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 35 for “"Velocity information"”.
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Optimal Kalman Filter Integration of a Global Positioning System Receiver and an LN-94 Inertial Navigation System
… The GPS provides highly accurate position and velocity information in low dynamic environments. An INS provides position and velocity information with lower accuracy over long periods of time, but it is highly responsive in dynamic maneuvers or at high frequencies. The INS has the added …
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Visual Inertial Odometry with Sparse Deep Learning
… that combines inertial measurements with wheel velocity information while using visual odometry to further optimize the pose estimates. On the visual odometry side, the paper presents a training module with an automated data collection system and a more sparse graph neural network to train with. …
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Ground penetrating radar characterization of geologic structure beneath the Aberjona wetland
… its ability to extend point-source ground truth information into two and three dimensions. This dissertation provides an accurate geologic model of one section of the Aberjona wetland by improving the state of three-dimensional GPR imaging. Data fusion, target implantation, and a novel 3-D …
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Design of a 3-D rapidly scanning laser Doppler velocimeter with low SNR signal processing
A rapidly scanning directionally sensitive three-velocity-component laser Doppler velocimeter (RSLDV) has been designed. It permits scans through three-dimensional flows to obtain space-time velocity information and almost "instantaneous" velocity profiles vital to understanding such flows. A …
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Evolvable Mathematical Models: A New Artificial Intelligence Paradigm
… tasks: the double-pole balancing without velocity information benchmark and the challenging discrete Double-T Maze experiments with homing. The results from these experiments show that EMMs are capable of solving tasks typically solved by ANNs, and that they have the ability to produce …
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Plane wave parameter estimation using gps estimates of total electron content in a neural network
… a network which utilizes Doppler frequency and velocity information to estimate the waveheading, wavelength, and frequency of a plane wave. After an evaluation of our simulated environment, we apply our network to GPS data captured during the 11 March 2011 Tohoku tsunami.
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Geomagnetic Aided Dead-Reckoning Navigation
… and it can supply real time position and velocity information. However, its accuracy can be compromised by external operational effects such as signal availability, cyber-attacks or weather conditions. This thesis investigates an alternative approach to enhance navigation in GPS-denied …
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The impact of GPS velocity based flight control on flight instrumentation architecture
This thesis explores the use of velocity information obtained by a Global Positioning System (GPS) receiver to close the aircraft's flight control loop. A novel framework to synthesize attitude information from GPS velocity vector measurements is discussed. The framework combines the benefits of …
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Automated detection of a crossing contact based on its Doppler shift
… all contacts with discrete tonals and relative velocity to the receiver. This thesis demonstrates that the Doppler effect can be exploited to improve the detection process by filtering out contacts that do not exhibit these characteristics. Cross-correlation (matched filtering) of contact …
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A rapidly scanning three-velocity-component laser Doppler anemometer
A rapidly scanning directionally-sensitive three-velocity - component laser Doppler anemometer has been developed. It permits scans through 3-dimensional flows to obtain space-time velocity information. Since it has lower signal-averaging bias than pointwise measurements, only short record times …
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Design and control of a space based two link manipulator with Lyapunov based control laws
… the pitch attitude of the spacecraft. Position information from the main body and manipulators was obtained from Rotary Variable Displacement Transducers (RVDT). The equations of motion were developed assuming that the main body and manipulator were rigid bodies. the resulting coupled, …
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Synthetic Aperture Radar Rapid Detection of Range and Azimuth Velocities Implemented in MATLAB
… on the final image. In addition, there is no velocity information that is calculated as part of the processing. The objective of this thesis is to develop techniques to determine the azimuth and range velocities of moving objects in the target space in the early stages of SAR processing. The …
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Development of an actively compliant underwater manipulator
… motor sensors to provide torque, position, and velocity information. A three axis manipulator rated to full ocean depth was built. Each of the revolute joints is driven by a DC brushless sensorimotor working through a multi-stage cable/pulley transmission. The manipulator mechanism and wiring is …
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Optical flow using phase information for deblurring
… reconstructing motion-degraded images by using velocity information generated with a phase-based optical flow calculation. The optical flow method applies a set of frequency-tuned Gabor filters to an image sequence in order to determine the component velocities for each pixel by tracking …
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Arty: Expressive timbre transfer using articulation detection for guitar
… another instrument while preserving key musical information like pitch and loudness. Current attempts tend to rely either on MIDI pitch and velocity information, or on Deep Learning networks. The former approach requires discarding a lot of information and hence suffers from a loss of …
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Dispersive Characteristics of Left Ventricle Filling Waves
… which provides a spatio-temporal map of inflow velocity. These filling patterns, or waves, are conventionally used to qualitatively assess the filling pattern, however, this work aims to physically quantify the filling waves to improve understanding of diastole and develop robust, reliable, and …
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Visualisation of dynamic flow processes using a novel pulsed multi-element hot-wire anemometer.
… local convection rate and hence the local fluid velocity. Thus if the heating current is supplied in short duration pulses of constant magnitude, and if the time taken to reach a given set temperature (the Set Temperature Point, STP) is recorded during the heating process, velocity information is …
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Experimental Study of Two-Phase Cavitating Flows and Data Analysis
… of bubble dynamics in cavitating flows, with velocity information obtained for two phases; (2) measure the slip velocity between the liquid and the vapor to provide the validation data for the numerical cavitation models; (3) consider the thermodynamic effects of cavitation to establish the …
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Multichannel Sense and Avoid Radar for Small UAVs
… target detection, tracking, and 3-D location and velocity information on potential non-cooperative hazards, primarily focusing on general aviation (GA) aircraft. The resulting FMCW miniature radar system has a size weight and power (SWaP) that is suitable for installing onboard the 40% Yak-54 UAS …
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A psychophysical investigation of human visual perceptual memory. A study of the retention of colour, spatial frequency and motion visual information by human visual short term memory mechanisms.
… aim of this thesis was to investigate how visual information is organised in perceptual short term memory, with special interest in colour, spatial frequency and velocity. Previous studies of VSTM have indicated the existence of specific memory mechanisms for visual attributes such as orientation, …
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