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 14 of 14 for “"bogie"”.
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Complex Bogie Modeling Incorporating Advanced Friction Wedge Components
… Due to costs and physical constraints, not every bogie component can be instrumented during test, so the computer model will be able to provide valuable information not easily obtained otherwise. Second, full-truck models using different contact geometry between the wedges, sideframes, and bolster …
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Analysis and traction control of a rocker-bogie planetary rover
… rover. Its design is based on the rockerbogie configuration. A procedure is presented which can rapidly compute the configuration of the rover as a function of its environment. Also, a quasi-static force analysis of the system is detailed. It considers realistic physical constraints such …
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Multi-Domain Multi-Material Topology Optimization of a Roller Coaster Vehicle Bogie Subject to Multiaxial Fatigue Constraints
… posed by roller coaster wheel assemblies (bogies), specifically focusing on multiaxial fatigue topology optimization. Roller coaster bogies endure complex multiaxial loading conditions and require specialized fatigue constrained optimization due to their intricate loading, operating …
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Development of mathematical model for monorail suspension system under different track conditions
… New Monorail designs require more powerful bogies with new dimensions to accommodate more passengers, therefore new suspension system design is essential. In order to overcome new designs problems, better understanding of the suspension system is needed by mathematically modeling the system …
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Design of a laboratory test bed for planetary rover systems
… systems. The design of a six-wheeled rocker bogie rover and a mechanism for this rover to vary its geometry using shape memory alloys are presented. The rover's geometry is scaled from Jet Propulsion Laboratory's Lightweight Survivable Rover (LSR). The 3 degree of freedom manipulator arm and …
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Únavová analýza a životnost ocelových konstrukcí
… oje rámu traktorového přívěsu se zavěšením kol bogie ze strojírenského i stavebního hlediska. Příklad slouží jako algoritmus řešení predikce životnosti ze strojírenského i stavebního hlediska a také odhaluje možnost řešení životnosti strojírenských ocelových konstrukcí ze stavebního hlediska. Na …
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Analysis on actuator dynamics in active wheelsetcontrol
… both a two–axle vehicle model and a full bogie vehicle model are being evaluated individually in the study In addition, a state observer is developed in this study to estimate the output torque of the electro–mechanical (EM) actuator since feedback measurements are essential for the …
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Semi-active control for independently rotating wheelset in railway vehicles with MR dampers
… a two–axle vehicle model and a full bogie vehicle model are both evaluated individually in the study.The performance and robustness assessments of the developed semi-active controller with the full active control system are evaluated with the use of both two–axle vehicle model and the …
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Characterization of whole-body vibration for monorail passenger ride comfort
… it was found to be fairly-uncomfortable at rear bogie and not-uncomfortable at center of car. The statistical analysis has proven the significance of orientation, location and operating hours by significant value p = 0.000 (i.e. p < α) with 29.5% of the variance has been accounted between groups. …
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A Wavelet-Based Rail Surface Defect Prediction and Detection Algorithm
… be measured using accelerometers mounted to the bogie side frames or wheel axles. Typical signal processing algorithms for detecting defects within a vertical acceleration signal use a simple thresholding routine that considers only the amplitude of the signal. As a result, rail surface defects …
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Development of a Mars Exploration Rover for RASC-AL Exploration RoboOps Competition with an Extended Kalman Filter Based Navigation System
… four-wheel steering, and a rocker-bogie suspension system similar to NASA rovers currently operating on Mars.;This research then presents a Navigation Assistance System (NAS) capable of providing nine-state navigation data, using small, lightweight, and low-cost sensors. In order to …
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Metodología Analítica para el Estudio de Sensibilidades Aplicado a Modelos de Simulación Dinámica de Vehículos Ferroviarios, desde el Punto de Vista de la Seguridad, la Fatiga de Vía y la Calidad de Marcha
… de clasificación más evidentes el empate de bogie, y la rigidez de la suspensión secundaria. En base a ellos se han identificado tres grandes categorías de vehículos: mercancías; coches de pasajeros de corta distancia; y coches de pasajeros de largo recorrido. Por su parte, durante el …
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A Multibody Dynamics Approach to the Modeling of Friction Wedge Elements for Frieght Train Suspensions
This thesis presents a theoretical application of multibody dynamics with unilateral contact to model the interaction of the damping element in a freight train suspension, the friction wedge, with the bolster and the side frame. The objective of the proposed approach is to produce a stand-alone …
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Advanced Multibody Dynamics Modeling of the Freight Train Truck System
Previous work in the Railway Technology Laboratory at Virginia Tech focused on better capturing the dynamics of the friction wedge, modeled as a 3D rigid body. The current study extends that work to a half-truck model treated as an application of multibody dynamics with unilateral contact to model …