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 67 for “"force measurement"”.
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STEP-enabled Force Measurement Platform of Single Migratory Cells
… two unique bioscaffolds are demonstrated for the measurement of group cell migration for wound closure and single cell contractility force for the study of force modulation. The wound healing assay bridges the gap between confluent reservoirs of NIH3T3 fibroblasts through arrangement of a …
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A Kinematical Investigation of Some External Wind Tunnel Force Measurement Systems
… fundamental concepts associated with wind tunnel forces measurement systems (balances) is presented. Detailed static analyses are performed on the six component pyramidal, six component floating beam, and three component strain gaged strut balances. These static analyses lead to a dimensional …
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Design of a load cell for triaxial force measurement in walking
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1981.
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Development of a tri-axial (vertical and shear) force measurement foot platform
… measure the vertical foot pressure (vertical forces), there are currently no commercially available instruments to measure the horizontal or shear forces. It is the aim of this project to develop a platform instrument capable of measuring the three dimensional forces (i.e. vertical pressure …
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System Identification and Calibration Techniques for Force Measurement in Active Magnetic Bearings
… could benefit from the continuous feedback of force applied to the bearings that support the machinery. Such a system could be used to provide diagnostics for process monitoring in a manufacturing application or to provide information for machine health monitoring. Active Magnetic Bearings …
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Development of Photoelastic Gelatin Spheres for Force Measurement and Visualization in Granular Media
A new method for measuring forces in granular media experiments using photoelastic gelatin spheres was developed. The photoelastic performance of gelatin spheres based on composition was evaluated and calibration curves were developed. The photoelastic response of the spheres was determined to be …
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In situ blocked force measurement in gearboxes with potential application for condition monitoring
… modes, (iii) new approach called in-situ blocked force. A test rig was built, designed and fabricated for experimental data collection. The experimental work was carried out using a healthy spur gear and one suffering from tooth breakage with two levels of faults; 25% and 85%. This study reports …
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May the force be with you : a medical ultrasound system with integrated force measurement
… face with the patient, and the contact force exerted by the sonographer can vary widely throughout a scan or from scan to scan. This thesis explores the design and development of an electromechanical system to measure the contact force during ultrasound scanning. The device is a handheld …
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Tactile Sensing System Integrated to Compliant Foot of Humanoid Robot for Contact Force Measurement
Human beings have a touch and force estimation mechanism beneath their feet. They use this feeling of touch and force to maintain balance, walk, run and perform various agile motions. This paper presents a new sensor platform beneath the humanoid feet, enabled by a pragmatic model based compliant …
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A Multi-Point Measurement Technique for the Enhancement of Force Measurement with Active Magnetic Bearings (AMB)
… as support bearings and as load sensing measurement tools. Previous work in the area of AMB force measurement has relied upon basic magnetic equations requiring knowledge of coil currents and air gap lengths. Some researchers have utilized magnetic flux probes to eliminate the need for …
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Design and Validation of a Force Measurement System for the Analysis of Airfoil Lift and Drag Characteristics
… was split into two phases, where in each phase a force measurement system was designed in conjunction with a series of experimental tests. Therefore, during Phase 2 of the research, a new external strain gauge balance (System 2) was developed specifically for the DCU wind tunnel and with the …
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Direct Force Measurement between Surfaces Coated with Hydrophobic Polymers in Aqueous Solutions and the Separation of Mixed Plastics by Flotation
… on the kinetics of flotation. Therefore, the forces acting between the surfaces coated with different hydrophobic polymers (or plastics) in water were measured using the Atomic Force Microscope (AFM). The results obtained with polystyrene, polymethylmethacryrate (PMMA), polypropylene (PP), and …
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In vivo mechanical loading conditions of pectorally implanted cardiac pacemakers : feasibility of a force measurement system and concept of an animal-human transfer function
The objectives of this study were to assess the feasibility of this system for measuring in vivo mechanical loading on pectorally implanted pacemakers, to compare differences in mechanical loading experienced by pacemakers in different pectoral implant positions (i.e. sub-muscular and …
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Design and characterization of a smart bit for in-situ force measurement, using capacitive load cells and acoustic spectra analysis to determine rock type and tool wear in rock excavation process
… frequencies, acoustic emissions, and cutting forces are all known to vary with rock type and tool wear conditions, and this work captures those changes with varied cutting test conditions. Three different sensor designs were tested: a capacitive load cell with non-linear dynamics used to …
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Measurements of Wings at Very Low Reynolds Numbers
… In the work culminating in this thesis, force measurement apparatuses were designed and prototyped to measure wing performance at very low Reynolds numbers in a water tunnel. The lift and drag behavior for rectangular wings with discretely angled wing profiles and aspect ratio were …
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Design of a Testbed for Haptic Sensor Calibration and Characterization
… the characterization and calibration of haptic force sensors. This test bed can apply and measure contact forces up to 10N anywhere within a 60x60x60mm volume, at angles up to ±10 degrees from the normal. A procedure for haptic sensor calibration and characterization was developed for this test …
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NOVEL SENSOR PLATFORMS BASED ON FABRY-PEROT RESONATORS FOR APPLICATIONS IN ENVIRONMENTAL GEOPHYSICS
… widely used for various physical and chemical measurements owing to their unique advantages over traditional sensors such as high measurement resolution, mechanically robust, and distributed sensing capabilities. This dissertation focuses on the development of robust fiber optic microwave …
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Measurement of finger coordination during a motor learning task
… subjects, over time in a series of isometric force control learning tasks. During a series of trials with real-time visual feedback of the five finger forces, subjects adapted their grasp strategy in order to reach the target in a time efficient manner. In early trials, it is very evident that …
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An actively cooled floating element skin friction balance for direct measurement in high enthalpy supersonic flows
… chamber walls of supersonic combustor models. Measurements were made in a combustor at the General Applied Science Laboratory (GASL) and in the Direct Connect Arcjet Facility (DCAF) supersonic combustor at the NASA AMES Research Center. Flow conditions in the high enthalpy combustor models …
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