该数据是发动机在怠速、中速和高速运转时候的加速度信号，信号可以用于练习和验证信号处理方法。对于那些编了程序，而到处寻找测试数据的朋友很有用。里面的数据很完备。-The data is the engine acceleration signal at idle speed and high-speed operation time, the signal can be used to practice and verification of signal processing methods.