A New Low-Profile Electromagnetic-Pneumatic Actuator for High-Bandwidth Applications
Bibliographic record
Abstract
This paper proposes a new electromagneticpneumatic actuator with high force density for wide bandwidth applications. The actuator includes an active electromagnetic actuator and a pneumatic spring, fused together into a hybrid design. The electromagnetic component acts as an active element, generating wide bandwidth high-density forces. It further provides a baseline stiffness, for the device, using its magnetic spring. The active electromagnetic actuator consists of a number of stacks positioned in a vertical arrangement. The modular design of the actuator, allows for reconfiguring the device with different number of stacks to adjust the strokes, depending on the target application. The pneumatic spring is then responsible for adding extra stiffness and support for heavy load masses. The added stiffness by the pneumatic spring can be easily adjusted by regulating the gas pressure. Based on the proposed active electromagnetic actuator, analytical and FEM models are developed, which are used for optimizing the design. The proposed actuator has a lowprofile design, making it suitable for many applications with space limitations. The final design is prototyped, and experimentally tested. To evaluate the performance of the electromagnetic component, its force density (force to volume ratio) is compared with a voice coil actuator (that is widely used in both academic and industrial sectors). The FEM and experimental results confirmed the high force density of the electromagnetic component, comparing to a voice coil of similar size. The proposed design, with a diameter of ~125 mm and a height of ~60 mm, generates a force variation of ~ 318 N for the currents of I = ±2 A. Furthermore, it has small electromagnetic and electromechanical time constants of 5.2 and 10.5 ms, respectively, with negligible eddy current effect. These findings make the actuator suitable for wide bandwidth applications.
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How this classification was reachedexpand
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) | 0.001 | 0.001 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".