Goals:

• Designing a bearings quality control system for passenger cars maintenance workshop
• Identifying hidden defects for passenger cars bearings

Importance of the issue:

• Prevent the accident and Increasing safety
• Decreasing the cars stoppage on the way and decreasing costs and delay of railway

Results:

• Designing and Implementing of a passenger cars bearings quality control system by vibration and noise analysis
• Control of 45,000 bearings during 3 years
• Detecting about 1800 hidden defects or doubtful items
• Decreasing cost _ about 1.2 million $