Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2007
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| Online Access: | http://hdl.handle.net/1721.1/38702 |
| _version_ | 1826210783255592960 |
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| author | Secord, Thomas W. (Thomas William) |
| author2 | H. Harry Asada. |
| author_facet | H. Harry Asada. Secord, Thomas W. (Thomas William) |
| author_sort | Secord, Thomas W. (Thomas William) |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007. |
| first_indexed | 2024-09-23T14:55:23Z |
| format | Thesis |
| id | mit-1721.1/38702 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T14:55:23Z |
| publishDate | 2007 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/387022019-04-11T06:08:34Z Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators Secord, Thomas W. (Thomas William) H. Harry Asada. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007. Includes bibliographical references. Experiments were performed using commercially available, self-contained, multilayer polypyrrole (PPy) actuators to develop low-order lumped parameter models of actuator electrical, mechanical, and electromechanical behavior. Experimental data were processed using system identification techniques. Both grey box and black box models were identified. The grey box model consisted of a first order electrical network that was linearly and algebraically coupled to a second order viscoelastic model. The black box model incorporated a third order Box-Jenkins structure and achieved model to data residues comparable to the grey box model. When utilizing validation data, the grey box model showed very good performance for loads in the range of 0.5 to 3 N. Overall, the results of system identification experiments suggested that low order, lumped parameter models were adequate to describe the gross behavior of multilayer actuators. An online identification scheme was developed for monitoring polymer electrical impedance and thereby monitoring the degradation state of an actuator. This identification was performed successfully using recursive least squares and least squares for a discrete impedance model. (cont.) Experimental validation data, spanning more than 5 hours of continuous operation, were collected and analyzed. A final contribution of this research was the application PPy linear actuators to a custom-designed humanoid foot. Four linear conducting polymer actuators were used to obtain multifunctional behavior of the overall foot. Jacobian analysis of stiffness and damping was performed for the design. Simulations illustrated that PPy actuators through the use of appropriate electrical excitation can modulate their stiffness characteristics as a function of time to match a desired force versus length relationship. by Thomas W. Secord. S.M. 2007-08-29T20:46:54Z 2007-08-29T20:46:54Z 2007 2007 Thesis http://hdl.handle.net/1721.1/38702 166143201 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 112 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Secord, Thomas W. (Thomas William) Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators |
| title | Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators |
| title_full | Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators |
| title_fullStr | Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators |
| title_full_unstemmed | Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators |
| title_short | Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators |
| title_sort | modeling identification and application of multilayer polypyrrole conducting polymer actuators |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/38702 |
| work_keys_str_mv | AT secordthomaswthomaswilliam modelingidentificationandapplicationofmultilayerpolypyrroleconductingpolymeractuators |