A study of semiactive controls and applications.
| dc.contributor.advisor | Patten, William Neff, | en_US |
| dc.contributor.author | Lee, Jae-soo. | en_US |
| dc.date.accessioned | 2013-08-16T12:30:20Z | |
| dc.date.available | 2013-08-16T12:30:20Z | |
| dc.date.issued | 1998 | en_US |
| dc.description.abstract | The work begins with the validation of the hydraulic behavior of SAVA via experiment using both single- and two-degree-of-freedom test setups. The work demonstrates that the behavior of the SAVA remains closely tied to the Reynolds number of flow through a valve orifice. In addition the results indicate that for an exact analysis of SAVA, the frictional force between the piston body and the cylinder body should also be included. | en_US |
| dc.description.abstract | This dissertation is devoted to three objectives: (1) the development of a method to estimate the damping characteristics of a hydraulic semiactive vibration absorber (SAVA), (2) the determination of bi-state control gains for a SAVA controller, and (3) the selection of an effective control scheme (among various control algorithms) for the closed loop operation of a system equipped with a SAVA. | en_US |
| dc.description.abstract | The dissertation next reports the results of an investigation of how best to craft a Lyapunov control for the SAVA system. An analytical way to determine the control gains of a bi-state controller is presented. The stability of the SAVA system is also considered and it shows that, given a bounded disturbance, the SAVA system will remain stable. Finally, the work reports experimental verification of a bi-state controller using a two-degree-of-freedom (TDOF) system. | en_US |
| dc.description.abstract | While significant advances have been made in the study of semiactive hydraulic systems, there is still a need to further explore the issue of how to control a semiactive actuator. One key question that has hereto for remained unanswered is; among the many control rules posed for use with semiactive system, which gives the best performance. The purpose of this dissertation is to provide a comprehensive answer to that question. That task was accomplished here. To the author's knowledge, this is the first time. A comprehensive comparison of competing semiactive bi-state controllers has appeared in the open literature. | en_US |
| dc.description.abstract | Finally, the dissertation reports on a comparative analysis of various control architectures for the SAVA system. The work contrasts the performance of heuristic as well as analytical control algorithms. | en_US |
| dc.format.extent | xxii, 158 leaves : | en_US |
| dc.identifier.uri | http://hdl.handle.net/11244/5723 | |
| dc.note | Source: Dissertation Abstracts International, Volume: 59-11, Section: B, page: 6037. | en_US |
| dc.note | Major Professor: William Neff Patten. | en_US |
| dc.subject | Engineering, Mechanical. | en_US |
| dc.subject | Hydraulic control. | en_US |
| dc.subject | Damping (Mechanics) | en_US |
| dc.thesis.degree | Ph.D. | en_US |
| dc.thesis.degreeDiscipline | School of Aerospace and Mechanical Engineering | en_US |
| dc.title | A study of semiactive controls and applications. | en_US |
| dc.type | Thesis | en_US |
| ou.group | College of Engineering::School of Aerospace and Mechanical Engineering | |
| ou.identifier | (UMI)AAI9911856 | en_US |
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