Heavy-Duty Truck Axle End-of-Line Quality Test - Gear Mesh Noise

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Test Object:Heavy-Duty Truck Axles

Application Scenario:End-of-Line Quality Test

Challenges:

The main axle noise comes from the single-frequency gear mesh noise, making it easily audible even under the loud engine noise.

Method of Evaluation:

On the EOL test bench, speed, torque, vibration of the main and hub reducers are collected, and order analysis is performed during the uniform acceleration and deceleration of the axle. Figure 2 shows that the order spectrum amplitude of defective products is significantly higher than that of qualified products with the sideband of 1st order (input shaft order).

Figure 1: Axle under EOL quality test

Figure 2: Order spectrum of qualified (black) and defective (red) products

Figure 3: Real-time test results as displayed on SigMA