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 189 for “"fixture"”.
-
Kinematic methods for automated fixture design
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
-
Automatic setup planning and fixture design for machining
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
-
Welding fixture design for irregular profile metal bellows
A general design is presented that can be used to weld Metal bellows of any shape. The bellows are made of thin stainless diaphragms welded together. Currently there is no established method for welding non-circular bellows that is both low cost and reliable. This thesis addresses some of the …
-
Workpiece -Fixture Frictional Contact and Its Influence on Machining Performance
… process stability by taking the workpiece-fixture interaction into account. Results from machining process stability showed that the machining stability is strongly influenced by the frictional contact and the incorporation of its influence allows for optimal fixture design.
-
Electrode arrays, test fixture, and system concept for high-bandwidth capacitive imaging
… drive electronics. We also fabricate a test fixture for positioning these sensors relative to and sweeping them across targets on a conductive base. As the sensors sweep across targets, their impedance is measured from 1 - 500 MHz using an impedance analyzer and is later converted into the …
-
The fixture and methodologies for evaluating vibration characteristics of hand-held pneumatic impact tools
A test fixture has been designed for the testing of hand held pneumatic impact tools. The test fixture was modeled after a one-degree of freedom mass-spring-damper system. The design of the test fixture allows for a broad range of testing scenarios intended to simulate the methods in which impact …
-
Design and Qualification of a Test Fixture to Experimentally Determine Global Tire Force Properties
… of a tire, suspension, and chassis test fixture (TiSCTeF) is detailed as part of this study. This fixture will support the validation of effective, parametric finite element models currently under development, as well as the design and testing of suspension and chassis components for the …
-
A kinematic-coupling-based adaptive fixture for high precision positioning applications in flexible manufacturing systems
… level accuracy and repeatability with detachable fixtures will be an enabling technology in future manufacturing processes. Given the many sources of time variable errors in fixture alignment (i.e. thermal, load, vibration), the integration of actuators and sensors within fixtures will be …
-
Development of kinematic coupling preload guidelines through design and testing of an adjustable micromanufacturing fixture
… that are moved between these machines. Such a fixture--a hybrid positioning fixture (HPF)--has been designed, fabricated, and tested. This HPF has demonstrated <50 nm and <1.5 [mu]rad 2[sigma] (95% confidence) static positional repeatability over 1000 separation-engagement cycles and equivalent …
-
Prefab the FabLab : rethinking the habitability of a fabrication lab by including fixture-based components
This thesis is about defining a fixture-based system that can be adapted into a digital fabrication production system of friction fit assembly. It is inspired by the work and research conducted by the Digital Design Fabrication Group at MIT, specifically the work related to the Cabin House and the …
-
Standard operating procedure for Highly Accelerated Life Testing (HALT) : design and standardization of fixture setup for circuit boards
… operating procedure (SOP) to standardize the fixture setup process so as to minimize variation in vibrational responses attributed to fixture setup. This study proposes a three phase approach to meet the objective. The first phase aims to minimize variation in the gauges and the vibration …
-
Impact of Flow Rate and Water Age on Opportunistic Pathogen Growth: Implications for Water Conservation, Fixture Design, and Policy
Water conservation efforts have led to a decrease of flow rates in buildings, increasing water retention time (WRT) and sometimes opportunistic pathogens (OPs) growth. A novel experiment with replicated distal pipes operated at commonly used flow rates was designed to evaluate the effects of water …
-
Design of a Testing Fixture for the Characterization and Modeling of a Powered Prosthetic Ankle Using a Lorentz Force Actuator
… to continue developing such a characterization fixture.
-
TQM : fad or fixture? Implementing total quality management in health care setting through the development and use of customer-supplier models
This research study reviews the global advances made in health care quality assurance, tracing its origins from the manufacturing and service industries through to the context of the health care industry. The Total Quality Management (TQM) model, originally adopted by the industrial sector is …
-
Design and engineering of low-cost centimeter-scale repeatable and accurate kinematic fixtures for nanomanufacturing equipment using magnetic preload and potting
… a low-cost, centimeter-scale kinematic coupling fixture for use in nanomanufacturing equipment. The fixture uses magnetic circuit design techniques to optimize the magnetic preload required to achieve repeatability on the order of 100 nanometers. The fixture achieves accuracy to within one …
-
Design of ultra precision fixtures for nano-manufacturing
… fixturing system called the Hybrid Positioning Fixture (HPF). The HPF uses the principles of exact constraint, combined with principles and means of Nanomanipulation to fixture components with tens of nanometer accuracy and repeatability. Achieving this level of performance requires addressing …
-
The integration of visual and tactile sensing for the definition of regions within a robot workcell
… locate, and orientate two types of circuit board fixtures. The vision system approximately locates the corner points of each fixture in the robot workcell. The tactile system uses the data base created by the vision system to conduct a tactile search for each fixture and to accurately define the …
Page 1 of 10