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 33 for “"smart material"”.
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Smart material composites for magnetic field and force sensors
Piezoelectric material based sensors are widely used in applications such as automobiles, aircraft, and industrial systems. In past decade, attention has been focused on synthesizing composites that can provide multifunctional properties, i.e., same material exhibits two or more properties. In this …
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Design and Development of High-Frequency Switching Amplifiers Used for Smart Material Actuators With Current Mode Control
… switching amplifiers used to drive the so-called smart material actuators. Different from conventional circuits, a smart material actuator is ordinarily a highly capacitive load. Its capacitance is non-linear and its strain is hysteretic with respect to its electrical control signal. This …
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Full-Scale Testing Of A Passively Modulated Oil-To-Air Cooler
… by the gas turbine engine. Implementing smart materials into this system would allow autonomous, passive, and lightweight modulation of the oil cooling system. Using smart material actuators to control the cooler’s heat exchanger air intake based on a target oil temperature range will …
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Dynamics of smart materials in high intensity focused ultrasound field
Smart materials are intelligent materials that change their structural, chemical, mechanical, or thermal properties in response to an external stimulus such as heat, light, and magnetic and electric fields. With the increase in usage of smart materials in many sensitive applications, the need for a …
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Rethinking emergency habitats for refugees : balancing material innovation and culture
… permanent housing. An environmentally friendly 'smart' material is proposed, based on case studies, material tests, experiments and literature research. This is not just a limited shelter solution, but goes beyond construction to include a balanced combination of building technology, material …
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Distributed force model for arbitrarily shaped IMPC actuators
… composites (IPMC), a type of electroactive smart material. The model in this thesis couples a finite element force simulation for IPMC with a novel method of performing force measurements for IPMC actuators. The model is capable of predicting the blocked force output for IPMC actuators of …
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Functionalized Shape Memory Alloy Microfilament Twisted Yarn Structures
The materials available to society define the substance of civilization. Continuous innovations in material science through history have enabled groundbreaking applications and technologies. The emergence of smart materials is revolutionizing the way we interact with everyday objects by providing …
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The application of visualisation tools to enable architects to explore the dynamic characteristics of smart materials in a contemporary Shanashil building design element for hot arid climates
… arid climates. This research seeks to select a smart material which mimics the dynamic characteristics observed in nature, inspired from biomimetics, taking into consideration the role of sustainable development. Such qualities are found in the characteristics of smart dynamic glazing material …
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Reinforced concrete : applicability of smart materials
… Reinforced concrete, one of the most widely used materials, can be reinvented using this philosophy. In this thesis, smart materials are classified as materials which can provide sensing, actuation or self-repair. Three different smart materials were studied including self-healing concrete which …
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E-broidery : an infrastructure for washable computing
… Fabrics are perhaps the first composite materials engineered by humanity; their evolution led to the development of the Jacquard loom, which itself led to the development of the modern computer. The development of fabric circuitry is a compelling closure of the cycle that points to a new …
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Active Vibration Isolation Using an Induced Strain Actuator with Application to Automotive Seat Suspensions
… active vibration isolation system incorporating smart materials is designed, built, and tested. Human sensitivity to vibration is discussed. Characteristics of road roughness are discussed and used to implement a representative test input to a passenger seat system. extsc{Matlab} is used to model …
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A Novel Magnetorheological Fluid Damper for a Small Spacecraft with Flexible Appendages
… model. The design takes advantage of a smart material known as a magnetorheological (MR) fluid that was initially created in the 1940s, but has been subject to renewed interest over the past 30 years. A numerical model of the damper system is described and test articles with …
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Application of smart materials for vibration reduction in ships
Smart Materials have been investigated for decades and widely used in the automotive and aeronautics industries to measure and control noise and vibration. This study covered ship structure vibration and Smart Materials were employed for the purpose of ship vibration attenuation. One specific Smart …
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Dual Mode Macro Fiber Composite-Actuated Morphing Tip Feathers for Controlling Small Unmanned Aircraft
… in alternative control surfaces and uses for smart materials. A Macro Fiber Composite (MFC), a smart material, takes advantage of the piezoelectric effect and provides an attractive alternative actuator to servos in the Small Unmanned Aerial Systems (SUAS) regime of flight. This research looks …
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Piezoelectric active sensor and electric impedance approach for structural dynamic measurement
The increasing use of piezoelectric material in the last decade has led to the new discovery that piezoelectric devices may be used not only as sensors or actuators individually, but also as a sensor and actuator at the same time. This bi-directional phenomenon greatly expands the utility of …
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Piezoelectric Micro Power Generator (PMPG) : a MEMS-based energy scavenger
As MEMS and smart material technologies begin to mature, their applications, such as medical implants and wireless communications are becoming more attractive. Traditionally, remote devices have used chemical batteries to supply their energy. However, batteries are no longer suitable for many of …
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Characterisation and Modelling for Elastomeric and Gel-Like Magnetorheological Materials
Magnetorheological (MR) material is an aspiring branch of smart material. It can change its mechanical properties rapidly and reversibly subjected to an externally applied magnetic field, so-called MR effect. Due to the sensitivity to magnetic field and the versatility in physical states, i.e., …
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PROCESSING AND CHARACTERIZATION OF TINI-BASED ALLOYS FABRICATED BY LASER AIDED MANUFACTURING
… alloy is a type of shape memory alloy (SMA), a smart material with unique shape memory effects. Using laser powder DED to synthesize TiNi-based SMAs from elemental powder mixture can create more possibilities in new compositions and properties. It can also overcome the limitations of …
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Modulation Of Hydrodynamic Forces On Oscillating Submerged Structures In Viscous Fluids
… fan systems, biomimetic robotic propulsion, and smart material-based energy harvesting devices.
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Deployment and on-orbit shape modifications for a large space telescope using magnetostriction
… and then deployed in space. Thanks to a magnetic smart material coating and a magnetic write head, post deployment corrections will be applied to the surface figure. The feasibility study of the concept has been done in the context of a NIAC Phase I study which is the result of a collaboration …
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