東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Online Parameter Estimation and Adap...

Karve, Harshwardhan.

FindBook

Google Book

Amazon

博客來

Online Parameter Estimation and Adaptive Control of Magnetic Wire Actuators.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Online Parameter Estimation and Adaptive Control of Magnetic Wire Actuators./
作者:	Karve, Harshwardhan.
面頁冊數:	106 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-11(E), Section: B.
Contained By:	Dissertation Abstracts International77-11B(E).
標題:	Electrical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10119396
ISBN:	9781339806303

Online Parameter Estimation and Adaptive Control of Magnetic Wire Actuators.
Karve, Harshwardhan.

Online Parameter Estimation and Adaptive Control of Magnetic Wire Actuators. - 106 p.

Source: Dissertation Abstracts International, Volume: 77-11(E), Section: B.

Thesis (Ph.D.)--Clemson University, 2016.

Cantilevered magnetic wires and fibers can be used as actuators in microfluidic applications. The actuator may be unstable in some range of displacements. Precise position control is required for actuation. The goal of this work is to develop position controllers for cantilevered magnetic wires.

ISBN: 9781339806303Subjects--Topical Terms:

649834
Electrical engineering.

Online Parameter Estimation and Adaptive Control of Magnetic Wire Actuators.
LDR:03992nmm a2200349 4500 001 2114877
005 20161128141931.5
008 180830s2016 ||||||||||||||||| ||eng d
020 $a 9781339806303
035 $a (MiAaPQ)AAI10119396
035 $a AAI10119396
040 $a MiAaPQ $c MiAaPQ
100 1 $a Karve, Harshwardhan. $3 3276492
245 1 0 $a Online Parameter Estimation and Adaptive Control of Magnetic Wire Actuators.
300 $a 106 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-11(E), Section: B.
500 $a Adviser: Richard E. Groff.
502 $a Thesis (Ph.D.)--Clemson University, 2016.
520 $a Cantilevered magnetic wires and fibers can be used as actuators in microfluidic applications. The actuator may be unstable in some range of displacements. Precise position control is required for actuation. The goal of this work is to develop position controllers for cantilevered magnetic wires.
520 $a A simple exact model knowledge (EMK) controller can be used for position control, but the actuator needs to be modeled accurately for the EMK controller to work. Continuum models have been proposed for magnetic wires in literature. Reduced order models have also been proposed. A one degree of freedom model sufficiently describes the dynamics of a cantilevered wire in the field of one magnet over small displacements. This reduced order model is used to develop the EMK controller here.
520 $a The EMK controller assumes that model parameters are known accurately. Some model parameters depend on the magnetic field. However, the effect of the magnetic field on the wire is difficult to measure in practice. Stability analysis shows that an inaccurate estimate of the magnetic field introduces parametric perturbations in the closed loop system. This makes the system less robust to disturbances. Therefore, the model parameters need to be estimated accurately for the EMK controller to work. An adaptive observer that can estimate system parameters on-line and reduce parametric perturbations is designed here.
520 $a The adaptive observer only works if the system is stable. The EMK controller is not guaranteed to stabilize the system under perturbations. Precise tuning of parameters is required to stabilize the system using the EMK controller. Therefore, a controller that stabilizes the system using imprecise model parameters is required for the observer to work as intended. The adaptive observer estimates system states and parameters. These states and parameters are used here to implement an indirect adaptive controller. This indirect controller can stabilize the system using imprecise initial parameter estimates. The indirect adaptive controller overcomes the limitations of the EMK controller by stabilizing the closed loop system despite inaccurate initial parameter estimates.
520 $a The experiment setup used to test the controllers is also presented. Experiments were performed to test the adaptive controller using cantilevered cobalt and nickel wires. The closed loop system using the indirect controller is stable. The wire tracks continuous desired trajectories up to 30Hz. Experiments were also performed to test the robustness of the adaptive and EMK controllers when the wire is interacting with water.
520 $a The adaptive controller performs poorly when unmodeled disturbances are encountered, necessitating fall back to the EMK controller in some applications. The adaptive controller functions as an EMK controller if observer gain is set to 0. Thus, the indirect adaptive controller estimates model parameters, stabilizes the wire in the unstable region and can be switched into a non-adaptive mode for applications.
590 $a School code: 0050.
650 4 $a Electrical engineering. $3 649834
650 4 $a Materials science. $3 543314
650 4 $a Mechanics. $3 525881
690 $a 0544
690 $a 0794
690 $a 0346
710 2 $a Clemson University. $b Electrical and Computer Engineering. $3 2094886
773 0 $t Dissertation Abstracts International $g 77-11B(E).
790 $a 0050
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10119396