Control Systems : Design and Implementation
… a system. Control systems are defined using block diagrams and blocks may be added and replaced on-line. The static nature of most embedded control systems makes them very sensitive to changes in the hardware or software configuration. There is rarely any interaction between the control loops …
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An improved reliability assessment of a modular robot controller
… for a robot controller drive system. A function block diagram, highlights the main functions in the drive and their interdependencies. Reliability block diagrams estimate the reliability of controller drive system hardware. Finally, a predictive maintainability model is developed to illustrate …
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Combination of reliability tools and artificial intelligence in a hybrid condition monitoring framework for ship machinery systems
… Failure Modes & Effects Analysis, Reliability Block Diagrams) and data-driven approaches based on artificial neural networks (Self-Organising Maps, Nonlinear Autoregressive, Multilayer Perceptron). The above assist in identifying critical ship machinery systems and components and subsequently …
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Maintenance optimisation for wind turbines.
… and subsystems of the wind turbines. Reliability Block Diagrams are designed using the estimated β and η to model the failures of the wind turbines and of a selected wind farm. The models are simulated to assess and optimise the reliability, availability and maintainability of the wind turbine …
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Model-driven security in service-oriented architectures : leveraging security patterns to transform high-level security requirements to technical policies
… this thesis demonstrates the enhancement of FMC block diagrams with SecureSOA. To enable the model-driven generation of security policies, a domain-independent policy model is introduced in this thesis. This model provides an abstraction layer for security policies. Mappings are used to perform …
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Quantitative modeling and analysis with FMC-QE
… arbitrarily fine-grained hierarchi-cal bipartite diagrams. The hierarchical service request structures are modeled in Entity Relationship Diagrams. The static server structures, divided into logical and real servers, are de-scribed as Block Diagrams. The dynamic behavior and the control structures …
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Experiential learning in control systems laboratories and engineering project management
… software. Some of the common concepts include block diagrams, stability, and PID control. Defining common aspects of undergraduate control systems laboratories enables common development, detailed comparisons, and simplified adaptation of equipment and experiments between campuses and programs. …
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