Abstract: For the limitations of traditional counting and statistic methods in drawing up load spectrum and the particularity of high-speed train gear drive load measurement, an indirect measurement scheme of torque of high-speed train drive system is proposed based on motor active power. Statistic calculation of the torque-revolution history of the gear drive system is carried out. Synthesizing extreme value theory and non-parametric probability density estimation, a load data statistical method is introduced. The probability density function of the overall load samples is obtained, and load extreme extrapolation and load spectrum compression are realized. Accordingly, high-speed train gear transmission unit's load spectrum is established. A case study based on measured network end power of rolling stock is presented to verify the proposed scheme.

Key words: vehicle engineering, load spectrum, extreme value extrapolation, indirect measurement