最小二乘法在铁路振动信号预处理中的应用

The Least Square Method in the Application of Railway Vibration Signal Preprocessing

铁路垂向振动加速度信号可以由加速度传感器测得,但由于外界的各种干扰,数据往往呈现出非光滑性的特点,并且偏离了真实的数值,给模型的建立、参数估计带来误差。所以,在进行系统分析之前,要对测得的信号数据进行预处理。介绍了最小二乘法,并在M A T LA B软件上以实际案例进行了算法验证。结果表明,通过该方法处理后的信号质量有着较为显著的改善。

Through the acceleration sensor acquisition to the vibration acceleration of railway signal often present a non-smooth characteristics due to interference, and deviates from the true value, bringing error for the establishment of the model and parameter estimation. Therefore, the preprocessing of vibration signal is very important. The paper discuss the eliminating method of polynomial trend term on MATLAB software platform for the algorithm validation. The results show that the processed signal quality has been improved obviously.