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 211 for “"Inertial Measurement"”.
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MEMS IMU inertial measurement unit one-way-travel-time inertial measurement unit autonomous underwater vehicles
… XY position error. Additionally, advances in inertial sensor technology have drastically lowered the size, power consumption, and cost of these sensors. Nonetheless, these sensors are still noisy and accrue error over time. This thesis builds on the research and recent developments in single …
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Inertial measurement via dynamics of trapped particles
… and practical aspects of the particle trap as an inertial sensor. The insight motivating this approach is that a trapped particle acts like a mass on a spring, but the restoring forces are provided by electrostatic fields. Exquisitely machined physical mechanisms can be replaced by carefully tuned …
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An inertial measurement unit for user interfaces
Inertial measurement components, which sense either acceleration or angular rate, are being embedded into common user interface devices more frequently as their cost continues to drop dramatically. These devices hold a number of advantages over other sensing technologies: they measure relevant …
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Using a gimbal to calibrate an inertial measurement unit
In this thesis, an inertial measurement unit (IMU) consisting of 3 accelerometers and 3 rate gyros is created using off-the-shelf sensors from STMicro and Analog Devices. A novel technique for calibrating the orientation, position, scaling and offset of each of the sensors on the IMU is developed. …
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Methods to obtain pedestrian distance walked via inertial measurement units
… This App, designed to work with one or two inertial measurement units (IMUs), requires gait analysis as one of its components. The most difficult part of performing this analysis is determining how far the patient has walked. Two competing methods were identified to gather this data. The …
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An inertial measurement-based gait detection system for active leg prostheses
… are presented. The sensor system consists of an inertial measurement unit comprising three accelerometers and three rate gyroscopes installed on the prosthetic limb and a set of strain gauges on the limb to detect changes in force. Using this instrumented prosthesis, data are collected while an …
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Inertial measurement unit calibration using Full Information Maximum Likelihood Optimal Filtering
… Likelihood Optimal Filtering (FIMLOF) for inertial measurement unit (IMU) calibration in high-g centrifuge environments is considered. FIMLOF uses an approximate Newton's Method to identify Kalman Filter parameters such as process and measurement noise intensities. Normally, IMU process …
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Using magneto-inertial-measurement-units to track upper-limb movement during rehabilitation
… A promising approach is to use Magnetic and Inertial Measurement Units (MIMUs), but they provide body-segment orientations rather than anatomical joint angles, the latter being more meaningful. To solve this problem the sensor orientation data must be interpreted anatomically, which requires …
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A novel inertial measurement unit-based device for capturing upper extremity biomechanics
The student, Andrew Hua, submitted this Dissertation for approval on 2019-10-31 at 10:21.
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Extended Kalman filtering applied to a full accelerometer strapdown inertial measurement unit
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Characterization of inertial measurement unit placement on the human body upon repeated donnings
… wearable motion capture systems that make use of Inertial Measurement Units (IMUs). The accuracy of any algorithm incorporating these sensors is limited by the accuracy of the sensor to segment calibration. In this study, 22 participants self-placed IMUs on three locations and performed six …
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Evaluating Alternative Inertial Measurement Unit Locations on the Body for Slip Recovery Measures
… to experimentally-controlled conditions. Inertial measurement units (IMUs) show promise as a portable and wearable form of motion capture. This study had two objectives. First, we investigated whether foot and ankle IMU-derived slip recovery measures could be considered equivalent to the …
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The use of inertial measurement units for the determination of gait spatio-temporal parameters
… this work was to develop a methodology whereby inertial measurement units (IMUs) could be used to obtain accurate and objective gait parameters within typical developed adults (TDA) and Parkinson’s disease (PD). The thesis comprised four studies, the first establishing the validity of the IMU …
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Influence of motion profile on estimating anatomical elbow joint axes using inertial measurement units
Current human motion measurement systems using inertial measurement units (IMUs) typically rely on precise alignment, static calibration poses, or dynamic calibration motions. Muller et al. recently proposed a method for online calibration of the human elbow anatomical joint axes via decomposition …
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A personal inertial-navigation system based on multiple distributed, nine-degrees-of-freedom, inertial measurement units
The use of inertial-measurement units (IMUs) for personal navigation is investigated in this thesis. IMUs lack a position-finding algorithm that optimally blends sensor data to achieve high accuracy in a GPS-denied environment. In this research, software and a methodology for tracking position …
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Validation of an Inertial-Measurement-Unit System for Calculating Hip and Knee Flexion Angles During Gait
<p>Technological advances regarding Inertial Measurements Units (IMUs) have positioned this type of sensor as an alternative for camera-based motion capture. This study introduces a new IMU based system (IMU<sub>sys</sub>) to measure hip and knee flexion angles. PURPOSE: To validate the use of a …
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A Machine Learning Approach for Next Step Prediction in Walking using On-Body Inertial Measurement Sensors
… future foot placement. Specifically, on-body inertial measurement units consisting of accelerometers, gyroscopes, and magnetometers, through integrated development by Xsens, are used for measuring human walking behavior in real-time. The data collection process involves measuring activity from …
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Using a Single inertial measurement unit to measure the knee flexion angle at touchdown in side cutting movements
… previous researchers have investigated using inertial measurement units to calculate joint angles, only a few studies can be found that were conducted using a single inertial measurement unit (IMU) to measure the joint angles. Furthermore, there have been a few previous studies that used a …
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An investigation into the use of inertial measurement units to assess the loading profiles of adolescent Badminton players.
… from trunk-mounted accelerometers, housed within Inertial Measurement Units (IMUs), yet many sports have specific anatomical regions where higher loads or injuries occur, which may not be measurable through trunk-mounted IMUs. Badminton was selected for study due to the high prevalence of both …
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