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 138 for “"Lumped-parameter"”.
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Control of Mixed Distributed and Lumped Parameter Systems
Made available in DSpace on 2014-12-10T19:07:26Z (GMT). No. of bitstreams: 1 7511699.pdf: 3494952 bytes, checksum: 19f0d72555058af6ee9b9f835b851b9f (MD5) Previous issue date: 1974
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The Response of Linear Lumped-Parameter Damped Systems
Made available in DSpace on 2014-12-08T23:56:00Z (GMT). No. of bitstreams: 1 6406131.pdf: 3859482 bytes, checksum: 8f077081b677ffca2de4142c43a21440 (MD5) Previous issue date: 1963
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Piezohydraulic Actuator Design and Modeling Using a Lumped-Parameter Approach
… while the cylinder was loaded or unloaded. Lumped-parameter state-space models have been developed in order to simulate the dynamics of the active valves and entire actuator system. The model simulates the chamber pressure, displacement of the hydraulic cylinder, and power of the …
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Complexity analysis of lumped parameter models : development of complexity reduction algorithm
Lumped parameter models have been shown to be a useful tool for geothermal reservoir analysis and production planning. Tank models are a common form of lumped parameter models, incorporating tanks of given capacitance partially filled with fluid. Between the tanks are connections with given …
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A lumped-parameter model of tire-terrain interactions for off-road vehicles
… This thesis aims at developing a discrete, lumped-parameter, physical model for capturing transient interactions between a deformable tire and a deformable terrain. Specifically, the model accounts for the radial and the tangential deformation in the tire as well as the normal and the …
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Estimation of sustainable production limit by using lumped parameter and USGS hydrotherm simulation
… the response of the reservoir according to the parameters applied. These two software packages were used to investigate the sustainable limit of Munadarnes low temperature geothermal reservoir. In this sense, thermal front velocity modelling of the Munadarnes reservoir was investigated in the …
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CFD-informed Lumped Parameter Models Result In High-Fidelity Maneuvering Predictions of AUVs
… to the need of higher fidelity of physics based lumped parameter models. The sensor data, along with maneuvering model data can tie into a more accurate trajectory. Multiple such incremental advances in the literature for prediction of maneuvering shall lead to a more accuracy. This work hopes to …
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Development and Analysis of the Lumped Parameter Model of a Piezo-Hydraulic Actuator
… of a piezoelectric stack has been achieved. A lumped parameter model is developed in order to simulate the dynamics of the hydraulic system and of the entire piezohydraulic unit. The model did approximate the response of the piezohydraulic unit under a one-sided operation. Time response …
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A modal analysis method for a lumped parameter model of a dynamic fluid system
A lumped parameter model is developed for the analysis of dynamic fluid systems and the techniques of modal analysis are applied. An introduction to the lumped parameter modeling approach is accomplished by a thorough review of the dynamic mechanical system. This review of mechanical system …
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Lumped Parameter Model for a Self Powered Fontan Palliation of the Hypoplastic Left Heart Syndrome
… is created to identify important physiological parameters caused be the IJS. By numerically approximating the solution using a lumped parameter model (LPM) of a single ventricle cardiovascular system, the physiological parameters can be approximated. Systemic flow, pulmonary flow, caval pressure …
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A simplified representation of damping force in lumped-parameter systems with linear and nonlinear damping
The objectives of this thesis are to formulate analysis techniques which determine the damping coefficients for each sub-system in the mathematical model of linear multi-degree-of-freedom systems, and to determine modal dissipation functions for nonlinear systems. For the purpose of this study, …
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Lumped-Parameter Analysis for Shear Failure in the End Slab of Cylindrical Prestressed Concrete Pressure Vessels
Made available in DSpace on 2014-12-10T22:21:29Z (GMT). No. of bitstreams: 1 7114794.pdf: 2578047 bytes, checksum: e48156b07c4e6c62e9fdb61a7fafdcbd (MD5) Previous issue date: 1970
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Hamilton's law of varying action--its interpretation and application in dynamics problems of lumped-parameter systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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Nonlinear Lumped-Parameter Model of the Lumbar Intervertebral Disc: A Study on Viscoelastic Deformation and Three-Dimensional Modeling of the Spine
Due to the mathematical complexity of current musculoskeletal spine models, there is a need for computationally-efficient models of the intervertebral disc (IVD). The aim of this study is to develop a mathematical model that will adequately describe the motion of the IVD under axial cyclic loading …
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A Coupled CFD-Lumped Parameter Model of the Human Circulation: Elucidating the Hemodynamics of the Hybrid Norwood Palliative Treatment and Effects of the Reverse Blalock-Taussic Shunt Placement and Diameter
… RBTS diameters (3.0, 3.5, 4.0 mm). A closed lumped parameter model (LPM) for the peripheral or distal circulation coupled to a 3D Computational Fluid Dynamics (CFD) model that allows detailed description of the local hemodynamics was created for each anatomy. The implementation of the RBTS in …
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An investigation into the thermal modelling of induction motors.
… rise must be limited to safe values. A lumped parameter thermal model has been developed, which allows rapid and accurate estimation of the temperature distribution in a machine. The lumped parameter thermal model depends on the accurate knowledge of the thermal coefficients and more …
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Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators
… polypyrrole (PPy) actuators to develop low-order lumped parameter models of actuator electrical, mechanical, and electromechanical behavior. Experimental data were processed using system identification techniques. Both grey box and black box models were identified. The grey box model consisted of …
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An analytic evaluation of the upper break frequency of the human otolith organ
… two orders of magnitude too small. The accepted lumped parameter model of the otolith organ is approximated to be independent of cupular stiffness for small time. Removal of the stiffness leads to a problem which, when subjected to a change in linear velocity, is analogous to Stokes' impulsive …
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Thermal Modelling of the Ventilation and Cooling inside Axial Flux Permanent Magnet Generators
… This thesis describes the developments of a lumped parameter, thermal modelling technique for axial flux permanent magnet generators. The main aim of this research is to develop a fast and accurate thermal modelling tool which can be used for rapid machine design and ultimately, to replace …
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Taylor-Aris dispersion in microfluidic networks
… development and application of a theory for the lumped parameter, convective-diffusive-reactive transport of individual, non-interacting Brownian solute particles ("macromolecules") moving within spatially periodic, solvent-filled networks - the latter representing models of chip-based …
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