A Parameter-Free Vibration Analysis Solution for Legacy Manufacturing Machines’ Operation Tracking
Bibliographic record
Abstract
Despite the fact that the revolution of Industry 4.0 has started almost a decade ago, there are still many yesteryear's manufacturing machines that are still currently in operation in many small and medium enterprises (SME) factories. These legacy manufacturing machines are built without computing power and Internet connectivity. Therefore, the process of gathering operational information of such systems is often done manually. This article aims to automatically track these machines' operation status via the vibration produced by these machines, by using a retrofit Internet-of-Things (IoT) approach that attaches wireless vibration sensors onto legacy manufacturing machines to capture the vibration of the machines. One of the challenges of the proposed retrofit approach is to interpret the meaning of the vibration without any prior knowledge of the machine's vibration and also without the privilege to interrupt the manufacturing process to produce data sets with labels. Although there are many existing works that capture and analyze vibration, they very often only focus on fault diagnosis and prognosis. Also, many of these vibration analysis techniques are not parameter free; i.e., parameters need to be fine-tuned according to the data. The contribution of this article is the proposal of a parameter-free vibration analysis technique to cluster and classify the type of vibrations produced by a machine. Experiments, which were carried out in a limestone processing factory on real industrial machineries, show that the proposed technique is able to track the operation status of a 3-speed industrial exhaust fan with an average accuracy of 98.6% (worst case 95.5%) and standard uncertainty of 1.06%.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".