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Improved Vibration Suppression of a Piezoelectric Lead Zirconate Titanate (PZT) Actuator Slender Beam Using Complex Mode Phase Compensation |
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| รหัสดีโอไอ | |
| Title | Improved Vibration Suppression of a Piezoelectric Lead Zirconate Titanate (PZT) Actuator Slender Beam Using Complex Mode Phase Compensation |
| Creator | Paul Bland |
| Publisher | Thai Society of Mechanical Engineers |
| Publication Year | 2557 |
| Keyword | Vibration suppression, control, complex modes. |
| Abstract | Active vibration suppression systems require a controlled force system to be applied to astructure with the correct frequency content, but also with the correct phase for each mode. If it isassumed that the structure has only real modes, but one or more complex modes are present, then the phase of the suppressive force may at best be slightly misaligned leading to non-optimum suppression, and at worst contribute to increasing the energy in the mode. This paper presents an experimental study of vibration excitation, sensing and control of a slender cantilever beam mounted with a PZT actuator and control loop using a laser displacement sensor as its reference input. Previous work had identified both non-linear and complex modal behaviour of the same experimental set up, giving a measure of the presence of complex modes. The performance of various control algorithms was experimentally compared, using combinations of displacement and/or velocity terms, varying the control coefficients, as well as repeating tests with and without phase compensation to take into account the presence of a complex mode. It is shown that the inclusion of the consideration of the presence of complex modes improves the control performance. |
