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 43 for “"Actuators and sensors"”.
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Polymer gel actuators and sensors
… of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Design and synthesis of molecular actuators and sensors
To date, the most successful conducting polymer actuators are based on polypyrrole, which operates through incorporating and expelling counterions and solvent molecules to balance the charges generated by electrochemical stimuli (swelling mechanism). Although significant progress has been made, …
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Electrical Properties of Macro-Fiber Composite Actuators and Sensors
Piezoceramic fiber composite (PFC) actuators and sensors offer many advantages over conventional monolithic piezoceramic devices. Conformable, durable and, when equipped with interdigitated electrodes (IDEs), more responsive than regular monolithic devices, PFCs promise to revolutionize the …
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Compensation methodologies for local control using strain actuators and sensors
… Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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Shaped actuators and sensors for local control of intelligent structures
… Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Vibration Analysis and Control of an Inflatable Toroidal Satellite Component Using Piezoelectric Actuators and Sensors
… antennas, solar thermal propulsion, and entry/landing systems. This is because inflatable structures are very lightweight and on-orbit deployable. In addition, they have high strength-to-mass ratio and require minimal stowage volume, which makes them especially suitable for …
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Additively Manufactured Dielectric Elastomer Actuators: Development and Performance Enhancement
<p>The recently emerging and actively growing areas of soft robotics and morphing structures promise endless opportunities in a wide range of engineering fields, including biomedical, industrial, and aerospace. Soft actuators and sensors are essential components of any soft robot or morphing …
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Estimation and control of flexible space structures for autonomous on-orbit assembly
… uses free-flying satellites to manipulate and connect elements of the structure. Since these elements are often flexible and lack embedded actuators and sensors, the assembly robot must use its own actuators and onboard measurements to suppress vibrations during transportation maneuvers. …
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Optimal placement of sensor and actuator for sound-structure interaction system
This thesis presents the practical and novel work in the area of optimal placement of actuators and sensors for sound-structure interaction systems. The work has been done by the author during his PhD candidature. The research is concentrated in systems with non-ideal boundary conditions as in the …
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Design and Analysis of Piezoelectric Transformer Converters
… ceramics are characterized as smart materials and have been widely used in the area of actuators and sensors. The principle operation of a piezoelectric transformer (PT) is a combined function of actuators and sensors so that energy can be transformed from electrical form to electrical form via …
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Adaptive feedback technique for unmodeled disturbance rejection
… transient disturbances via the fixed controller and rejection of steady disturbances via the adaptive controller. This technique differs from other control techniques in that it does not require a measurement of an external signal coherent with the disturbance, nor does it require knowledge of …
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Piezoelectric-based in-situ damage detection of composite materials for structural health monitoring systems
Cost-effective and reliable damage detection is critical for the utilization of composite materials. This thesis presents the conclusions of an analytical and experimental survey of candidate methods for in-situ damage detection in composite materials. Finite element results are presented for the …
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Axiomatic development of a machine control system
… processing equipment, which requires numerous actuators and sensors and the intelligent control of them to planarize thin layers of wafers. Signal processing modules, control algorithms, sequential process steps, graphical user interface, process recipe editor and the overall control system …
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Active control of sound transmission/radiation from elastic plates using multiple piezoelectric actuators
… with the use of piezoelectric transducers as actuators. A strain-energy model (SEM), based upon the conservation of strain energy, for a laminate beam with attached or embedded finite-length spatially distributed induced strain actuators was first developed to determine the induced strain …
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Multiphysics Modeling And Simulation Process To Develop Thin Piezoelectric Film Sensors To Measure The Vibration Of Structures With Complex Shapes And Boundary Conditions.
… was discovered in 1880 by Jacques and Pierre Curie. Its application has since been extended to actuators and sensors, widely used in industry, automotive, and aerospace applications. The last two decades have seen intensive research in piezoelectric theory in an effort to …
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Process variables controlling consistency of carbon nanotube forest growth
… controlled-morphology macroscopic nanocomposites and nanoengineered composites due to theirscale-dependent, tunable physicall properties. Applications include polymer and ceramic matrix nanocomposites (PNCs and CMNCs), nanostiching as laminate interply reinforcement, as well as in supercapacitors, …
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A microfluidic platform for hematopoietic stem cell separation
Microfluidics manipulates, processes, and controls small volumes of fluids in channels or compartments with cross-sectional dimensions on the order of 10-100 µm. By integrating functional components such as channels, actuators, and sensors, and by leveraging characteristic physical phenomena …
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Highly parallelized control programming methodologies using multicore CPU and FPGA for highly dynamic multi-DoF mobile robots, applied to the MIT Cheetah
… of data processing from a large number of high-bandwidth actuators and sensors. To solve this important problem in robotics, I developed parallelized control programming methodologies that effectively utilize the advantages of modern parallel real-time computing technologies: multicore CPU, the …
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Manufacturing of Poly(vinylidene fluoride) and Evaluation of its Mechanical Properties
… piezoelectric properties have proved useful as actuators and sensors. Current manufacturing processes limit PVDF to thin films and restricting their uses largely to sensors. Further applications utilizing the changes in mechanical properties of piezoelectric polymers are being realized. …
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A novel Adaptive Filtering approach to Drive File Identification for Service Environment Replication
… the development of dynamic time series commands that drive the actuators in order to replicate the responses of the actual dynamic system measured separately in its service environment. A novel adaptive filtering approach, called the Pulse Train Filtered-x Least Mean Square algorithm for …
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