轿车电动座盆振动测试系统研究

提出基于加速度传感器的轿车电动座盆的振动测试系统方案,座盆在设备上夹紧后,采用大功率直流电源通过接触器给座盆电机供电,用PLC控制接触器的通断和电机的供电电流方向,使座盆能够在水平、垂直、仰角三个方向上进行正反转,在座盆运动前将加速度传感器紧贴与座盆滑轨下方正中位置.在座盆运动过程中采集加速度传感器的信号,并用LabVIEW编程软件对信号进行处理,从而获得滑轨振动的峭度、峰值、峰峰值、均方根幅值等参数,将这些参数与要求的合格范围进行比较判断合格与否.实验研究表明:系统的振动动态检测范围0-120dB,分辨率为0.0005g,并可以长期稳定运行.

The Research of Car Cushion Vibration Test System

At vibration test system of car cushion based on acceleration sensor is presented.When cushion is clamped,the high-power DC power supply is conected to cushion’s motors by contactor,Contactor ON/OFF and the direction of motor’s current are controlled by PLC.Cushion can run forward or reverse at horizontal,vertical and tilt direction.Two acceleration sensors are cling underside of each cushion rack before cushion movement.The computer samples the signal of acceleration sensor in the process of cushion movement and process the signal by LabVIEW to acquire the parameter of cushion vibration such as kurtosis,peak,P-P value,RMS,and compared with prescribe parameter as result of test.The experiment results show that the system dynamic test range is 1-120dB,acceleration sensor resolution is 0.0005g,and the test system can steady run in long time.