Investigation of Partial Discharge in Aircraft Conformally-Coated Printed Circuit Boards
Bibliographic record
Abstract
Printed circuit boards (PCB) are key components of any electronic system. The reliability of PCBs under operating conditions is an important factor to ensure the performance of the system. In recent years, the electrical power demand in more-electric aircraft has significantly increased. To provide more power, the operating voltage is increased which imposes a higher level of electrical stress on the insulation system of PCBs and, therefore, a higher risk of failure. Partial discharges in PCBs are more likely to happen within the air gap. To improve the insulation of PCBs, they are coated with an insulation material. In this study, test boards with two parallel traces were fabricated and coated based on aerospace industry approved standards. The boards were energized using a 60-Hz adjustable high voltage source. Partial discharges were measured for silicone-coated test boards under pollution and conductive particles conditions. The impact of pollution location on partial discharge was investigated. Besides, the breakdown voltage of test boards was measured under different coating conditions and low air pressure. An increased withstand voltage for coated boards was confirmed.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".