Iranian Society of Acoustics and Vibration and Avecina Journal of Theoretical and Applied Vibration and Acoustics 2423-4761 12 1 2026 01 01 Innovative mechanism design for data mining and enhanced gear misalignment detection via vibration analysis 732816 10.22064/tava.2025.2070794.1274 EN Amirhossein Amirnia Condition Monitoring Center, Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran Somaye Mohammadi Condition Monitoring Center, Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran 0000-0003-3418-3987 Mehdi Behzad Condition Monitoring Center, Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran 0000-0002-4042-6503 Journal Article 2025 09 05 With the rapid and continuous advancement of industry and considering the vital role of gearboxes in various machines and industrial systems, condition monitoring and maintenance of these systems are of great importance. One of the most common faults in industrial gearboxes is the occurrence of misalignment between meshing gears. The presence of misalignment provides favorable conditions for the development of gear and bearing defects. Given the widespread use of helical gears in most industrial gearboxes, a deeper investigation of their behavior under misalignment conditions is required. In this study, to bring simulations closer to real-world and industrial cases, experiments are conducted on an industrial gearbox operating under gear misalignment. A dedicated mechanism has been designed and fabricated to impose controlled misalignment. After data acquisition and extraction of vibration signals, a total of nine features is calculated and analyzed. The results reveal that among the extracted features, Energy Ratio and Kurtosis exhibited the highest percentage variations relative to the aligned condition. Furthermore, detailed analysis shows that these features demonstrated more significant increases in the horizontal direction and at measurement points closer to the meshing location of the misaligned gears compared to the aligned state. https://tava.isav.ir/article_732816_b1b32d9c47ad8b37c7388e1ae130e996.pdf