Five-degree-of-freedom magnetic control of micro-robots using rotating permanent magnets
Why this work is in the frame
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Bibliographic record
Abstract
Recent work in magnetically-actuated micro-scale robots for biomedical or microfluidic applications has resulted in electromagnetic actuation systems which can command precise five-degree-of-freedom control of simple magnetic devices at the sub-millimeter scale in remote environments. This paper presents a new type of actuation system which uses an array of large, rotatable, permanent magnets to generate the same level of control over untethered micro-robotic systems with the potential for increased field and gradient strength and minimal heat generation. We show that the system can produce any field or field gradient at the workspace (including a value of zero). In contrast with previous permanent magnet actuation systems, the system proposed here accomplishes this without any hazardous translational motion of the control magnets, resulting in a simple, safe, and inexpensive system. The proof-of-concept prototype system presented, with eight permanent magnets, can create fields and gradients in any direction with strength of 30 mT and 0.83 T·m-1, respectively. The effectiveness of the system is shown through characterization and feedback control of a 250 μm micro-magnet in a path-following task with average accuracy of 39 μm.
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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) | 0.002 | 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