A Vibration Online Measurement System for Car Door

The structural properties of automobile door have important influence on the safety and reliability of the vehicle. In order to obtain the actual working vibration characteristics of vehicle door, firstly, according to the complex condition, sensors arrangement scheme was determined based on the vibration mode characteristics of the door system that under force hammer excitation; secondly, a car door on-line vibration measurement system was built; then, vibration measurement test was done under level load, pavement with a reduction bar and macadam pave conditions. Results show: The system can measure the door vibration signal in real time and realize the signal frequency characteristics analysis.