Vehicle launch shudder is the severe torsional vibration phenomenon of driveline under different gear and throttle opening while launching in different road load. The phenomenon undergoes three stages, including vehicle launching, severe shudder and smoothly riding. The frequency components and amplitudes of the vibration acceleration signal have significant time-varying characteristics. This paper introduces three methods of time-frequency analysis, such as short time Fourier transform, Wigner-Ville distribution and continuous wavelet transform. On this basis, the appropriate time-frequency method is chosen to analyze the acceleration signal of different positions in the car under the conditions of M2 gear and small throttle opening. Then, the vibration time-frequency characteristics of three stages are revealed. Finally, this paper studies the frequency characteristic of the three stages combined with the FFT.
. 汽车起步颤振的时频分析[J]. 噪声与振动控制, 2013, 33(1): 108-113.
. Time and Frequency Analysis of Vehicle’s Launch Shudder[J]. , 2013, 33(1): 108-113.