An improved electromechanical model and parameter identification technique for piezoelectric actuators
Why this work is in the frame
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Bibliographic record
Abstract
Piezoelectric actuators are often modeled as a lumped mass system in the mechanical domain and as a capacitive element in the electrical domain. Based on a real-time capacitance measurement, it is observed that the piezoelectric capacitance is a function of voltage. This leads to a modification of the traditional piezoelectric actuator model where the capacitance is usually considered constant. A voltage-dependent capacitance term is introduced in the constitutive equations in the electrical domain, and it is demonstrated that this term satisfies a power balance. Then, a novel parameter identification technique is proposed for the modified constitutive equations. The advantage of this identification technique lies in its simplicity that requires only a single experiment to identify all pertinent model parameters. In addition, the hysteresis voltage is conveniently extracted from the applied voltage for a large frequency range. In comparison to the traditional parameter identification procedure and electromechanical models, the proposed technique along with the modified model provides an improved fitting of the parameters. The new model and its identification technique can be applied to sensorless position control applications where exact models are the basis for robust control system designs.
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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 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| 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