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 25 for “"Vertical acceleration"”.
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The Effects of Vertical Acceleration in Mathematics
… of this study was to examine the effects of vertical acceleration of students who had taken algebra in the eighth grade. A questionnaire was administered to seniors to determine the attrition rates and their perceived success level in subsequent mathematics courses. All seniors in four high …
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Sliding of gravity retaining wall during earthquakes considering vertical acceleration and changing inclination of failure surface
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1979.
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Optimal deadrise hull analysis and design space study of naval special warfare high speed planning boats
… to determine the effects of hull deadrise on vertical acceleration. Finally, the results of the ODH analysis are used to perform a design space study of planing hulls in order to optimize the overall design for vertical acceleration based on hull deadrise, cruise speed, and payload weight.
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Algorithm to enable intelligent rail break detection
… the wavelet intensity factor values. For each vertical acceleration value, corresponding to a specific location on the track, we now have a corresponding intensity factor. The intensity factor corresponds to break-no break information and can now be used as a feature to classify the vertical …
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Analysis of the Use of Probe Vehicles for Road Infrastructure Data Analysis
… data. This concept was demonstrated by measuring vertical acceleration using in-vehicle sensors in order to describe road ride quality. Data collection was performed at the Virginia Smart Road using two instrumented vehicles. The gathered information was compared to road profile data collection, …
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Analysis of the flow structure and reattachment over accelerating non-slender delta-wing planforms
… studying non-slender delta wings under axial or vertical acceleration, experiments of steady translation with fixed wings under multiple angles of attack were conducted both in the Center of Excellence at Syracuse University at Re ≈ 20, 000, and in the OTTER lab at Queen’s University at Re ≈ 300, …
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A Wavelet-Based Rail Surface Defect Prediction and Detection Algorithm
… 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 that produce low amplitude acceleration signatures may not be detected, and special track components …
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Development of a Small Unmanned Aerial Vehicle Longitudinal Model for Future Flutter Testing
… 65% match in the pitch rate and 70% match in the vertical acceleration flight data from a doublet response. The short period mode was identified to have a frequency of 6.01 rad/s and a damping ratio of 0.977.</p>
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Modeling of the human head/neck system using rigid body dynamics
… aircraft in flight places dangerously large vertical acceleration forces on the body of the member. The additional mass on the head due to Night Vision Goggles and Helmet Mounted Displays increases the vulnerability of the head/neck system to injury. To eliminate the need for human testing, …
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Optimal suspension damping and axle vibration absorber for reduction of dynamic tire loads
… vibration modes of the vehicle associated with vertical and pitch motions of the sprung and unsprung masses. The high levels of tire induced road damage caused by heavy vehicles has prompted a growing demand for the design of road-friendly vehicles. In this study, the enhancement of road …
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Transient Motion Control of Passive and Semiactive Damping for Vehicle Suspensions
… vehicle body heave and roll displacements, the vertical displacement of the tire (wheel hop) and the vertical acceleration of the vehicle body. For each output, the maximum peak-to-peak and RMS values of the response are examined. The results of the study show that semiactive dampers have …
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The Feasibility of Accelerometer-Derived Measures of Vertical Jump Height as a Marker of Neuromuscular Performance in Collegiate Soccer Players
… was then used to calculate CMJ height from vertical acceleration. Results showed that CMJ heights were very reliable both within and between testing days. CMJ heights were found to accurately decrease following both high-load training sessions and a competitive soccer match. For both …
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The analysis and simulation of the spectral and statistical properties of road roughness for package performance testing
… based on the reproduction of vehicle vertical acceleration from the Power Spectral Density (PSD) estimate. The vertical vehicle response acceleration is primarily a function of vehicle suspension and speed, but is ultimately caused by fluctuations in the road surface. This thesis …
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Fundamental Dynamics and Performance Assessment of Three-Dimensional Seismic Isolation
… structures. Recent research has suggested that vertical excitation has significant effects on the structural response during an earthquake. In this dissertation, the dynamic response and control of buildings with 3-dimensional (3D) isolation systems is explored. First, the fundamental dynamic …
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The use of inertial measurement units for the determination of gait spatio-temporal parameters
… validity of the IMU method when measuring the vertical centre of mass (CoM) acceleration, velocity and position versus an optical motion capture system (OMCS) in TDA. The second study addressed the validity of the IMU and inverted pendulum model measurements within PD and also explored the …
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Numerical Solution of the One-dimensional and Cylindrical Serre Equations for Rapidly Varying Free Surface Flows
… in the water surface. These changes produce vertical acceleration of the fluid particles. These vertical accelerations manifest as a series of oscillating waves, called dispersive waves, which follow abrupt changes in the water surface. These dispersive waves can have a significant influence …
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Numerical Solution of the One-dimensional and Cylindrical Serre Equations for Rapidly Varying Free Surface Flows
… in the water surface. These changes produce vertical acceleration of the fluid particles. These vertical accelerations manifest as a series of oscillating waves, called dispersive waves, which follow abrupt changes in the water surface. These dispersive waves can have a significant influence …
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Asymmetric Energy Harvesting and Hydraulically Interconnected Suspension: Modeling and Validations
… comfort is evaluated with the RMS value of the vertical acceleration and is found to have minimum compromise from the greater damping coefficient.
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Time domain simulation of hydroelastic response of ships in large amplitude waves
… hydroelasticity analysis for symmetric (i.e. vertical motions, distortions and loads) dynamic behaviour in waves, including the influence of nonlinearities, is presented in this thesis using two methods. In the first method the total response is decomposed into linear and non-linear parts. The …
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