Uniform damping node control theory utilizing shaped Piezoelectric film
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The Ohio State University / OhioLINK
2001
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1413363841 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu14133638412021-08-03T06:27:41Z Uniform damping node control theory utilizing shaped Piezoelectric film Isler, Bruce Ryan Mechanical Engineering There have been many active vibration control systems implemented using smart materials. These vibration suppression systems usually require separate sensors and actuators, which are placed according to criteria established based on collocation issues and actuation authority. Uniform Damping Control (UDC) is a method of vibration suppression with characteristics that make it desirable for many applications. It is a method of control that dampens motion over an entire structure by damping to every mode of vibration at the same decay rate. It is advantageous because the natural modes and the natural frequencies of the structure are not altered, allowing for energy-efficient vibration control. In addition to UDC, Node Control Theory (NCT) provides a means for actuator and sensor placement. NCT states that one can control the lowest N modes participating in a response by placing discrete sensor/actuator pairs at the nodes of the (N+l) mode. Utilizing NCT leads to a controlled system with that has frequency and modal invariance and uniform damping.In this thesis, UDC and NCT were used together to implement Uniform Damping Node Control (UDNC) to control the vibrations of a cantilevered beam. The control algorithm was implemented using shaped polyvinylidene fluoride (PVDF) film, which provided point forces at the locations designated by the UDNC theory. The experiment was initially run with external point displacement sensors used for feedback control. The results obtained were in agreement with the properties of UDNC.A secondary objective of this thesis was to eliminate the external point displacement sensors. Self-sensing piezoelectric actuators were investigated, but a self-sensing PVDF actuator was never successful. Next, utilizing shaped PVDF sensors was considered. An analytical study was performed in Matlab, and it demonstrated that pennant shaped sensors could be utilized to simulate point sensors. An experiment was run to test these analytical predictions, and the results validated that the pennant shaped PVDF sensor simulates a point sensor. Finally, UDNC was implemented utilizing pennant shaped sensors and actuators. 2001 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1413363841 http://rave.ohiolink.edu/etdc/view?acc_num=osu1413363841 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Mechanical Engineering |
| spellingShingle |
Mechanical Engineering Isler, Bruce Ryan Uniform damping node control theory utilizing shaped Piezoelectric film |
| author |
Isler, Bruce Ryan |
| author_facet |
Isler, Bruce Ryan |
| author_sort |
Isler, Bruce Ryan |
| title |
Uniform damping node control theory utilizing shaped Piezoelectric film |
| title_short |
Uniform damping node control theory utilizing shaped Piezoelectric film |
| title_full |
Uniform damping node control theory utilizing shaped Piezoelectric film |
| title_fullStr |
Uniform damping node control theory utilizing shaped Piezoelectric film |
| title_full_unstemmed |
Uniform damping node control theory utilizing shaped Piezoelectric film |
| title_sort |
uniform damping node control theory utilizing shaped piezoelectric film |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2001 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1413363841 |
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AT islerbruceryan uniformdampingnodecontroltheoryutilizingshapedpiezoelectricfilm |
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