Controlling Unwanted Vibrations on Smart Devices
Grade Level at Time of Presentation
Senior
Major
Mathematics
Minor
Computer Science
2nd Grade Level at Time of Presentation
Senior
2nd Student Major
Mathematics
3rd Grade Level at Time of Presentation
Senior
3rd Student Major
Mathematics
3rd Student Minor
Physics
Institution
Western Kentucky University
KY House District #
20
KY Senate District #
32
Faculty Advisor/ Mentor
Ahmet Ozkan Ozer, Ph.D.
Department
Department of Mathematics
Abstract
Smart devices are multi-layered structures with perfectly bonded active and passive layers. Active layers could be chosen as piezoelectric materials, a multi-functional smart material being used as both actuator and sensor. These devices are used as part of the highly-functional and constantly vibrating host structures. These unwanted vibrations are the number one cause of fatigue, which decreases the service lifetime of the host structures. At the design level, active piezoelectric layers are chosen for the key layers of the smart devices so that the vibrations on the host structure are suppressed quickly and effectively. Some of these vibrations are also dampened by an intelligent choice of passive viscoelastic layers as part of the smart device.
In this project, we first consider a highly-advanced mathematical model for accurately describing the vibrations on the device where piezoelectric and viscoelastic layers are alternating. Next, we develop an approximation technique and a computational toolbox to estimate these vibrations quickly and reliably. Then, we design the sensor data to make the correct measurements on the device, and, finally, we design a highly effective real-time actuator/controller data through piezoelectric layers. The suppression of the vibrations is achieved in real time in a fraction of a second. The ultimate goal of the project is to provide new insights into the active controlling of smart devices in the market, such as cardiac pacemakers, inchworm robots, and NASA/commercially-operated inflatable space antennas.
Controlling Unwanted Vibrations on Smart Devices
Smart devices are multi-layered structures with perfectly bonded active and passive layers. Active layers could be chosen as piezoelectric materials, a multi-functional smart material being used as both actuator and sensor. These devices are used as part of the highly-functional and constantly vibrating host structures. These unwanted vibrations are the number one cause of fatigue, which decreases the service lifetime of the host structures. At the design level, active piezoelectric layers are chosen for the key layers of the smart devices so that the vibrations on the host structure are suppressed quickly and effectively. Some of these vibrations are also dampened by an intelligent choice of passive viscoelastic layers as part of the smart device.
In this project, we first consider a highly-advanced mathematical model for accurately describing the vibrations on the device where piezoelectric and viscoelastic layers are alternating. Next, we develop an approximation technique and a computational toolbox to estimate these vibrations quickly and reliably. Then, we design the sensor data to make the correct measurements on the device, and, finally, we design a highly effective real-time actuator/controller data through piezoelectric layers. The suppression of the vibrations is achieved in real time in a fraction of a second. The ultimate goal of the project is to provide new insights into the active controlling of smart devices in the market, such as cardiac pacemakers, inchworm robots, and NASA/commercially-operated inflatable space antennas.