Experimental validation of a semi-active friction control device
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Bibliographic record
Abstract
In this paper, the experimental validation of a semi-active vibration reduction strategy is presented where energy is dissipated by dry friction contact surfaces. The aim of this project is to develop a semi-active friction compact device which can be bonded to any light flexible structure. The prototype presented in this paper incorporates two piezoelectric stack actuators used to apply a normal force between a mobile inertial component and two friction pads. This force is controlled so that the distance between the two surfaces is neither too small (to avoid shock and stiction that can cancel the slip between the two surfaces and then the friction effect) or too large (loss of contact surfaces). In order to avoid <i>spillover effects</i> found with the nonlinear control law leading to a bang-bang control, a lead-phase strategy is proposed for the controller. The friction model that was used to develop the controller is first introduced. The parameters of these models are determined experimentally and the friction force obtained from the model is compared with experimental measurements of this force. The piezoelectric stack actuator is then characterized with respect to the friction force generated. The friction model is then used to predict the controller performance for energy dissipation. The implementation of the controller is presented, together with the strategy adopted for the adjustment of the parameters of the controller. Control experiments are conducted on the prototype device and experimental results are presented to assess the performance of the controller.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it