Materials and Electromechanical Engineering of a Haptic System
| dc.contributor.advisor | Ajayan, Pulickel | en_US |
| dc.contributor.advisor | O'Malley, Marcia | en_US |
| dc.creator | Ojha, Ved | en_US |
| dc.date.accessioned | 2022-09-26T19:22:56Z | en_US |
| dc.date.created | 2022-05 | en_US |
| dc.date.issued | 2022-04-22 | en_US |
| dc.date.submitted | May 2022 | en_US |
| dc.date.updated | 2022-09-26T19:22:56Z | en_US |
| dc.description | EMBARGO NOTE: This item is embargoed until 2028-05-01 | en_US |
| dc.description.abstract | Haptic technologies are set to play a key role in the design of next generation human-computer interfaces. While haptic feedback is being leveraged in areas such as consumer electronics, there is much to be done to create haptic systems that add value to our daily life. With the coming AR/VR revolution, wearables that add a sense of touch will enable truly immersive experiences. Haptic feedback is already augmenting professional training simulators used by astronauts, surgeons, soldiers to optimize learning routines. In other applications, haptic interfaces have already been shown to enable the deaf to "hear" again and the blind to navigate through environments with greater accuracy. Haptic feedback, therefore, is poised to redefine communications technology as a whole. I have explored actuation technologies, actuators with advanced polymers for generating crisp haptic feedback, data processing techniques and software design for triggering complex haptic patterns using sound signals, and low cost electronic design methodologies for driving arrays of electromagnetic actuators. I have demonstrated the above by designing a portable haptic vest using 112 eccentric rotating mass actuators, a haptic sleeve with 8 linear resonant actuators, and demonstrated a PVDF-TrFE polymer based piezoelectric actuator as a flexible and biocompatible alternative to traditional actuation technologies. A drawback that plagues most haptic systems is high power consumption, especially when operating at peak loads. When constructing energy efficient portable haptic systems, one must use an energy storage device capable of delivering high power while maintaining a stable energy density. Current lithium-ion batteries used in consumer electronics are energy dense but have low rate capability. I have explored a system known as a hybrid supercapacitor using a novel \ch{rGO/Nb2O5} nanocomposite anode, capable of delivering high energy at high current rates. As an intermediate energy storage device between batteries and supercapacitors it is ideal for analyzing the limitations of current energy storage systems and designing future energy solutions. | en_US |
| dc.embargo.lift | 2028-05-01 | en_US |
| dc.embargo.terms | 2028-05-01 | en_US |
| dc.format.mimetype | application/pdf | en_US |
| dc.identifier.citation | Ojha, Ved. "Materials and Electromechanical Engineering of a Haptic System." (2022) Diss., Rice University. <a href="https://hdl.handle.net/1911/113391">https://hdl.handle.net/1911/113391</a>. | en_US |
| dc.identifier.uri | https://hdl.handle.net/1911/113391 | en_US |
| dc.language.iso | eng | en_US |
| dc.rights | Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder. | en_US |
| dc.subject | Haptics | en_US |
| dc.subject | sound | en_US |
| dc.subject | actuator | en_US |
| dc.subject | battery | en_US |
| dc.subject | supercapacitor | en_US |
| dc.title | Materials and Electromechanical Engineering of a Haptic System | en_US |
| dc.type | Thesis | en_US |
| dc.type.material | Text | en_US |
| thesis.degree.department | Materials Science and NanoEngineering | en_US |
| thesis.degree.discipline | Engineering | en_US |
| thesis.degree.grantor | Rice University | en_US |
| thesis.degree.level | Doctoral | en_US |
| thesis.degree.name | Doctor of Philosophy | en_US |