Robust control technique for active vibration control of plate-like structures using piezoelectric materials /
Vibration control in designing any structural system has been an active topic for decades. Ordinary controllers designed based on nominal parameters do not take into account the uncertainties present in and around the system and hence lose their effectiveness when subjected to uncertainties. To over...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
Kuala Lumpur :
Kulliyyah of Engineering, International Islamic University Malaysia,
2015
|
| Subjects: | |
| Online Access: | http://studentrepo.iium.edu.my/handle/123456789/5193 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Vibration control in designing any structural system has been an active topic for decades. Ordinary controllers designed based on nominal parameters do not take into account the uncertainties present in and around the system and hence lose their effectiveness when subjected to uncertainties. To overcome this, a robust control system that accommodates uncertainties is crucial. In this research, robust control of vibration of a thin plate coupled with piezoelectric patches is investigated. An analytical solution for estimating the changes in eigenvalues of a plate-like structure when subjected to structural uncertainties is derived. The derived estimation of eigenvalue perturbation is represented in terms of changes in mass and stiffness. The results obtained from the proposed estimation can be used to estimate worst case of uncertainties with insignificant computational effort as compared to traditional estimation techniques such as Monte Carlo method. A robust controller is designed using µ-synthesis approach to control vibration at first and second modal frequencies of a thin plate attached with two piezoelectric patches, in the presence of uncertainties in the mass of the plate. Results obtained from numerical simulation indicate that the designed controller can effectively suppress the vibration of the system at the first and second modal frequencies despite the presence of structural uncertainties |
|---|---|
| Physical Description: | xiii, 123 leaves : ill. ; 30cm. |
| Bibliography: | Includes bibliographical references (leaves 93-97) |