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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Omidi, Ehsan Mahmoodi, S. Nima |
| Copyright Year | 2015 |
| Abstract | Multimode modified positive position feedback (MMPPF) is proposed to suppress vibrations at multi-resonance frequencies in flexible collocated structures. Typically, flexible structures have large numbers of active modes in low frequency bandwidths, which make them susceptible to multi-frequency resonant vibrations. Hence, it is essential for the controller to have effective suppression on all participating modes. The MMPPF controller consists of a first- and a second-order compensator for each mode, as they are all set parallel for all active modes. Because of suppression performance sensitivity to controller gain parameters, proper gain selection is essential. Here, the linear quadratic regulator (LQR) approach and a proposed method called M-norm are used for gain optimization of the MMPPF controller. The optimized controller is then evaluated experimentally using a cantilever beam, enhanced by a piezoelectric actuator. According to the obtained results, the MMPPF controller reduces vibration amplitudes to the expected lower level, under both LQR and M-norm optimization methods. In some cases, vibration amplitude at the place of piezo-actuator is reduced to even less than the vibration amplitude level of the disturbance input at clamped end. |
| Starting Page | 051003 |
| Ending Page | 051009 |
| Page Count | 7 |
| File Format | |
| ISSN | 00220434 |
| Journal | Journal of Dynamic Systems Measurement and Control |
| Volume Number | 137 |
| Issue Number | 5 |
| DOI | 10.1115/1.4029030 |
| e-ISSN | 15289028 |
| Language | English |
| Publisher | The American Society of Mechanical Engineers |
| Publisher Date | 2015-05-01 |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Cantilever beams Control equipment Feedback Flexible structures Optimization Piezoelectric actuators Resonance Vibration |
| Content Type | Text |
| Resource Type | Article |
| Subject | Instrumentation Control and Systems Engineering Computer Science Applications Mechanical Engineering Information Systems |
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