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 53 for “"Steady-state performance"”.
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Steady state performance of an elastic flexible wing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Design and steady-state analysis of the switched reluctance motor drive
… of the machine, even the prediction of the steady-state performance of the drive has been difficult. In the attempt to overcome the nonlinearity problem, researchers have resorted to computer solutions. The Finite Element Analysis (FEA) method has been used to predict the steady state …
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L1 adaptive control augmentation system for the X-48B Aircraft
… Wing Body aircraft. We explicitly verify the performance bounds of the adaptive flight control system at various flight conditions. We demonstrate that the resulting L1 adaptive controller does not require tuning or redesign from one flight condition to another. Furthermore, once designed …
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Ergonomic Responses to Aerobic Steady-State Walking and Running Performance in Children
… determine the metabolic responses of children to steady-state exercise. The purposes of this study were to determine: 1) the relationship between submaximal exercise heart rate and perceived exertion scales in children, 2) the influence of running speed and other physiological variables such as …
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Fault tolerant behavior of advanced control schemes of induction machine drives
… parameter sensitivity, dynamic responses, steady state performance and, most importantly, under power line fault scenarios. MATLAB-Simulink package is used to develop system models for both control schemes. System studies are done under normal and abnormal operating conditions. In the end, …
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A dynamic, entropy minimizing, equilibrium-oriented approach to transportation planning
… goal because it represents the least probable state. Traditionally, the gravity model has been used to describe future spatial organization because as an entropy maximizing approach, it provides the only unbiased situation which can be assumed. While the maximum entropy solution to a problem is …
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Integrating reliability into performance-oriented design of fault-tolerant switch-mode DC-DC converters for photovoltaic energy-conversion applications
… in photovoltaic energy-processing applications: steady-state performance and system reliability. A general framework for fault-tolerant design is presented in the context of a multiphase, interleaved boost converter. A unified, system-level, steady-state description for this topology is proposed. …
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Fuzzy control and an evaluation of the self-organizing fuzzy controller
… its rules in real time based on the system performance. It was tested to determine how well it was able to learn a quality control policy. The self-organizing controller was found to exhibit poor steady state performance, and to be equally likely to learn poor control as to learn good …
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Steady-State Analysis in Transmission System Planning per Latest TPL-001-4 NERC Standard
… general programs aimed at facilitating the performance of such contingency studies based on the latest Transmission System Planning Performance Requirement standard issued by NERC, TPL-001-4. The focus of this work is on the requirements for the steady state analysis described in the …
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Induction motors with modulated terminal voltage
Following the development of high speed solid state switches for the forced commutation of current in AC power circuits it has become feasible to apply forced commutation techniques to the frequency and voltage control of induction motors as variable speed drives. The availability of these methods …
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Mixed-domain performance model of the piezoelectric traveling-wave motor and the development of a two-sided device
… modeling approach for the accurate prediction of steady-state performance of piezoelectric traveling-wave motors, and (2) to improve upon the typical piezoelectric traveling-wave motor configuration by investigating the novel implementation of two-sided operation. Firstly, a performance model of …
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The Effects of Rewards on the Ability of an Autonomous UAV Controlled by a Reinforcement Learning Agent to Accomplish a Target Localization Task
… use past experiences to improve future mission performance. In this research, the effects of rewards on the ability of an autonomous UAV controlled by a Reinforcement Learning agent to accomplish a target localization task were investigated. The numerical values of the reward scheme were varied. …
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A wide-range axial-flow compressor stage performance model
… These models require a knowledge of the steady state operating characteristics as inputs, which limits the ability to use them as predicting tools. The full range of dynamic axial flow compressor operation spans forward and reversed flow conditions. A model for predicting the wide flow …
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Experimental and Numerical Investigations of Tubular-Shaped Direct Methanol Fuel Cells (DMFCs)
… model was developed to investigate the steady-state performance and design characteristics of a tubular-shaped, passive DMFC. It was found that a higher ambient temperature improves fuel cell performance, but also increases both methanol and water crossover. Oxygen depletion along the …
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Separating conflict-recovery from failure-recovery in distributed consensus
… can mask or recover from failures. Current state-of-the-art consensus protocols re-use their failure-recovery mechanism to resolve ordering conflicts. The thesis of this dissertation is that it is feasible to separate the mechanisms for conflict-recovery and failure-recovery, and that doing …
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Applications of robust optimization to queueing and inventory systems
… the application of robust optimization in the performance analysis of queueing and inventory systems. In the first part of the thesis, we propose a new approach for performance analysis of queueing systems based on robust optimization. We first derive explicit upper bounds on performance for …
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GLR Control Charts for Monitoring a Proportion
… statistics that follow a binomial distribution. Steady state performance is evaluated for the binomial GLR chart and the other widely used binomial charts. We find that in terms of the overall performance, the binomial GLR chart is at least as good as the other charts. In addition, since it has …
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Regression Function Characterization of Synchronous Machine Magnetization and Its Impact on Machine Stability Analysis
… the ferromagnetic core significantly affects the performance of electrical machines. In the performance analysis of electrical machines, an accurate representation of the magnetization characteristics in the machine model is important. As a part of this research work, two new mathematical models …
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Regression Function Characterization of Synchronous Machine Magnetization and Its Impact on Machine Stability Analysis
… the ferromagnetic core significantly affects the performance of electrical machines. In the performance analysis of electrical machines, an accurate representation of the magnetization characteristics in the machine model is important. As a part of this research work, two new mathematical models …
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