Abstract
Dealing with two dimensional acceleration signal as a complex signal on Gaussian plane, the time characteristics of the acceleration vector can be analyzed by Fourier transform on complex form. The spectrum calculated with this method is useful to understand the physical image of two dimensional movements about the acceleration. Therefore, for the quantitative comparison and evaluation of the behavior of two dimensional acceleration data, some evaluate functions and index parameters based on the complex spectrum are proposed. And analyses of vehicle crash acceleration data are described to show the effectiveness.
